The present invention provides an austenitic stainless steel having excellent resistance to high-temperature corrosion and thermal fatigue cracking, which contains, in terms of mass%, 15.0-23.0% Cr and 6.0-20.0% Ni, and the surface layer part of which has been coated with a high-energy-density processed layer having an average thickness of 5-30 µm.
Provided is a method for more widely spreading the use of an existing technique for suppressing methane emission. A method for increasing suppression of methane from a paddy field, the method including the following steps: an emission amount calculation step for calculating, from a basic cultivation parameter for rice in a paddy field, the emission amount (A) of methane normally generated when rice is cultivated in the paddy field; a suppressed emission amount calculation step for calculating the rate of suppression of methane emission (B1) or the suppressed emission amount (B2) from a methane-suppressed cultivation parameter that is used when rice is cultivated in the paddy field and that relates to emission of methane including water-level management and the amount of material used for suppressing the generation of methane; a discount rate calculation step for calculating a discount rate (C) (0 ≤ C ≤ 1) for the suppression of methane emission for calibrating the methane-suppressed cultivation parameter after rice has been cultivated in the paddy field, by using discount rate information including information about the use of material used for suppressing the generation of methane during the period in which the rice has been cultivated,; a reduction calculation step for calculating the reduction in methane emission from the paddy field using the formula A × B1 × C or the formula (A - B2) × C in which the rate of suppression (B1) or the suppressed emission amount (B2) is used; and a carbon-credit-awarding step for acquiring carbon credits as compensation for the reduction amount, and awarding the carbon credits to a creditor.
In the past, it was said that in planted forests such as those of Japanese cedar, hinoki, etc., forest function would be restored if illumination intensity in the forest is secured by reducing the density of standing trees by forest maintenance work such as periodic thinning, pruning, etc. However, because the time that the interior of overplanted forests has been maintained with a low illumination intensity is long, soil acidification is advanced and the number of areas where vegetation has not recovered is increasing. Moreover, in areas where soil pH has decreased significantly and which have become strongly acidic due to being special kinds of soils such as acid sulfate soils, improvement of the soil environment cannot be anticipated if left alone as such. The invention is configured so that a soil dressing (2) obtained by mixing steel converter slag (3) and an organic material (4) to which an add-in material (7) obtained from plant seeds (8) and/or fertilizer (9) and binder (10) is added, is used as an acidity-mitigating base material (1) and said acidity-mitigating base material (1) is supplied to a target ground (G) where the soil pH has decreased and which has become a strongly acidic soil.
Provided is a welded duplex stainless joint in which the occurrence of precipitation of a σ phase during high heat input welding can be prevented and which exhibits excellent SCC resistance under high-temperature chloride environments. A weld metal for this welded duplex stainless joint contains, in mass%, 0.030% or less of C, 0.20-1.00% of Si, 8.00% or less of Mn, 0.040% or less of P, 0.0100% or less of S, 2.00% or less of Cu, 7.00-12.00% of Ni, 20.0-30.0 of Cr, 1-4% or Mo, 0.100-0.350% of N, 0.040% or less of sol.Al, and 0.035% or less of O, with the remainder being made up by Fe and impurities, wherein the following formulae (1) and (3) are fulfilled. 2.2Cr+7Mo+3Cu > 66 (1) Cr+11Mo+10Ni-12(Cu+30N) < 100 (3) In the formulae (1) and (3), the content (mass%) of an element in the matrix material or the weld metal is assigned to the symbol of the element.
Provided is a method for cold drawing of a steel pipe so as to satisfy the conditions of cold drawing: a degree of processing RD of 20 to 35% on the outer diameter and a degree of processing RT of 5 to 25% on the thickness of an increased-thickness side. Furthermore, the drawing is preferably performed under the condition that satisfies RT/RD≤0.5, where RD=100(D0-D)/D0, RT=100(T0-T)/T0, D0 and D are the outer diameter (mm) before and after cold drawing, and T0 and T are the thickness (mm) before and after cold drawing. The resulting steel pipe may be employed as parts for use with mechanical structures and automobiles, in the case of which the pipe to be cold drawn is improved in thickness difference so as to reduce the thickness difference of the pipe after cold-drawing, thereby achieving improved accuracy in the outer diameter and thickness.
B21C 1/00 - Fabrication des tôles, fils, barres, tubes métalliques ou d'autres produits semi-finis similaires par étirage
B21C 1/22 - Étirage par des machines ou appareils dans lesquels l'effort de traction est produit par des moyens autres que des tambours, p. ex. par chariot mû longitudinalement tirant ou poussant le matériau de façon à former des tôles, des barres ou des tubes métalliques spécialement adaptés à la fabrication d'objets tubulaires
A method of producing a cutting tool provided with a cemented carbide base material and a coating film formed on the base material, comprising the steps of forming a coating film of at least one from among metal nitride, metal carbide, and metal oxide by chemical vapor deposition or physical vapor deposition on the base material (step 1), and performing a mechanical hardening treatment on the surface layer of the coating film (step 2). The cutting tool thus obtained has excellent wear resistance and lubricating ability.
B23P 15/28 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
B23C 5/16 - Outils de fraisage caractérisés par des particularités physiques autres que la forme
B24C 1/10 - Méthodes d'utilisation de jet abrasif en vue d'effectuer un travail déterminéUtilisation d'équipements auxiliaires liés à ces méthodes pour augmenter la compacité des surfaces, p. ex. par grenaillage
A steel material for thermal cutting using oxygen, which has a chemical composition that contains, in mass%, 0.06 to 0.20% of Si, 0.010 to 0.033% of P, and more than 0.02 to 0.08% of Al and that satisfies P/Si ≥ 0.12 and Al/Si ≤ 0.60, and which has, on the surface, a scale wherein an Si-rich region having an Si concentration of 0.4% or more is present in the form of a layer and an Al-rich region having an Al/Si ratio of 0.3 or more is present in the form of a layer on the surface-layer side of the Si-rich region.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
8.
CORROSION-RESISTANT STEEL MATERIAL FOR CARGO OIL TANK
Disclosed is a corrosion-resistant steel material for a cargo oil tank, which has excellent resistance to general corrosion and local corrosion and is characterized by containing, in mass%, 0.01-0.2% of C, 0.01-1.0% of Si, 0.05-2.0% of Mn, 0.002-0.1% of P, 0.01% or less of S, 0.01-2.0% of Cu, 0.01-1.0% of Ni, more than 0% but less than 0.01% of W and 0.1% or less of Al, with the balance made up of Fe and impurities. The corrosion-resistant steel material for a cargo oil tank may additionally contain one or more elements selected from among Cr, Mo, Ti, Zr, Sb, Sn, Nb, V, B, Ca, Mg and REM. The surface of the corrosion-resistant steel material for a cargo oil tank may be coated with a sulfide layer or an anti-corrosion coating film.
In the disclosed manufacturing method for a steel pipe, when quenching that is rapidly cooled after being heated is applied to a steel pipe, the pipe is heated to a quenching temperature defined by formula (1) by means of high frequency induction heating, and the time required from when the temperature of the pipe heated by high frequency induction heating has reached the temperature which is the transformation point of Ac3 to when rapid cooling is initiated is not more than 6 seconds if the quenching temperature is at least 975˚C, not more than 8 seconds if the quenching temperature is at least 950˚C but less than 975˚C, and not more than 9 seconds if the quenching temperature is less than 950˚C. Thus, the structure of the steel pipe undergoes complete Martensite transformation, and a highly strong and tough steel pipe can be obtained because the crystal grains are miniaturised. In formula (1) T1 is the quenching temperature (˚C), TAc3 is the Ac3 transformation point temperature (˚C). (1)TAc3+40˚C≤T1≤1000˚C…
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C21D 1/10 - Durcissement de surface par application directe d'énergie électrique ou ondulatoireDurcissement de surface par radiation particulaire par induction électrique
C21D 1/18 - DurcissementTrempe avec ou sans revenu ultérieur
B60R 21/268 - Moyens gonflables de retenue ou d'immobilisation des occupants prévus pour se gonfler lors d'un choc ou en cas de choc imminent, p. ex. sacs gonflables caractérisés par la source de fluide de gonflage ou par les moyens de commande de l'écoulement du fluide de gonflage utilisant l'émission instantanée de gaz comprimé stocké
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
10.
AUSTENITIC STAINLESS STEEL TUBE HAVING EXCELLENT STEAM OXIDATION RESISTANCE, AND METHOD FOR PRODUCING SAME
Provided is an austenitic stainless steel tube having excellent steam oxidation resistance. The steam oxidation-resistant austenitic stainless steel tube contains, by mass %, 14-28% of Cr, and 6-30% of Ni, and has a region in the metal structure thereof at a depth of 5-20μm from the internal surface which fulfils the following formula. (α/β)×δ/ε×100 ≥ 0.3, with the symbols in general formula (1) representing the following. α is the total of the number of pixels in a digital image of a region in which the orientation difference detected using electron backscatter diffraction is 5-50 degrees between adjacent crystals; β is the total number of pixels in the digital image of the region measured using electron backscatter diffraction pattern; ε is the analysis pitch (μm) of the electron backscatter diffraction; and δ is the grain boundary width (μm).
An element tube (an element tube for a seamless steel tube) to which straightening by a straightener is applied after heat-transferred and tube-made, and which is then submitted to cold working, wherein, during the straightening by the straightener, cooling water is sprayed all over the surfaces of rolls (1a, 1b) constituting the straightener, and soft reduction is applied to the element tube with the loads added to the straightener rolls (1a, 1b) as 550 kN or less, thereby making it possible to effectively suppress surface indentation flaws occurring in the element tube for the seamless steel tube. It is effective as a means for the soft reduction to use a hot straightener for adding straightening such as bend removal to the element tube in a temperature range of 500-550˚C inclusive after heat-transferred and tube-made. It is desirable to perform the spraying of the cooling water all over the surfaces of the rolls (1a, 1b) by one or more means of the increased wide angle of the tip shape of cooling water nozzles, the proper arrangement of the cooling water nozzles, and an increase in the water volume of cooling water to be sprayed.
B21D 3/02 - Redressage ou remise en forme des barres, tubes ou profilés métalliques, ou des objets déterminés faits à partir de ces matériaux, qu'ils comportent ou non des parties en tôle au moyen de rouleaux matriceurs
B21D 3/00 - Redressage ou remise en forme des barres, tubes ou profilés métalliques, ou des objets déterminés faits à partir de ces matériaux, qu'ils comportent ou non des parties en tôle
12.
STEEL PIPE FOR AIR BAG AND PROCESS FOR PRODUCING SAME
Provided is a steel pipe for air bags which is reduced in alloy cost and has a tensile strength of 1,000 MPa or higher and a vTrs100 of -80ºC or less. A process for producing the steel pipe is also provided in which the number of softening/annealing treatments in the cold drawing step can be minimized. Stable properties can be obtained even through quench hardening conducted by mass-scale high-frequency heating. The steel pipe has a steel composition which contains, in terms of mass%, 0.05-0.20% C, 0.10-0.50% Si, 0.10-1.00% Mn, up to 0.025% P, up to 0.005% S, 0.005-0.10% Al, 0.0005-0.0050% Ca, 0.005-0.050% Nb, 0.005-0.050% Ti, 0.01-0.50% Cu, 0.01-0.50% Ni, 0.01-0.50% Cr, 0.0005-0.0050% B, and 0.002-0.010% N, with the remainder comprising Fe and incidental impurities.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C21D 7/10 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à froid sur toute la section droite, p. ex. des tiges d'armature pour béton
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
13.
SEAMLESS STEEL PIPE FOR LINE PIPE AND METHOD FOR PRODUCING THE SAME
Provided is a seamless steel pipe for a line pipe having high strength and toughness. The seamless steel pipe for a line pipe has a chemical composition by mass% of 0.02% to 0.10% of C, 0.5% or less of Si, 0.5% to 2.0% of Mn, 0.01% to 0.1% of Al, 0.03% or less of P, 0.005% or less of S, 0.005% or less of Ca, and 0.007% or less of N, and further, one or two or more selected from the group consisting of 0.008% or less of Ti, less than 0.06% of V, and 0.05% or less of Nb, and Fe and impurities as the balance, wherein the carbon equivalent (Ceq) as defined by formula (1) Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cr)/15 (1) is 0.38 or greater; the Ti, V and Nb content satisfies formula (2); Ti+V+Nb<0.06 (2) and the size of a carbonitride containing one or two or more of Ti, V, Nb, and Al is 200 nm or less.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
A three-roll fixed diameter rolling machine is used, and when the external diameter processing degree (ρi) (%) of an (i)th stand is represented by formula (1) below, fixed diameter rolling is carried out under conditions such that the external diameter processing degree ratio (R), represented by formula (2) below, is within the range of 0.95-1.05. Formula (1): ρi= [ { (Bi-1 + Ai-1) - (Bi+Ai) } / (Bi-1 + Ai-1) ] x 100… In formula (1), Ai, Ai-1 : the distance between the flange edge of a grooved roll and the pass centre in each of the (i)th stand and (i-1)th stand, and Bi, Bi-1 : the distance between the groove base of a grooved roll and the pass centre in each of the (i)th stand and (i-1)th stand. Formula (2): R= ΣρEven／ΣρOdd… In formula (2), ΣρEven: the sum total of the external diameter processing degree (ρi) of the even numbered stands, and ΣρOdd: the sum total of the external diameter processing degree (ρi) of the odd numbered stands. Thus, the thickness distribution in the circumferential direction of the pipe produced can be made to be uniform.
B21B 17/14 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" sans mandrin
Disclosed is an age-hardenable steel which contains 0.025-0.25% C, 0.05-0.50% Si, 0.50-2.5% Mn, up to 0.05% P, up to 0.10% S, 0.05-2.5% Cr, up to 0.06% Al, 0.005-0.20% Ti, 0.10-0.60% V, and up to 0.020% N, with the remainder comprising Fe and impurities, and which satisfies the relationships C+0.3Mn+0.25Cr≥0.65 and C+0.1Si+0.2Mn+0.2Cr+0.35V≤0.76. This steel is usable as a material for machine parts for use in motor vehicles, industrial machines, construction machines, etc. The age-hardenable steel may contain one or more of Mo, B, Cu, Ni, Nb, Ca, and Bi in place of part of the Fe, provided that the following are satisfied: C+0.3Mn+0.25Cr+0.6Mo+Beff≥0.65 (Beff=0 when B<0.0005%, and Beff=0.05 when 0.0005≤B≤0.005%) and C+0.1Si+0.2Mn+0.2Cr+0.35V+0.2Mo≤0.76. Also disclosed is a production process whereby the steel in the state of having low hardness is cut into the shape of a machine part and is thereafter hardened by aging treatment. Thus, a machine part having desired strength can be produced.
[Problem to be solved] To provide a method whereby it is possible to measure the flatness of a sheet material without requiring a large-scale measuring device. [Solution] The method involves projecting a contrast pattern (P), comprising light areas and dark areas, onto the surface of a sheet (S) traveling in the lengthwise direction, and using an imaging means (2) with an imaging field larger than the width of the sheet material to acquire the contrast pattern, and analyzing the acquired pattern image in order to measure the flatness of the sheet material. The method is characterized in that the contrast pattern, in which the light areas are positioned at a prescribed spacing both longitudinally and transversely, is formed by the light from a LED light source (1) equipped with multiple LEDs (111) positioned at a prescribed spacing both longitudinally and transversely, and is projected on the surface of the sheet material such that the longitudinal direction of said contrast pattern is aligned with the long side of the sheet material and the transverse direction of said contrast pattern is aligned with the short side of the sheet material.
G01B 11/25 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des contours ou des courbes en projetant un motif, p. ex. des franges de moiré, sur l'objet
B21B 38/02 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p. ex. détection de la position, inspection du produit pour mesurer la planéité ou le profil des bandes
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces
Disclosed is a steel wall provided with both excellent rigidity and excellent waterproofing properties. Also disclosed is a construction method for a steel wall, whereby a construction method that suppresses vibration and noise, which was difficult with conventional composite sheet steel pile, can be readily used. Said steel wall (3) is formed by a combination of hat-shaped sheet steel piles (1) as sheet steel pile and steel pipes (2). In this steel wall (3), a plurality of hat-shaped sheet steel piles (1) are connected by joints (1d) to provide a sheet steel pile wall, and steel pipes (2) touch all or part of the hat-shaped sheet steel piles (1) in this sheet steel pile wall, with the longitudinal direction of the pipes following the longitudinal direction of the hat-shaped sheet steel piles (1).
Disclosed is a steel wall which combines high rigidity equivalent to that of a steel pipe sheet pile wall and high water cut-off properties equivalent to those of a steel sheet pile wall. Also disclosed is a method for constructing the steel wall, to which a technique for suppressing vibration or noise, which was difficult to do with a conventionally combined steel sheet pile can be easily applied. Specifically disclosed is a steel wall (3), wherein a plurality of hat-shaped steel sheet piles (1) are connected by joints (1d) so as to have a steel sheet pile wall, and steel pipes (2) come into contact with all of the steel sheet pile wall, or some of the hat-shaped steel sheet piles (1) so as to make the longitudinal direction thereof follow the longitudinal direction of the hat-shaped steel sheet piles (1). The construction of the steel wall (3), wherein the steel pipes (2) and the hat-shaped steel sheet piles (1) with which the steel pipes (2) come into contact are joined in contact parts with one another over the entire length of the contact parts, or the combined steel sheet pile is provided by joining the steel pipes (2) and the hat-shaped steel sheet piles (1) in some of the contact parts. Then, auger screws of earth augers are inserted into the steel pipes (2), and the combined steel sheet pile is cast by press-in while excavating a wider range of ground than the diameter of the steel pipes (2) under the steel pipes (2).
Disclosed is a test device (1) for estimating the performance of a threaded joint of an oil well pipe by using a first steel pipe (P1) and a second steel pipe (P2). The test device (1) is provided with a base (2) which vertically erects and secures the first steel pipe (P1) in such a way that the tip section thereof is made to protrude from the upper surface of the base (2), and that a portion of the remainder of the first steel pipe (P1) is positioned underground. A support member (3) which is mounted on the base (2) is disposed beside the first steel pipe. The second steel pipe (P2) is suspended above the first steel pipe (P1) by means of a suspension mechanism (4). The threaded joint is fastened or released by rotating the second steel pipe (P2) with respect to the first steel pipe (P1) by means of a first tong (5) and a second tong (6). A sway brace apparatus (7) which is held between components of the support member (3) restricts the maximum sway amount of the second steel pipe (P2) within a predetermined value.
E21B 47/01 - Dispositifs pour supporter des instruments de mesure sur des trépans, des tubes, des tiges ou des câbles de forageProtection des instruments de mesure dans les trous de forage contre la chaleur, les chocs, la pression ou similaire
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
20.
HIGH-STRENGTH STAINLESS STEEL FOR OIL WELL AND HIGH-STRENGTH STAINLESS STEEL PIPE FOR OIL WELL
Disclosed is a high-strength stainless steel for oil wells having superior corrosion resistance in high temperature environments, having superior SSC resistance at normal temperatures, and having workability superior to 13% Cr steel. Specifically disclosed is a high-strength stainless steel for oil wells having a chemical composition that contains, in percent by mass, 0.05% or less C, 1.0% or less Si, 0.3% or less Mn, 0.05% or less P, less than 0.002% S, more than 16% and not more than 18% Cr, 1.5 - 3.0% Mo, 1.0 - 3.5% Cu, 3.5 - 6.5% Ni, 0.001 - 0.1% Al, 0.025% or less N, and 0.01% or less O, with the remainder being Fe and impurities. The high-strength stainless steel for oil wells also has a structure that includes a martensite phase, ferrite phase at a volume fraction of 10 - 48.5%, retained austenite phase at a volume fraction of 10% or less, yield strength of 758 MPa and uniform elongation of 10% or higher.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
21.
HOT ROLLED DUAL PHASE STEEL SHEET HAVING EXCELLENT DYNAMIC STRENGTH, AND METHOD FOR PRODUCING SAME
Disclosed are: a hot rolled dual phase steel sheet which has improved strength in a middle strain rate range; and a method for producing the hot rolled dual phase steel sheet. Specifically disclosed is a hot rolled dual phase steel sheet which has a chemical composition that contains, in mass%, 0.1-0.2% of C, 0.3% or more but less than 1.0% of Si and Al in total, 1.0-3.0% of Mn, 0.02% or less of P, 0.005% or less of S, 0.1-0.5% of Cr and 0.001-0.008% of N, and additionally contains 0.002-0.05% of Ti and/or 0.002-0.05% of Nb with the balance made up of Fe and impurities. The hot rolled dual phase steel sheet has an area fraction of ferrite of 7-35%, ferrite particle diameters within the range of 0.5-3.0 μm, and a nano hardness of ferrite within the range of 3.5-4.5 GPa. The second phase that is the portion other than ferrite contains bainitic ferrite and/or bainite and martensite, and the second phase has an average nano hardness of 5-12 GPa. The second phase contains a high hard phase of 8-12 GPa in an area fraction of 5-35% relative to the entire structure.
C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
Disclosed is a combined steel sheet pile wall of which shaped steel can be disposed on the side of the steel sheet pile to which earth pressure is applied even if the steel sheet pile and shaped steel are non-affixed across nearly the entire length thereof and form an overlapped beam structure. The combined steel sheet pile wall (26) is provided with: a steel sheet pile body (1); and an elongated steel H-beam (24) that is disposed along the axial direction of the steel sheet pile body (1) and that effectively contacts one side surface of the steel sheet pile body (1) that is the side to which earth pressure is applied. The steel H-beam (24) is provided with a flange (22) that forms the sheet pile contact section that contacts one side surface of the steel sheet pile body (1). The steel H-beam (24) is provided with another flange (23) that forms an earth-pressure-receiving section provided at a position separated from the steel sheet pile body (1) and the first flange (22) along the direction that the earth pressure is applied. A web (25) that forms a connecting section is provided between the flange (22) that forms the sheet pile contact section and the flange (23) that forms the earth-pressure-receiving section. The horizontal width of the flange (23) that forms the earth-pressure-receiving section is wider than the horizontal width of the flange (22) that forms the sheet pile contact section.
Provided are a connected wall structure consisting of steel pipe sheet piles and a steel sheet pile, and a method of constructing the same, such that there is formed a connected structure wherein a certain degree of construction errors can be allowed, with the result that constructability is excellent and construction cost can be reduced. In order that steel pipe sheet piles (1) which are installed by being driven, with a gap formed therebetween, will be connected together by a steel sheet pile (2) for the purpose of forming a connected wall structure, there are provided, on sides of the steel pipe sheet piles (1), connecting members (3) having slits (3a) which continue in the longitudinal direction. The ends of the sheet pile (2) are fitted into the slits (3a) from the longitudinal direction. Predetermined play (u) for absorbing construction errors between the steel pipe sheet piles (1) is provided in these connecting sections. Since spaces sufficient to absorb construction errors are provided in the connection sections for the steel pipe sheet piles (1) and the steel sheet pile (2), the ends of the steel sheet pile (2) can be easily fitted and installed even if the steel pipe sheet piles (1) undergo elongation or shrinkage due to driving.
Disclosed is a natural graphite particle forming a negative electrode active substance for a non-aqueous electrolyte secondary battery, characterized by having a circularity of 0.93 - 1.0 and a surface roughness of 1.5% of the largest particle diameter. Also disclosed is a method for producing modified particles of natural graphite in which grinding and spheronizing are carried out by applying an impact force to the natural graphite particles and there is a process for obtaining intermediate particles with a circularity of 0.93 - 1.0 as well as a process for obtaining the modified natural graphite particles by performing surface smoothing using mechanical milling of the intermediate particles obtained.
Disclosed is an operation control method of tandem rolling mill that enables rolling under high pressure at a latter-stage stand that is of the tandem rolling mill and that is necessary in such purposes as the production of fine-grained steel. Further disclosed is a method for producing a hot-rolled steel sheet. The operation control method of a tandem rolling mill includes a first step for determining outgoing-side sheet thickness at each stand when rolling a constant region of a rolled member, and a second step for determining the outgoing-side sheet thickness of each stand when rolling the tip of the rolled member in a manner so that a pre-fastening load is no greater than a set value; the rolled member is rolled in a manner so as to become the outgoing-side sheet thickness determined in the second step at least until the very tip of the rolled member is engaged by each stand; the constant region of the rolled member is rolled to the outgoing-side sheet thickness determined in the first step by means of the N-m+1-th stand to the N-th stand; and the outgoing-side sheet thickness from the N-m+1-th stand to the N-th stand determined in the second step is thicker than the outgoing-side sheet thickness determined in the first step. The method for producing a hot-rolled steel sheet has a step that rolls a steel sheet using a hot-finishing mill array, the operation of which is controlled by said operation control method.
B21B 37/72 - Commande de la partie terminale arrièreCommande de la partie terminale avant
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
26.
METHOD FOR PRODUCING AND DEVICE FOR PRODUCING HOT-ROLLED STEEL SHEET
Disclosed are a method for producing and a device for producing a hot-rolled steel sheet that are able to evenly cool a rolled member and to increase the surface quality of the rolled member. The device for producing a hot rolled steel sheet is provided with: a rolling stand; a supply means that can supply a lubricant to a work roll and/or a backup roll; an online roll grinding device; and a removal means that can remove at least a portion of the lubricant before grinding the surface of the work roll by means of said grinding device. The method for producing a hot rolled steel sheet has: a step wherein, when rolling a plurality of rolled members using said production device, at least a portion of the lubricant adhered to the work roll, or the work roll and the backup roll, is removed using the lubricant removal means after completion of rolling of the leading rolled member; a step wherein, after said step, the work roll is ground using the online roll grinding device; and a step wherein lubricant is supplied towards the work roll and/or the backup roll from the lubricant supply means.
B21B 27/10 - Lubrification, refroidissement ou chauffage des cylindres extérieurement
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
B21B 28/04 - Maintenance des cylindres en état de fonctionnement, p. ex. remise en état en cours de fonctionnement, p. ex. polissage
27.
RETARDER CONTROL DEVICE, RETARDER CONTROL METHOD, AND VEHICLE HAVING RETARDER CONTROL DEVICE
The disclosed retarder control device aims at ECU standardization and is able to function sufficiently as a retarder auxiliary brake regardless of driving conditions. A retarder control device (1) is provided with: a retarder (2) having both an energy conversion means (3) for converting rotational energy to electric energy and a heat dissipation means (4) for converting said electrical energy to thermal energy and dissipating the heat; a temperature sensor (5) for detecting the temperature of the heat dissipation means (4); a rotation speed detection means (6) for detecting the rotation speed of the heat dissipation means (4); and a control unit (7) which, when the temperature detected by the temperature sensor (5) exceeds a prescribed threshold value, performs control such that less electrical energy is generated. The control unit (7) variably sets the prescribed threshold value in accordance with the rotation speed of the heat dissipation means (4) and performs control such that less electric energy is generated when the temperature of the heat dissipation means (4) detected by the temperature sensor (5) exceeds the prescribed threshold value corresponding to the rotation speed of the heat dissipation means (4) detected by the rotation speed detection means (6).
Disclosed is a method for straightening a pipe by using, as a straightening roll for a straightener, an asymmetric roll with right and left roll shoulder portions which have different maximum roll diameters of D1 (exit side) and D2 (inlet side) and by positioning the roll shoulder portion of the smaller roll diameter on the pipe inlet side. The straightening roll for this method includes the roll shoulder portions (3a, 3b) and a roll barrel portion (4), satisfying that D1 > D2 and 0.004 ≤ (D1-D2)/d ≤ 0.2, where d is the outer diameter of a pipe to be straightened. It is possible to specify the radius of curvature of the inlet and exit side shoulder portions or the curve defining the outer surface of the roll barrel portion in a cross section of the roll taken along a plane passing through the axial center of the roll. This roll can prevent the deformation of the mouth of a pipe end that may occur during straightening of the pipe, thus providing enhanced straightening effects.
B21D 3/02 - Redressage ou remise en forme des barres, tubes ou profilés métalliques, ou des objets déterminés faits à partir de ces matériaux, qu'ils comportent ou non des parties en tôle au moyen de rouleaux matriceurs
Disclosed is steel pipe production equipment that has excellent steel pipe production efficiency and can carefully manage the traceability of the steel pipes. The steel pipe (P) production equipment (100) is equipped with a pipe production line (10), a heat treatment line (20) that is directly connected to the pipe production line, and a refinement line (30) that is directly connected to the heat treatment line, and is characterized in that at least a correction step for correcting bending in the steel pipe, an ultrasonic flaw detection step for detecting flaws in the steel pipe using ultrasonic waves, a surface inspection step for inspecting the surface of the pipe, a hydraulic test step for testing the hydraulic pressure in the steel pipe, an actual weight/length measurement step for measuring the weight and length of the steel pipe, and a marking step for marking the steel pipe with a stencil are executed in the refinement line (30), and in that the steel pipe is not conveyed off the line en route from the entrance of the pipe production line until the exit of refinement line.
B21B 23/00 - Laminage des tubes, non limité à l'un des procédés prévus dans un seul des groupes , p. ex. par procédés combinés
B21C 37/30 - Finition des tubes, p. ex. calibrage, polissage
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
B23Q 41/08 - Caractéristiques se rapportant au maintien d'un bon fonctionnement
30.
HEAT TREATMENT METHOD FOR LONG MATERIAL, MANUFACTURING METHOD FOR LONG MATERIAL, AND HEAT TREATMENT FURNACE USED IN ABOVE METHODS
Disclosed is a method which is for carrying out heat treatment on long material to be heat treated, and which uses a batch-type heat treatment furnace which is cylindrical in shape, and the inside of which has been divided into a plurality of heating zones along the length-wise direction thereof, and both ends of which have been blocked. The end-most sections of the heat treatment furnace are divided into a plurality of heating zones which are shorter in length than the heating zones which are not in the end most sections, and a heat source is disposed in every heating zone. The heat treatment method comprises a series of steps: in advance, determine the heating output pattern of each heat source in each heating zone in the end-most sections, on the basis of the results of actual measured temperatures during the heating of the end sections of the material to be heat treated (step one); individually control the heating output of the heat sources during the heat treatment of the material to be heat treated, on the basis of the heating output pattern of each heat source, as determined in step one, and the results of measuring the inside-furnace temperature of each heating zone in the end-most sections and the other heating zones (step two). This heat treatment method enables material to be heat treated to be accurately and evenly heated along the entire length thereof, even in heat treatment furnaces which do not have heat sources in both end walls.
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
Disclosed is a method for manufacturing a UOE steel pipe which determines whether the shapes of the bevels formed at the edge portions of the base steel plate of the UOE steel pipe by an edge planer are normal or not and speedily outputs to an operator the necessity to correct the shapes of the bevels, when necessary. A thick plate (7) with the bevels (8a, 8b) formed at the edge portions (7a, 7b) is sequentially subjected to C-press operation, U-press operation, and O-press operation, thereby obtaining an open pipe (13), and the bevels (8a, 8b) of the open pipe (13) are butt-welded, so that the UOE steel pipe (30) is manufactured. In manufacturing the UOE steel pipe (30), the shapes of the bevels (8a, 8b) of the thick plate (7) before being subjected to the C-press operation are measured by a bevel shape measuring device (6) and on the basis of the result of the measurement, the necessity to correct the shapes of the bevels (8a, 8b) of the thick plate (7) is determined before the C-press operation is started.
B21C 37/08 - Fabrication de tubes à joints soudés ou brasés
B21C 37/083 - Alimentation en matériau en bandes, ou opérations combinées avec cette alimentation
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
B23K 31/00 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux
32.
SEAMLESS STEEL PIPE FOR STEAM INJECTION, AND METHOD OF MANUFACTURING SAME
Disclosed is a steel pipe for steam injection, which exhibits high yield stress even at a temperature of 350°C. Specifically disclosed is a seamless steel pipe for steam injection which has a chemical composition that includes, in terms of mass%, 0.03-0.08% C, 0.05-0.5% Si, 1.5-3.0% Mn, more than 0.4 but at most 1.2% Mo, 0.005-0.100% Al, 0.001-0.005% Ca, 0.002-0.015% N, at most 0.03% P, at most 0.01% S and at most 1.5% Cu, with the remainder being Fe and impurities. The seamless steel pipe for steam injection is manufactured via a hot working process, followed by a water cooling process, a quenching process and a tempering process.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
B21B 23/00 - Laminage des tubes, non limité à l'un des procédés prévus dans un seul des groupes , p. ex. par procédés combinés
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
33.
HOT-ROLLED STEEL SHEET MANUFACTURING METHOD AND MANUFACTURING DEVICE
Provided are a hot-rolled steel sheet manufacturing method and manufacturing device, by which a hot-rolled steel sheet having excellent surface properties and fine texture can be manufactured. Specifically provided is a hot-rolled steel sheet manufacturing method, wherein a heating unit, a descaling unit, a finishing rolling mill line, a cooling unit disposed in the finishing rolling mill line, and a quenching unit disposed just behind the finishing rolling mill line are used, and by controlling the operations of the heating unit, the cooling unit, and the quenching unit, the temperature (T1) of a material to be rolled on the finishing rolling mill line entrance side, the temperature (T2) of the material to be rolled on the final stand entrance side of the finishing rolling mill line, and the temperature (T3) of the material to be rolled on the quenching unit exit side are controlled. Also provided is a hot-rolled steel sheet manufacturing device which is provided with a heating unit, a descaling unit, a finishing rolling mill line, a cooling unit disposed in the finishing rolling mill line, a quenching unit disposed just behind the finishing rolling mill line, and a control means, and controls T1, T2, and T3 by controlling the operations of the heating unit, the cooling unit, and the quenching unit by the control means.
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
B21B 45/00 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
34.
CONTINUOUS STEEL WALL AND METHOD FOR CONSTRUCTING SAME
Disclosed are a continuous steel wall and a construction method therefor whereby steel sheet piles and stiffeners can reliably be put in contact with each other even if the steel sheet piles and stiffeners are driven into the ground separately. In said construction method, a first guide member (24) that fits around an H-shaped steel stiffener (3) is provided at the bottom end of a steel sheet pile (2) so as to be able to move in the long direction of the H-shaped steel stiffener (3). Also, a second guide member (33) is provided at the bottom end of the H-shaped steel stiffener (3) so as to be able to move in the long direction of another steel sheet pile (2a), driven in prior to and next to the steel sheet pile (2) that the H-shaped steel stiffener (3) contacts. By fitting around the previously-driven steel sheet pile (2a), the second guide member (33) fixes the position of the H-shaped steel stiffener (3) with respect to the previously-driven steel sheet pile (2a). By having the second guide member (33) fit around the previously-driven steel sheet pile (2a), the H-shaped steel stiffener (3) can be driven into the ground positioned and guided by the previously-driven steel sheet pile (2a). Next, the first guide member (24) is fitted around the already-driven H-shaped steel stiffener (3), allowing the next steel sheet pile (2) to be driven into the ground guided by the H-shaped steel stiffener (3).
Provided are a positioning device capable of positioning a workpiece at lower cost, in a reduced space, and with higher accuracy even when the weight of the workpiece is large, and a working system. Specifically provided is a positioning device comprising three robot arms (1-3) each having an arm and an actuator for driving the arm, a mounting table (5) supported at a front end portion of each of the three robot arms (1-3), a fixture (6) for fixing a workpiece (W) mounted on the mounting table (5) to the mounting table (5), and a controller (9) for controlling the operations of the actuators.
In order to prevent rotation at the installation position of a friction member, a rail car brake lining that is pressed against the sliding surface of a brake disc by a brake caliper is disclosed, which is equipped with friction members (11) that press against the sliding surface of the brake disc and a back plate (12) that is attached to the brake caliper in order to support the friction members (11). The friction members (11) are divided into at least two parts in the radial direction and the circumferential direction of the brake disc. Each of the friction members (11) are formed with a sliding material (11a) that comes into contact with the sliding surface of the brake disc, and a back metal (11b) that is fixed on the back plate (12) side of the sliding material (11a). Protrusions (11ba) are formed on the back plate (12) side of the back metal (11b). Grooves (12b) that come into contact with the protrusions (11ba) formed on the back metal (11b) are formed on the friction member (11) side of the back plate (12). Disc springs (14) or spherical seats (15) are interposed between the back plate (12) and the back metal (11b) of each friction member (11). As a result, rotation at the installation position of the friction members can be prevented without adding new components.
F16D 65/092 - Bandes, sabots ou patinsPivots ou leurs organes de support pour freins à engagement axial, p. ex. freins à disques
B61H 5/00 - Emploi ou aménagements de freins comportant de substantielles surfaces de freinage radiales pressées l'une contre l'autre selon un mouvement axial, p. ex. freins à disques
37.
HEAT-TREATED STEEL MATERIAL, METHOD FOR PRODUCING SAME, AND BASE STEEL MATERIAL FOR SAME
Disclosed is a steel material which can be sufficiently quenched by short time heating at low temperatures and is capable of providing a high strength molded article. The steel material is suitable as a material for hot pressing or hot three-dimensional bending. Specifically, the steel material has a chemical composition that contains, in mass%, 0.05-0.35% of C, 0.5% or less of Si, 0.5-2.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.1% or less of sol. Al, 0.01% or less of N, and if necessary, one or more elements selected from the group consisting of 0.0001-0.005% of B, 0.01-0.1% of Ti, 0.18-0.5% of Cr, 0.03-0.1% of Nb, 0.18-1.0% of Ni and 0.03-0.5% of Mo, and has a steel structure wherein the spheroidization ratio of carbides is 0.60-0.90.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
38.
STEEL MATERIAL EXHIBITING EXCELLENT FATIGUE-CRACK PROGRESS RESISTANCE AND CORROSION RESISTANCE, AND PRODUCTION METHOD FOR SAME
Disclosed is a steel material exhibiting excellent fatigue-crack progress resistance and corrosion resistance which has a chemical composition including, by mass%, 0.01-0.14% C, 0.04-0.6% Si, 0.5-2.0% Mn, 0.01% or less P、0.003% or less S, less than 0.2% Cu, more than 0.0007% but not more than 0.005% B, less than 0.05% Al, less than 0.007% N, 0.003% O, and 0.03-0.50% Sn, with the remainder being Fe and impurities, and the Cu/Sn ratio being 1 or less, and which is characterised in that the Bq value is 0.003 or less, the Ceq value is 0.15-0.35, and the oxide number in the region which is 2mm or less from the surface layer is 5x104 per 1 square mm. Furthermore, one more of the following may also be included: Mo, V, Nb, Ni, Cr, Ti, Ca, and Mg.
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
39.
STEEL PLATE EXHIBITING LITTLE WELDING DEFORMATION AND EXCELLENT CORROSION RESISTANCE
Disclosed is a steel plate exhibiting little welding deformation and excellent corrosion resistance, which has a chemical composition including, by mass%, not less than 0.0005% but less than 0.02% C, 0.01-0.7% Si, 0.1-5.0% Mn, 0.05% or less P、0.008% or less S, less than 0.2% Cu, 0.02-0.3% Nb, 0.003-0.1% Al, 0.01% or less N, 0.0005-0.004% B, and 0.03-0.50% Sn, with the remainder being Fe and impurities, and the Cu/Sn ratio being 1 or less, and which is characterised in that the metallic structure comprises 80% or more bainite structure, and the bainite hardness is 150-250 in terms of Vicker's hardness. Furthermore, one more of the following may also be included: Ti, Ni, Cr, Mo, V, Zr, Ca, Mg, and REM.
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
40.
LUBRICANT FOR HOT-ROLLING TOOLS, AND METHOD FOR SURFACE TREATMENT OF MANDREL BAR FOR USE IN PRODUCING SEAMLESS PIPE BY HOT ROLLING
A lubricant for hot-rolling tools which is prepared by dispersing and dissolving an oxide-type layer compound (such as potassium tetrasilicate mica, sodium tetrasilicate mica, vermiculite or bentonite), a boric acid compound (such as boric acid, potassium borate, or sodium borate), and graphite in water, wherein the content ratio of the oxide-type layer compound to the boric acid compound is 10:90 to 70:30 by mass, and the graphite content is 1.0 to 4.5%. In rolling with a mandrel mill, the lubricant is applied to the surface of a mandrel bar to form a lubricating film on the surface thereof. Thus, the lubricant exhibits excellent anti-seizure properties, while no lubricant residue remains on the inside surface of the resulting pipe.
C10N 30/00 - Propriétés physiques ou chimiques particulières améliorées par l'additif caractérisant la composition lubrifiante, p. ex. additifs multifonctionnels
C10N 30/06 - OnctuositéRésistance du filmAnti-usureRésistance aux pressions extrêmes
C10N 40/24 - Travail des métaux sans enlèvement substantiel de matièreDécoupage du métal à l'emporte-pièce
41.
MANUFACTURING METHOD FOR SMALL DIAMETER THIN-WALLED PIPE
Provided is a manufacturing method for a seamless steel pipe in which a small diameter thin-walled pipe is drawn by means of a tapered die (1), which is used as a processing die and is provided with an approaching part (1a) that has a tapered shape, and a bearing part (1b) that delimits the outer diameter in the drawing process, and a plug (2), which is inserted into the inner surface of a pipe (3) that is being drawn while the diameter of the pipe is being reduced by the tapered die (1). As a result of using the tapered die (1) wherein the approaching part (1a) forms an angle (α) of 15 - 20°, it is possible to reduce the striations on the inner surface of the pipe which occur during a hot pipe-manufacturing process without increasing the thickness of the base pipe, and thereby obtain a small diameter thin-walled pipe with a high quality inner surface. In the disclosed manufacturing method for a small diameter thin-walled pipe, it is preferable for the plug (2) to be a semi-floating plug provided with a finishing part (2b), which regulates the finished inner diameter of the pipe and a tapered part (2a), which is contiguous with the finishing part.
B21C 3/02 - MatricesEmploi d'un matériau spécifié pour ces filièresNettoyage de ces filières
B21C 3/16 - MandrinsMontage ou réglage des mandrins
42.
METHOD OF HEAT-TREATING METAL PIPES FOR NUCLEAR POWER PLANT, BATCH-TYPE VACUUM HEAT-TREATMENT FURNACE USED THEREFOR, AND METAL PIPE FOR NUCLEAR POWER PLANT TREATED USING SAME
Disclosed is a method of heat-treating metal pipes that are to be used in a nuclear power plant, the method involving: placing the metal pipes, which are to be placed in a batch-type vacuum heat-treatment furnace, on a plurality of metal beams that are lined up in the length direction of the metal pipes; and heat-treating said metal pipes; wherein the metal pipes are placed on the metal beams with a heat-resistant cloth having a thickness of 0.1 to 1.2 mm being disposed therebetween. Thus, it is possible to inhibit scratches from being formed on the outer surfaces of the metal pipes due to the heat treatment, and to reduce the staining of the outer surfaces of the metal pipes. Preferably, the composition, in percentage by mass, of each metal pipe used herein consists of: at most 0.15% of C; at most 1.00% of Si; at most 2.0% of Mn; at most 0.030% of P; at most 0.030% of S; 10.0-40.0% of Cr; 8.0-80.0% of Ni; at most 0.5% of Ti; at most 0.6% of Cu; at most 0.5% of Al; at most 0.20% of N; and Fe and impurities as the remainder.
G21D 1/00 - Détails des installations à énergie nucléaire
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
Disclosed is a defect inspection device that can precisely detect defects on the load surface of a pipe that has a load surface inclined away from the pipe end and defects in an inspection region between screw threads. Said defect inspection device, which can also detect defects on the outer surface of a lip section, is characterized by the provision of: a first light source (2); a first imaging means (3) which images the outer surface of a lip section (102) by receiving reflected light emitted from the first light source and reflected off the outer surface of said lip section; a second light source (7); a second imaging means (8) that images a load surface (103) by receiving reflected light emitted from the second light source and reflected off the load surface; a third light source (9); a third imaging means (10) that images an inspection region (106) between screw threads by receiving reflected light emitted from the third light source and reflected off said inspection region; and an inspection means that performs image processing on images taken by the first through third imaging means in order to detect defects on the outer surface of the lip section, on the load surface, and in the inspection region between screw threads.
Disclosed is a production method for seamless steel pipes used in line pipes, whereby the toughness of seamless steel pipes used in line pipes can be improved. A round billet having a chemical composition that includes, in mass%, 0.02 to 0.15% C, no more than 0.5% Si, and 0.5 to 2.5% Mn, with the remainder comprising Fe and impurities, is heated (S1). Rotary piercing is performed on the heated round billet to produce a blank tube (S2). The blank tube is rolled and the diameter thereof is fixed, thereby producing a seamless steel pipe (S3). The seamless steel pipe is cooled with water, and water cooling is halted when the temperature of the seamless steel pipe reaches 450°C or lower (S5). The cooled seamless steel pipe is quenched (S6). The quenched seamless steel pipe is tempered (S7).
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
B21B 23/00 - Laminage des tubes, non limité à l'un des procédés prévus dans un seul des groupes , p. ex. par procédés combinés
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
45.
EFFICIENT METHOD FOR COLLECTION OF PLATINUM-GROUP ELEMENT FROM COPPER-IRON SCRAP
Disclosed is a means for efficiently collecting a platinum-group element by efficiently enriching the platinum-group element in a molten copper phase produced from a copper-iron scrap containing the platinum-group element. Specifically disclosed is a method comprising: melting a copper-iron scrap containing a platinum-group element to produce a molten material; separating the molten material into two phases, i.e., a molten copper phase containing at least one rare metal selected from the group consisting of Nd, Pr and Dy and a molten iron phase having a carbon concentration of 1 mass% or more, wherein carbon contained in the molten iron phase is derived from a carbon source contained in the molten material; isolating the two phases from each other and collecting the molten copper phase; and separating and collecting the platinum-group element dissolved in the molten copper phase from the molten copper phase. The copper-iron scrap may contain the rare metal. Alternatively, a member containing the rare metal may be added to the molten material. It is preferred that the total concentration of the rare metal contained in the molten copper phase be 1 mass% or more.
Provided is an iron making method whereby carbon dioxide emission is reduced while minimizing influences on the reactions occurring in a current iron making process and on the operation thereof. The iron making method comprises: recovering some or all of carbon dioxide from a carbon dioxide-containing gas discharged from an iron making process for producing reduced iron or pig iron from iron oxide; subjecting the recovered carbon dioxide to reduction reaction in which CO2-free energy is used, for example, electrolysis, thereby yielding oxygen and a carbon source comprising carbon monoxide and/or solid carbon; and using at least some of the yielded carbon source as a reducing material in the iron making process from which the carbon dioxide-containing gas was discharged.
Disclosed is a steel sheet with small welding deformation and excellent corrosion resistance, which is characterized by having a chemical composition containing, in mass%, 0.02-0.25% of C, 0.01-0.7% of Si, 0.3-2% of Mn, 0.05% or less of P, 0.008% or less of S, less than 0.2% of Cu, 1-2.5% of Cr, 0.05% or less of Mo, 0.005-0.1% of Nb, 0.003-0.1% of Al, 0.01% or less of N and 0.03-0.50% of Sn, with the balance made up of Fe and impurities and a Cu/Sn ratio of 1 or less. The steel sheet is also characterized in that the metallic structure thereof is composed of 10-60% of a ferrite structure and 40-90% of a bainite structure and/or a martensite structure, the ferrite structure has an average particle diameter of 30 μm or less, and the ratio of the hardness of the bainite structure and/or the martensite structure to the hardness of the ferrite structure is 1.5 or more. The steel sheet may additionally contain one or more substances selected from among Ti, Ni, V, B, Zr, Ca, Mg and REM.
A flexure member having excellent dimension accuracy by stably forming a high temperature portion uniformly in a circumferential direction of a steel pipe and in a narrow range in an axial direction of the steel pipe by using a manufacturing device disclosed in Document 1. The steel pipe (1) is supported at a first position A while being transferred, the steel pipe (1) is subjected to induction heating at a second position B by an induction heating coil (14), and the steel pipe (1) is cooled at a third position C, thereby forming the high temperature portion (1a) that shifts in the axial direction of the steel pipe (1), changing a position of a grasping mechanism (15) of the steel pipe (1) into a three-dimensional direction in a region D, and giving a bending moment to the high temperature portion (1a), with the result that the flexure member is manufactured. In the case where the thickness of the steel pipe (1) is equal to or less than 2.0 mm, a transfer velocity V of the steel pipe (1) is set to 5 to 150 mm/sec, and an alternating current of 5 to 100 kHz is supplied to the induction heating coil (14) having a number of winding of 1. In the case where the thickness of the steel pipe (1) is more than 2.0 mm and equal to or less than 3.0 mm, the induction heating coil (14) having the number of winding of 2 is used, and a current frequency f (kHz) of the alternating current supplied to the induction heating coil (14) and the transfer velocity V (mm/sec) of the steel pipe (1) are adjusted so that relationships of f < 3000/V and f ≥ 0.08V are satisfied. 5 kHz ≤ f ≤ 100 kHz and 5 mm/sec ≤ V ≤ 150 mm/sec are satisfied.
B21D 7/16 - Équipement auxiliaire, p. ex. pour réchauffer ou refroidir les coudes
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
49.
INDUCTION HEATING COIL, DEVICE FOR MANUFACTURING OF WORKPIECE, AND MANUFACTURING METHOD
Disclosed is an induction heating coil capable of heating a steel tube that is conveyed non-rotationally in the axial direction thereof uniformly in the circumferential direction thereof and stably in a narrow range in the axial direction thereof. An induction heating coil (10), having a configuration that encircles the exterior circumference of a long metallic material (1), which is the object to be heated, in the circumferential direction thereof, comprises two or more coil loops: a first coil loop coil main body (11) and a second coil loop coil main body (12). The coils have an interior circumferential length Ln (the non-efficacious coil length) wherein the number of effective coil loops when the coils are projected in the circumferential direction is less than the total number of coil loops, and the interior circumferential length of the projected coil main body being L0 (the interior circumferential coil length), where Ln/Lo is less than or equal to 0.05; and the coil main body (11) and the coil main body (12) further comprise insulator portions (11b and 12b) upon connection portions thereof, wherein the insulator portions are present in locations separated between 5 and 45 degrees upon the central angles of the coil main bodies.
Provided is a method that can stably mass-produce hot press-molded members with good post-coating corrosion resistance by hot press-molding galvanized steel sheets. A galvanized steel sheet is heat-treated as follows: heating to between 600°C and 750°C, with the rate of temperature increase up to 600°C being at most 50°C/sec, and then cooling to 550°C or less. This yields a steel blank that has an outermost layer of zinc oxide and, underneath that, a zinc-iron alloy phase with an iron content of at least 25% by mass. Said steel blank is heated to at least the Ac3 point, and press molding is begun immediately thereafter, at a temperature greater than or equal to the Ac3 point. Quenching is performed after that, resulting in a hot press-molded member that has a surface layer of zinc oxide and an iron-zinc solid solution phase but does not have either an intermetallic phase or a pure zinc layer.
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
Equal surface pressure is applied and an elastic member is protected. A brake lining for a rolling stock is pressed, by means of a brake caliper, against the sliding surface of a brake disk bolted to an axle or a disk body attached to the axle. The brake lining for a rolling stock is provided with friction members (11) pressed against the sliding surface of the brake disk, and a rear plate (12) which is attached to the brake caliper and which supports the friction members (11). The friction members (11) are separated and disposed on the radial direction and the circumferential direction of the brake disk. A disk spring (13) is placed between the friction members (11) and the rear plate (12). The surface of the friction members (11) which opposes the rear plate (12) is in the shape of a sphere. When pressed lightly, a pressing force is transferred to the friction members (11) from the rear plate (12) via the disk spring (13). When pressed strongly, a pressing force is directly transferred to the friction members (11) as the rear plate (12) and the spherical sections (11a) come into contact. As a consequence, an equal surface pressure is applied, and deformation and degradation of an elastic member can be prevented.
F16D 65/092 - Bandes, sabots ou patinsPivots ou leurs organes de support pour freins à engagement axial, p. ex. freins à disques
B61H 5/00 - Emploi ou aménagements de freins comportant de substantielles surfaces de freinage radiales pressées l'une contre l'autre selon un mouvement axial, p. ex. freins à disques
A reduction gear is provided with: a braking disc which is affixed to a rotating shaft of the vehicle; permanent magnets which are arranged in such a manner that the different magnetic poles are alternately arranged in the circumferential direction so as to face the main surface of the braking disc; a rotating member which holds the permanent magnets, has a switch brake disc, and is rotatably supported by the rotating shaft; a switch brake caliper which has brake pads for sandwiching the switch brake disc and is affixed to a non-rotating part of the vehicle; and an electric linear actuator which is a planetary roller mechanism, the electric linear actuator converting the rotational motion of an electric motor into a rectilinear motion to rectilinearly drive the brake pads. The configuration makes the reduction gear compact and enables the reduction gear to be mounted even on medium- and small-sized vehicles which generally do not have compressed air tank, etc.
A set for obtaining a threaded connection used in hydrocarbon wells, comprising a first tubular component provided with two threaded zones with identical lead, a second tubular component provided with at least two threaded zones, a third tubular component provided on its internal circumferential surface with at least one threaded zone and provided on its external circumferential surface with at least one threaded zone, the set being such that the threaded zone provided on the internal circumferential surface of the third component is capable of cooperating by makeup with one of the two threaded zones of the first component; the threaded zone provided on the external circumferential surface of the third component is capable of cooperating by makeup with one of the two threaded zones of the second component; the second and third components further comprise means for defining the end of makeup of said threaded zones; the other threaded zone provided on the end of the first component is capable of cooperating by makeup with the other threaded zone provided on the second component. A makeup method for obtaining a connection and a method for breaking out said connection.
Disclosed are: a base tube for cold-drawing which can be used in the manufacturing of small diameter, elongated tubes such as heat transfer tubes for use in steam generators in nuclear power facilities, and which does not cause sticking or chatter vibrations during the drawing process; a manufacturing method for the base tube; and a manufacturing method for a cold-drawn tube which is acquired by cold-drawing the base tube. The average surface roughness (Ra) (ANSI B46.1) of the internal surface of a base tube for cold-drawing which is used in an oil-lubricated drawing process before being drawn satisfies the condition: 0.10μm≤Ra≤1.00μm. The average surface roughness (Ra) of a base tube which is used in a high-pressure oil-lubricated drawing process and which is made from an austenitic alloy used particularly in heat transfer tubes for use in steam generators satisfies the condition: 0.10μm≤Ra≤0.50μm.
B21C 9/00 - Refroidissement, chauffage ou lubrification du matériau à étirer
B21C 1/24 - Étirage par des machines ou appareils dans lesquels l'effort de traction est produit par des moyens autres que des tambours, p. ex. par chariot mû longitudinalement tirant ou poussant le matériau de façon à former des tôles, des barres ou des tubes métalliques spécialement adaptés à la fabrication d'objets tubulaires au moyen de mandrins
B24C 1/06 - Méthodes d'utilisation de jet abrasif en vue d'effectuer un travail déterminéUtilisation d'équipements auxiliaires liés à ces méthodes pour réaliser des surfaces mates, p. ex. sur les matériaux plastiques, sur le verre
55.
GALLING-RESISTANT THREADED TUBULAR COMPONENT, AND PROCESS FOR COATING SAID COMPONENT
A galling-resistant threaded tubular component for drilling or operating hydrocarbon wells is described, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, at least a portion of the end (1; 2) being coated with a dry film comprising a fluorourethane matrix. A process for coating said component.
Provided is a negative electrode material for a nonaqueous electrolyte secondary battery. Said negative electrode material is capable of improving the cycle characteristics of a lithium ion secondary battery. Also provided is a method for manufacturing the provided negative electrode material. Said negative electrode material contains at least two types of powdered alloy material. One powdered alloy material (A) contains cobalt, tin, and iron and does not contain titanium. The other powdered alloy material (B) contains iron, titanium, and tin and constitutes between 10% and 30% of the total mass of both powdered alloy materials.
H01M 4/38 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'éléments simples ou d'alliages
B22F 9/04 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau solide, p. ex. par broyage, meulage ou écrasement à la meule
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p. ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
Provided is a member for conveying high-temperature materials, which exhibits excellent build-up resistance, oxidation resistance, and heat crack resistance. Specifically provided is a member for conveying high-temperature materials, which has a coating on the surface of a base metal, said coating being a composite coating formed by a plasma build up spraying method using a mixed powder consisting of both a Co-base alloy powder that comprises, by mass, 0.03 to 0.6% of C, 0.2 to 3% of Si, 22 to 35% of Cr, and more than 50% of Co, and a Cr carbide powder. The member exhibits excellent build-up resistance, particularly in a gaseous atmosphere having a temperature of 1100°C or higher.
C23C 24/10 - Revêtement à partir de poudres inorganiques en utilisant la chaleur ou une pression et la chaleur avec formation d'une phase liquide intermédiaire dans la couche
B23K 9/04 - Soudage pour d'autres buts que l'assemblage de pièces, p. ex. soudage de rechargement
B65G 39/00 - Rouleaux, p. ex. rouleaux d'entraînement, ou leurs aménagements incorporés dans des chemins de roulement ou dans d'autres types de transporteurs mécaniques
C21D 1/00 - Procédés ou dispositifs généraux pour le traitement thermique, p. ex. recuit, durcissement, trempe ou revenu
C22C 19/07 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de cobalt
An inspection device is provided with a camera which captures an image of the entire region of an end surface of a tubular product, a first light source which illuminates the entire circumference of only the outer peripheral edge of the tubular product on the end surface side thereof, a second light source which illuminates the entire circumference of only the inner peripheral edge of the tubular product on the end surface side thereof, and a third light source which illuminates the entire circumference of only the inner peripheral surface of the tubular product on the end surface side thereof. The inspection device captures an image of the tubular product by a camera while illuminating the tubular product by the first light source and the second light source, and calculates the outer diameter and the wall thickness of the tubular product on the basis of the captured image. Also, the inspection device captures an image of the tubular product by the camera while illuminating the tubular product by the third light source, and detects a surface defect on the inner peripheral surface of the tubular product on the basis of the captured image. The configuration makes the device compact, enables the dimensional inspection of the outer diameter and the wall thickness of the tubular product to be accurately performed using the camera, and enables the inspection of the inner surface to be performed.
G01B 11/08 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des diamètres
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces
G01N 21/954 - Inspection de la surface intérieure de corps creux, p. ex. d'alésages
Disclosed is an austenitic heat-resistant alloy, which contains 0.15% or less of C, 2% or less of Si, 3% or less of Mn, 40-60% of Ni, 0.03-25% of Co, 15% or more but less than 28% of Cr, 12% or less of Mo and/or less than 4% of W with the total being 0.1-12%, 0.001-0.1% of Nd, 0.0005-0.006% of B, 0.03% or less of N, 0.03% or less of O, and one or more selected from among 3% or less of Al, 3% or less of Ti and 3% or less of Nb, with the balance made up of Fe and impurities that include 0.03% or less of P and 0.01% or less of S, and which satisfies 1 ≤ 4 × Al + 2 × Ti + Nb ≤ 12 and P + 0.2 × Cr × B < 0.035. The austenitic heat-resistant alloy has both excellent weld cracking resistance and excellent toughness in the HAZ, while exhibiting excellent creep strength at high temperatures. Consequently, the austenitic heat-resistant alloy is suitable for use as a material for high-temperature devices such as a boiler for power generation and a chemical industry plant. The austenitic heat-resistant alloy may contain one or more elements selected from among Ca, Mg, La, Ce, Ta, Hf and Zr in a specific amount.
Disclosed is a hot-rolled steel sheet manufacturing device capable of cooling control of a steel sheet even if a cooling unit capable of cooling from within a finishing rolling mill is disposed. Specifically disclosed is a hot-rolled steel sheet manufacturing device provided with an immediate rapid cooling unit (20) at least part of which is disposed in a final stand of a hot finishing rolling mill line and which can jet cooling water at a high water flow density, a final stand entrance side temperature measurement unit (45) which measures the surface temperature of a steel sheet on the entrance side of the final stand, a steel sheet speed measurement means (47) which measures the speed of the steel sheet on the entrance side of the final stand, a rapid cooling stop temperature prediction unit (51) which calculates the rapid cooling stop predicted temperature on the basis of the measured steel sheet surface temperature and steel sheet speed, and the water supply quantity or water supply pressure of the immediate rapid cooling unit, and an immediate rapid cooling control unit (52) which corrects the water supply quantity or water supply pressure of the immediate rapid cooling unit such that the rapid cooling stop predicted temperature matches a target rapid cooling stop temperature.
B21B 37/76 - Commande du refroidissement sur la table de sortie
B21B 37/00 - Dispositifs ou procédés de commande spécialement adaptés aux laminoirs ou aux produits laminés
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
Disclosed is a hot-rolled steel sheet manufacturing method capable of providing a target temperature for the temperature of a material to be rolled between final stands of a hot finishing rolling mill line even if a cooling unit capable of cooling from within the hot finishing rolling mill line is disposed in a hot-rolled steel sheet manufacturing line. A material to be rolled is rapidly cooled by jetting cooling water to the inside of a final stand on the downstream process side of the final stand of a hot finishing rolling mill line, the entrance side measurement surface temperature of the material to be rolled is acquired on the entrance side of the final stand, and the entrance side target surface temperature in the final stand is calculated from the exit side target surface temperature on the exit side of the final stand on the basis of processing heat generated by rolling by the final stand, a temperature drop due to a contact between a work roll of the final stand and the material to be rolled, and a temperature drop due to air cooling caused by the transfer of the material to be rolled.
B21B 37/76 - Commande du refroidissement sur la table de sortie
B21B 37/00 - Dispositifs ou procédés de commande spécialement adaptés aux laminoirs ou aux produits laminés
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
62.
ASSEMBLY FOR PRODUCING A THREADED CONNECTION, METHOD FOR MAKING UP AND BREAKING OUT SAID CONNECTION AND USE OF SAID CONNECTION IN A WORK OVER RISER
The invention concerns an assembly for producing a threaded connection, comprising a first and a second tubular component with an axis of revolution (4), each being provided at one of its ends (1; 3) with a male threaded zone (10; 30) produced on the external circumferential surface, said ends (1; 3) each finishing in a terminal surface (15; 35) comprising means (14; 34) together forming a direct drive dog clutch device in order to fix the first and second tubular components in rotation, and comprising a third tubular component which also has an axis of revolution (4) and is provided at each of its ends (2, 2') on its internal circumferential surface with two female threaded zones (20, 20'), one of the two male threaded zones (10; 30) being capable of co-operating on makeup with one of the two female threaded zones (20, 20') while the other male threaded zone can co-operate on makeup with the other female threaded zone, characterized in that the male end (1) of the first tubular component as well as the corresponding female end (2) of the third tubular component comprises means for free rotation (11, 21) such that at the end of makeup of said male threaded zone (10) into said female threaded zone (20), the tubular components carrying said male and female threaded zones are freely rotational with res ect to each other.
A threaded connection (1) used in the exploration and operation of hydrocarbon wells comprises a first and a second tubular component, the first component comprising a male end (3) comprising a threaded zone (5) disposed on its external peripheral surface, the second component comprising a female end (2) comprising a threaded zone (4) disposed on its internal peripheral surface, the threaded zone (5) of the male end being threaded up into the threaded zone (4) of the female end, the threaded zones comprising respective male and female threads (40, 50), the threads (40, 50) comprising a root, a crest, a stabbing flank and a load flank, a groove being provided in the load flank of the threaded zone (40) of the female end and/or the male end respectively, adjacent to the root, and a boss being provided which projects axially from the load flank of the threaded zone (50) of the male end and/or respectively from the female end adjacent to the crest, the boss comprising a convex surface and a concave surface, the boss being housed in the groove with, in the connected state, a radial clearance subsisting between the concave surface and the groove and an axial clearance subsisting between the end of the boss and the bottom of the groove.
Provided is a high-toughness, abrasion-resistant, highly-workable steel, the properties of which are not easily influenced by manufacturing conditions. Also provided is a method for manufacturing said steel. The steel is characterized by containing, by mass, 0.15-0.25% carbon, 0.1-1.0% silicon, 0.4-1.3% manganese, at most 0.015% phosphorus, at most 0.005% sulfur, 0.2-0.9% chromium, 0.005-0.03% niobium, 0.005-0.03% titanium, 0.0003-0.004% boron, 0.005-0.08% aluminum, and at most 0.005% nitrogen, with the remainder comprising iron and unavoidable impurities. The provided steel is further characterized by fulfilling relations (1) and (2) and having a Brinell surface hardness between HBW 400 and 500, and may also contain one or more of the following elements: copper, nickel, molybdenum, and vanadium. (1) 0.5 ≤ DI/t ≤ 15.0 (2) Ms ≤ 430 In these relations, t is the thickness of a steel sheet (mm), DI is the hardenability index, and Ms is the martensite start temperature.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C22C 38/32 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du bore
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
65.
STEEL MATERIAL QUALITY DETERMINATION DEVICE AND STEEL MATERIAL QUALITY DETERMINATION METHOD
In order to make it possible to stably and accurately determine whether a steel material is produced from carbon steel or produced from low-alloy steel, provided is a steel material quality determination device characterized by being provided with: an image capturing means (11) which captures, continuously multiple times, images of sparks produced when a steel material (18) is rubbed; a detection means (12) which detects, from each of the captured images (2) captured by the image capturing means, an alloy spark region corresponding to an alloy spark produced by rubbing an alloy component contained in the steel material; a calculation means (13) which calculates the total number of alloy spark regions detected by the detection means; and a determination means (14) which determines that the steel material is produced from low-alloy steel when the calculated total number of alloy spark regions is a first threshold value or more, and determines the steel material is produced from carbon steel when the calculated total number of alloy spark regions is less than the first threshold value.
Disclosed is an austenite stainless steel sheet for springs, which exerts both high strength and excellent moldability, and which has a chemical composition comprising 0.01 to 0.15% of C, 3.0% or less of Si, 3.0% or less of Mn, 10.0 to 30.0% of Cr, 4.0 to 20.0% of Ni, and 0.4% or less of N, the remainder being Fe or impurities, wherein the austenite content (γs) (%) of the surface of the steel sheet and the austenite content (γc) (%) of the plate thickness center is (γs+γc)/2≤55 and γs/γc≥0.1, and the remainder has a metal structure which is mainly a strain-induced martensite structure.
A threaded connection 1 comprising a first and a second tubular component, the first component comprising a male end comprising a distal surface and a threaded zone 5 disposed on its external peripheral surface, the second component comprising a female end comprising a distal surface and a threaded zone 4 disposed on its internal peripheral surface, the threaded zone 5 of the male end being threaded up into the threaded zone 4 of the female end, the threaded zones 4, 5 comprising respective male and female threads 40, 50 having a width which increases from the distal surface, the threads comprising load flanks having negative angles over at least a portion of their radial dimension, and stabbing flanks, with a radial clearance subsisting in the connected state between the crests of the male threads and the roots of the female threads and/or between the crests of the female threads and the roots of the male threads, with an axial clearance subsisting in the connected state between the stabbing flanks of the male and female threads, and the distal surface of the male end and/or female end being brought into axial abutting contact against a corresponding abutment surface.
Disclosed are a device and a method for determining material quality of a steel material capable of stably and accurately discriminating between steel materials composed of high-strength steel to which additives for improving the strength of the steel are added and those composed of ordinary steel to which the additives are not added. Specifically, a device (1) for determining material quality of a steel material detects spark pixels from captured color images (2) of sparks (19) produced when a steel material (18) is rubbed, detects pixels of which density of one of color components for discrimination selected from RGB components is low from the spark pixels as low-density pixels, determines that the steel material is composed of the high-strength steel when a ratio of the total number of the low-density pixels to the total number of the spark pixels is more than or equal to a threshold for discrimination, and determines that the steel material is composed of the ordinary steel when the ratio is less than the threshold for discrimination.
G01N 21/70 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité mécaniquement, p. ex. par triboluminescence
69.
DUPLEX STAINLESS STEEL HAVING EXCELLENT ALKALI RESISTANCE
Disclosed is duplex stainless steel which has excellent alkali resistance, especially corrosion resistance to a high-temperature thick alkali solution and excellent weldability. The duplex stainless steel has a chemical composition that contains, in mass%, 0.03% or less of C, 0.5% or less of Si, 2.0% or less of Mn, 0.04% or less of P, 0.003% or less of S, 25.0% or more but less than 28.0% of Cr, 6.0-10.0% (inclusive) of Ni, 0.2-3.5% (inclusive) of Mo, less than 0.5% of N and 3.0% or less of W, with the balance made up of Fe and unavoidable impurities.
Provided is a continuous casting method for molten metal, wherein a hollow cylindrical, conical or truncated conical refractory structure provided with one or more side holes in the side wall thereof is disposed above an immersion nozzle in a tundish with the axis of the refractory structure disposed vertically, and molten metal is supplied from the tundish into the immersion nozzle. In said continuous casting method for molten metal, the angle formed by a virtual line extending radially from the center of a circular cross-section in the horizontal direction of the refractory structure and the central axis of the side hole is an angle (θ1), the swirling flow of the molten metal supplied into the immersion nozzle is formed by causing the molten metal in the tundish to pass through the side hole, and the flow velocity (Q) of the molten metal, the total opening area (S) of the side hole, the mean internal radius (R) of the circular cross-section in the horizontal direction in a portion in which the side hole is bored, and the angle (θ1) satisfy 0.015m2/s≤R×Q/S×Sinθ1≤0.100m2/s. By providing a swirling flow imparting mechanism in the tundish, the flow of the molten metal in a mold can be stabilized.
Disclosed is a hot-rolled steel bar or wire rod which contains 0.1-0.3% C, 0.05-1.5% Si, 0.4-2.0% Mn, 0.003-0.05% S, 0.5-3.0% Cr, 0.02-0.05% Al, and 0.010-0.025% N, the remainder comprising Fe and impurities, the impurities having P, Ti, and O contents satisfying P≤0.025%, Ti≤0.003%, and O≤0.002%, and which has a structure constituted of ferrite-pearlite, ferrite-pearlite-bainite, or ferrite-bainite. When 15 fields of view randomly selected in a cross-section so that each field of view has an area of 62,500 µm2 are examined, the standard deviation of ferrite content is 0.10 or less. In the region from the periphery of the cross-section to 1/5 the radius and in the region from the center of the cross-section to 1/5 the radius, the amount of Al which has precipitated as AlN is 0.005% or less and the population of AlN grains having a diameter of 100 nm or larger is not more than 5 per 100 µm2. Even when the steel bar or wire rod is hot-forged in various temperature ranges, the austenite grains can be stably prevented from enlarging during heating for carburizing.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/60 - Alliages ferreux, p. ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
C21D 8/06 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de barres ou de fils
72.
ACIDITY ALLEVIATION TECHNIQUE USING CONVERTER SLAG
It has been considered that, in an artificial forest typified by a cedar forest or a Japanese cypress forest, forest functions can be restored by reducing the stand density therein through forest maintenance operations such as thinning and pruning so as to assure an adequate light intensity in the forest. However, an artificial forest with an excessive planting density is kept at a low light intensity over a long period of time and, therefore, has a number of sites where vegetation cannot be restored due to the marked progress of soil acidification. In a strongly acidic site having special soil such as acidic sulfate soil where the soil pH significantly decreases, the soil environment cannot be improved merely by leaving untreated. An acidity alleviation method using converter slag, comprising, in a strongly acidic soil site, where the soil pH has markedly decreased, to be treated, spraying a soil dressing, which is prepared by blending converter slag that is obtained in the course of producing steel with an organic material or the like, to the soil surface to be treated using a vegetation matrix-spraying machine to thereby improve the structure of the soil that has been dysfunctional because of the marked decrease in the soil pH.
The disclosed reduction gear can be made more compact and can be introduced even in small to medium sized vehicles that do not have a specially installed pressurized air tank or the like by means of being provided with a control disc affixed to the rotary shaft of a vehicle; permanent magnets disposed facing a primary surface of the control disc and disposed with alternating polarity around the circumferential direction; a rotating member that is supported rotatably on the rotary shaft, holds the permanent magnets, and has a switch brake disc; a switch brake caliper that is affixed to a non-rotating section of the vehicle and that has brake pads that sandwich the switch brake disc therebetween; and an electric linear actuator that converts the rotary motion of the electric motor into linear motion, driving the brake pads linearly.
Disclosed is a method of accurately measuring the surface shape and the flatness of a plate even when an image capturing means is disposed at a position where the means can receive specularly reflected light of a light and dark pattern projected onto a surface of a plate with a high specular reflectivity. In the method, a staggered pattern in which light portions with predetermined set pitches are arranged in the longitudinal direction and in the transverse direction in a staggered manner is used as a light and dark pattern to be projected onto the surface of the plate. A shape measurement line extending along the longitudinal direction of the staggered pattern is set in a pattern image acquired by the image capturing means, and concentrations of pixels located on straight lines that extend in the transverse direction of the staggered pattern while passing through pixels on the shape measurement line and that have a length twice or more the set pitch of the light portions in the transverse direction are averaged so that average pixel concentrations are calculated. The surface shape of the plate is calculated on the basis of the average pixel concentration distribution along the shape measurement line, and the flatness of the plate is calculated on the basis of the calculated surface shape.
G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
75.
RETRACT MANDREL MILL AND METHOD FOR ROLLING TUBING
Disclosed are a retract mandrel mill and a method for rolling tubing using the mandrel mill. The retract mandrel mill is provided with a mandrel mill and an extractor. The mandrel mill includes a mandrel bar and is for rolling a tubing wherein the mandrel bar has been inserted. The extractor is for extracting the mandrel bar from the tubing which has been rolled by the mandrel mill. The distance between the mandrel mill and the extractor is adjustable, thus it is not necessary to increase the length of the tubing to be stretch rolled, even when rolling unusually short tubing, and wear to the mandrel bar can be limited, enabling efficient and good-yield rolling.
B21B 17/04 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" avec un mandrin selon un processus continu
A galling-resistant threaded tubular component for drilling or operating hydrocarbon wells has at one of its ends (1; 2) a threaded zone (3; 4) produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, with at least one portion of the threaded zone (3; 4) being coated with a dry film with a crystalline structure with a high specific surface area principally constituted by one or more mineral salts which are not reactive towards metals. It also concerns a process for coating such a component using a dry mineral film with a crystalline structure having a high specific surface area principally constituted by one or more mineral salts which are not reactive towards metals.
Disclosed are: a mandrel mill provided with a plurality of rolling stands, in which the rolling stands are provided with three grooved rolls, the three grooved rolls constitute a groove by the rolled surfaces, and when the diameter of the groove bottoms of the grooved rolls is defined as DR, the distance from the center of the groove to the groove bottoms of the grooved rolls is defined as DC/2, and the roll diameter ratio is defined as DR/DC, the set value of the roll diameter ratio DR/DC is not more than 3.7, and the set value thereof is desirably not more than 3.4; and a method for manufacturing a seamless pipe including a process for stretching and rolling a pipe material by the mandrel mill. Controlling the set value of the roll diameter ratio DR/DC in any of the rolling stands makes it possible to suppress the occurrence of overfill during the stretching and rolling of the pipe material.
B21B 17/02 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" avec un mandrin
A multi-roll mandrel mill in which "roll chock sections have been made compact" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality of rolling stands in which backup rolls for driving the plurality of grooved roll bodies are arranged, respectively, and is characterized in that bearings are stored in the inside of the grooved roll bodies. A multi-roll mandrel mill in which "design of setup-specific roll chock sections or the like has been made appropriate" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality of rolling stands in which roll axes and roll chock sections for driving the plurality of grooved roll bodies are arranged, respectively, and is characterized in that at least one of the roll axes or the roll chock sections in addition to the grooved roll bodies is replaced with different-shaped components according to the pipe making setup of the mandrel mill. Both are effective stretching and rolling devices for preventing underfill or overfill.
B21B 17/02 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" avec un mandrin
A screw joint for a steel pipe, having improved galling resistance, wherein the screw joint comprises: a pin which is provided with a male thread section having a triangular screw thread; and a box which is provided with a female thread section having a triangular screw thread and engaging with the male thread section, and also with a threadless sleeve section provided to the tip of the box, and wherein the screw joint satisfies the requirements of the standard for round screw joints set forth by the American Petroleum Institute. The threadless sleeve section of the box is reduced in length or eliminated so that the length of the threadless sleeve section in the axis direction of the box is less than or equal to 1/2 (including zero) the value defined in the standard. A swoosh section may be provided to the box end and/or the shape of the box which is defined in the standard may be changed so that the bevel angle at the end of the female thread section is within the range of ±15˚ of the slope angle of the female thread.
Disclosed is an Ni-based alloy material which has a chemical composition containing 0.03% or less of C, 0.01-0.5% of Si, 0.01-1.0% of Mn, 0.03% or less of P, 0.01% or less of S, 20% or more but less than 30% of Cr, more than 40% but 50% or less of Ni, more than 2.0% but 5.0% or less of Cu, 4.0-10% of Mo, 0.005-0.5% of Al, 0.1-10% of W, more than 0.10% but 0.35% or less of N, and if necessary, either 0.01% or less of Ca and/or 0.01% or less of Mg, with the balance made up of Fe and unavoidable impurities, while satisfying the following formula: 0.5Cu + Mo ≥ 6.5. The Ni-based alloy material has a Vickers hardness at 500˚C of 350 or more in the surface. The Ni-based alloy material has excellent erosion resistance and corrosion resistance as excellent as those of Ni-based alloys having a high Mo content such as Hastelloy C22 and Hastelloy C276 in a harsh environment in which erosion, hydrochloric acid corrosion and sulfuric acid corrosion occur at a temperature of 100-500˚C.
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
C22F 1/00 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid
C22F 1/10 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du nickel ou du cobalt ou de leurs alliages
81.
Ni-BASED ALLOY PRODUCT AND PROCESS FOR PRODUCTION THEREOF
A heat-resistant and pressure-resistant Ni-based alloy product particularly suitable as a large-size product, and characterized by having a composition comprising (in mass%) 0.03 to 0.10% of C, 0.05 to 1.0% of Si, 0.1 to 1.5% of Mn, 0.0005 to 0.04% of sol. Al, 20 to 30% of Fe, not less than 21.0% and less than 25.0% of Cr, more than 6.0% and not more than 9.0% of W, 0.05 to 0.2% of Ti, 0.05 to 0.35% of Nb, and 0.0005 to 0.006% of B, with the remainder being Ni and impurities, wherein 0.03% or less of P, 0.01% or less of S, less than 0.010% of N, less than 0.5% of Mo and 0.8% or less of Co are contained as the impurities, and the effective B content (Beff) as defined by formula (1) is 0.0050 to 0.0300%, and wherein the breaking elongation in a tensile test at a strain rate of 10-6/sec and a temperature of 700˚C is 20% or more; and a process for producing the Ni-based alloy product. Beff (%) = B-(11/14)×N+(11/48)×Ti …(1)
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
B21J 5/00 - Méthodes pour forger, marteler ou presserÉquipement ou accessoires particuliers
C22F 1/10 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du nickel ou du cobalt ou de leurs alliages
C22F 1/00 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid
Disclosed is a two-phase stainless steel which has outstanding weldability during high heat input welding and excellent stress corrosion cracking resistance in a chloride environment containing corrosive gas. The two-phase stainless steel satisfies the relationship between formula (1) and formula (2) and has a chemical composition which comprises C: 0.03 mass% or less, Si: 0.2 mass% to 1 mass%, Mn: 5.0 mass% or less, P: 0.040 mass% or less, S: 0.010 mass% or less, sol. Al: 0.040 mass% or less, Ni: 4 mass% to 8 mass%, Cr: 20 mass% to 28 mass%, Mo: 0.5 mass% to 2.0 mass%, Cu: over 2.0 mass% but no more than 4.0 mass%, N: 0.1 mass% to 0.35 mass%, with the remainder being Fe and impurities. In addition, the two-phase stainless steel may contain one or more of V, Ca, Mg, B, and rare earth elements instead of some of the Fe. In formulae (1) and (2), each element symbol represents the content of each element in the steel (unit: mass%). (1) 2.2Cr + 7Mo + 3Cu > 66 (2) Cr + 11Mo + 10Ni < 12 (Cu + 30N)
Disclosed is a process for producing a carbonitrided member using a base steel material comprising (in mass%) 0.10 to 0.35% of C, 0.15 to 1.0% of Si, 0.30 to 1.0% of Mn, 0.40 to 2.0% of Cr, 0.05% or less of S, and optionally 0.50% or less of Mo, with the remainder being Fe and impurities. The process comprises carburizing the base steel material by retaining the base steel material in a carburizing atmosphere at a temperature of 900 to 950˚C, carbonitriding the resulting product by retaining the resulting product in a carbonitriding atmosphere having a nitrogen potential of 0.2 to 0.6% at a temperature of 800 to 900°C, quenching the carbonitrided product, and subjecting the quenched product to a shot peening treatment. The process enables the production of a carbonitided member having excellent abrasion resistance, high pitting strength and excellent flexural fatigue strength even when an inexpensive steel having a low Mo content or containing no Mo is used as a base material. After the quenching, the quenched product may be subjected to the shot peening treatment while heating the quenched product at a temperature of 350°C or lower or immediately after heating the quenched product at a temperature of 350°C or lower. After the quenching, the quenched product may be annealed at a temperature ranging from higher than 250°C and not higher than 350°C and subsequently subjecting the annealed product to the shot peening treatment.
C21D 1/76 - Réglage de la composition de l'atmosphère
C21D 7/06 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à froid de la surface par grenaillage ou similaire
C21D 9/32 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour roues d'engrenage, roues hélicoïdales, ou équivalent
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/60 - Alliages ferreux, p. ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
A protector configured in such a manner that, when mounted to a pin or a box of a threaded joint for a pipe with at least one of the pin or the box lubricated with a solid lubricating coating, the protector prevents damage to the solid lubricating coating on a screw thread section of the threaded joint. The protector is a tubular body provided with a screw thread section formed on the inner peripheral surface or the outer peripheral surface of the tubular body. The screw thread section of the protector engages with at least a part of a screw thread section provided to the pin or the box to be protected, and preferably the screw thread section of the protector engages with three to five perfect screw threads. The height (H1) of the screw thread section of the protector and the height (H2) of the perfect screw thread of the pin or the box to which the protector is mounted satisfy the relationship of H1 > H2, and the difference between H1 and H2 (= H1 - H2) is greater than the maximum thickness, measured at the screw thread crest, of the solid lubricating coating which covers the screw thread section of the pin or the box.
Disclosed is an SiC single crystal wafer on which a good-quality epitaxial film having reduced defects originated from a wafer can be grown. The SiC single crystal wafer has a surface-modified layer having a thickness of 50 nm or less and an SiC single crystal part having an oxygen content of 1.0 × 1017 atoms/cm3 or less. The SiC single crystal wafer is produced from high-purity SiC bulk single crystals which are produced by a solution growth method using a raw material having an oxygen content of 100 ppm or less and employing a non-oxidative atmosphere having an oxygen concentration of 100 ppm or less.
C30B 19/04 - Croissance d'une couche épitaxiale à partir de la phase liquide en utilisant des solvants fondus, p. ex. des fondants le solvant étant un constituant du cristal
H01L 21/02 - Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
86.
BENT MEMBER, AND DEVICE AND METHOD FOR MANUFACTURING SAME
Provided are a bent member having a bend having a minute bend radius which is, for example, not more than 1 to 5 times the thickness of the member, and a device and a method for manufacturing the bent member. A first support means (11) disposed at a first position (A) supports a rectangular pipe (16) while feeding the rectangular pipe (16) in the longitudinal direction, a heating means (12) disposed at a second position (B) partially heats the rectangular pipe (16), and a cooling means (13) disposed at a third position (C) cools the rectangular pipe (16). When working the rectangular pipe (16), a shear force application means (14) which is disposed in a downstream region (D) is moved two-dimensionally or three-dimensionally in two directions at the same time, the two directions being the feeding direction of the rectangular pipe (16) and the direction substantially parallel to one lateral cross-section of the rectangular pipe (16), said lateral cross-section being located at a position in the longitudinal direction and being that which is heated by the heating means (12). By doing so, a shear force is applied to the heated portion of the rectangular pipe (16), and as a result, a bent member (21) is manufactured.
When quenching and tempering heat treatments are performed on a steel pipe that has undergone a pipe forming process by thermal processing and has a wall thickness exceeding 30 mm, the following processes are sequentially performed: (a) a quenching process in which, in the temperature range of at least 750 ˚C or more at a heating stage, the steel pipe is heated to a temperature of 900 1000 ˚C inclusive, using induction heating at a frequency of 200 Hz or less as a heating means, and then is quenched by water-cooling; and (b) a tempering process in which the steel pipe is tempered at a temperature of 500 750 ˚C inclusive. This makes it possible to perform uniform and high-speed heating in the quenching process, reduce the size of crystal grains, and therefore obtain a thick-walled seamless steel pipe with good toughness. In the quenching process (a), after heating by the induction heating, it is preferable to further perform a uniform heat treatment in the temperature range of 900 1000 ˚C inclusive for 10 minutes or less and then perform quenching by water-cooling.
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C21D 1/10 - Durcissement de surface par application directe d'énergie électrique ou ondulatoireDurcissement de surface par radiation particulaire par induction électrique
C21D 1/18 - DurcissementTrempe avec ou sans revenu ultérieur
88.
APPARATUS FOR ADJUSTING SCREW-DOWN POSITION OF MILL ROLL WHICH CONSTITUTES THREE-ROLL TYPE MANDREL MILL, AND METHOD FOR MANUFACTURING SEAMLESS PIPE
Provided is an apparatus for adjusting a screw-down position by which an engagement failure of a leading end of a tubular member which is rolled by a three-roll type mandrel mill, or the like can be prevented. An apparatus (100) for adjusting screw-down positions of mill rolls (R1 to R6) which constitute a three-roll type mandrel mill is provided with screw-down devices (1) (P1 to P6) which move the mill rolls (R1 to R6) in the screw-down direction and a controller (2) which controls the screw-down devices (1). Immediately after the commencement of the rolling operation for the leading end of the tubular member (T) by the mill rolls, among the mill rolls (R1 to R6), arranged in at least one rolling stand, the controller (2) controls the corresponding screw-down device (1) to move those mill rolls in a closing direction. Preferably, the controller (2) causes the screw-down device (1) to move the mill rolls arranged in at least one rolling stand, among the mill rolls (R1 to R6) in the closing direction at a speed of 16 mm/sec or higher.
B21B 17/02 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" avec un mandrin
89.
PLUG FOR EXPANDING END OF METAL PIPE, METHOD FOR EXPANDING PIPE USING PLUG, AND METHOD FOR MANUFACTURING METAL PIPE
Provided is a plug (30) which is capable of reducing irregularities in the inner diameter at a frontmost end portion of an end of a metal pipe in the vicinity of an opening. The plug is provided with a taper portion (301) and a cylindrical portion (302) continuous therewith. The diameter of a tapered surface (301S) gradually increases from the front end of the plug toward the rear end. The tapered surface (301S) includes a contact surface portion (CS), a terminal point surface portion (ES), and a start point surface portion (OS). The contact surface portion (CS) has a diameter identical to the inside diameter of the metal pipe before the metal pipe is expanded. The contact surface portion further has a taper angle of 1.0 to 3.0°. The terminal point surface portion (ES) is located at the rear end of the tapered surface (301S) and has a diameter of D1. The start point surface portion (OS) is located between the contact surface portion (CS) and the terminal point surface portion (ES) and has a diameter of D2 = D1 x 0.99. The axial distance LR between the start point surface portion (OS) and the terminal point surface portion (ES) satisfies the expression (1). 22≤LR/((D1 – D2)/2)≤115 (1)
Provided are a manufacturing apparatus with high drainability for a hot-rolled steel plate and a manufacturing method for a steel plate, in a hot-rolled steel plate production line. In a manufacturing apparatus for a hot-rolled steel plate, a last stand thereof has a pair of raised portions in a housing, and a cooling device has a plurality of upper surface cooling nozzle arrays which are arranged in a transfer direction and which inject a cooling water onto an upper surface of a steel plate, a plurality of lower surface cooling nozzle arrays which are arranged along the transfer direction and which inject the cooling water onto the lower surface of the steel plate, and an upper surface guide on the upper surface side of the steel plate. The end of the cooling device on the last stand side is arranged between the raised portions. When the uniform cooling width is (W), the average gap distance between the ends of the uniform cooling width and the raised portions is (Wsw), the gravitational acceleration is (g), the average water rate density at the uniform cooling width is (Qq), and the value determined from (Wsw) and the average distance (h) between the upper surface guide and the upper surface of the steel plate is (C), a predetermined relationship is satisfied.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
A bending device comprising: (a) a first manipulator for constituting a feeding means (22) which is disposed at a first position and feeds a hollow metallic material (25) in the longitudinal direction thereof, said metallic material (25) having a closed cross-section; (b) a second manipulator for supporting both a heating means (23) and a cooling means, the heating means (23) being disposed at a second position downstream of the first position in the feeding direction of the metallic material and heating a part of or the whole metallic material being fed, the cooling means being disposed at a third position downstream of the second position and cooling the portion of the metallic material being fed, said portion being that which is heated by the heating means; and (c) a third manipulator for constituting a second support means (24) which is disposed at a fourth position downstream of the third position and bends the metallic material being fed, the bending of metallic material being fed being performed in such a manner that, while supporting at least one part of the metallic material and moving in a two-dimensional or three-dimensional direction, the second support means (24) applies bending moment to the heated portion of the metallic material.
A mold flux for continuous casting contains SiO2, T.CaO, Al2O3, and MgO as main components, and contains one or more alkali metal oxides, and further contains a component F, wherein the ratio of the content of T.CaO to that of SiO2 is from 0.7 to 2.0, the content of Al2O3 is 35% or less, the content of MgO is 20% or less, the content of the total alkali metal oxides is 8% or less, and the content of F is 7% or less, and the respective content ratios represented by Formulae (b) to (e) satisfy Formula (a): 0.63+2.51×YAl2O3 ≤ YCaO/YSiO2 ≤ 1.23+2.51×YAl2O3 (a); YSiO2 = XSiO2/(XSiO2+XCaO+XAl2O3+XMgO) (b); YCaO = XCaO/(XSiO2+XCaO+XAl2O3+XMgO) (c); YAl2O3 = XAl2O3/(XSiO2+XCaO+XAl2O3+XMgO) (d); and YMgO = XMgO/(XSiO2+XCaO+XAl2O3+XMgO) (e). By performing continuous casting of round billets using the mold flux having this configuration, the occurrence of blowhole defects and longitudinal cracks can be effectively prevented.
In a hot-rolled steel sheet manufacturing line, provided are a cooling device excellent in discharging water, a manufacturing device for a hot-rolled steel sheet, and a manufacturing method for a steel sheet. The cooling device for a steel sheet is disposed on the downstream process side of the final stand in a hot finish rolling machine line and includes a plurality of cooling nozzles provided so as to be able to cool a steel sheet conveyed on a conveyance roller. The cooling nozzles are provided at positions located on the upper and lower surface sides of a region through which a steel sheet passes and are enabled to eject cooling water toward the region through which the steel sheet passes. The cooling device has a rectifying means provided so as to be able to rectify the discharge of cooling water that is ejected from the cooling nozzles toward a position located outside the width of uniform cooling by the cooling nozzles in the sheet width direction of a steel sheet.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
Provided are a cooling device, a cooling method, a manufacturing device, and a manufacturing method for a hot-rolled steel sheet, which are capable of manufacturing a hot-rolled steel sheet having ultra-fine crystal grains. The cooling device for a hot-rolled steel sheet is configured so that when the steel sheet conveyance direction length of the interval from the press-down point in the final stand to the exit side of a housing post is denoted by L1, the steel sheet conveyance direction length of a portion in the interval, where high-pressure jet water is continuously ejected toward a steel sheet, is denoted by L2, and the ratio L2/L1 is denoted by X, a steel sheet conveyance direction average value (Ps [kPa]) of the steel sheet surface collision pressure of the high-pressure jet water in the portion having the length L2 satisfies the relationship Ps > 2.5X(-1/0.6) at the upper and lower surfaces of the steel sheet. The cooling method uses the cooling device. The manufacturing device for a hot-rolled steel sheet includes the final stand in a hot finish rolling machine line and the cooling device in this order in the steel sheet conveyance direction. The manufacturing method for a hot-rolled steel sheet includes a step of processing, using the manufacturing device, a steel sheet rolled at the final stand in the hot finish rolling machine line.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
95.
COOLING DEVICE FOR STEEL SHEET, AND MANUFACTURING DEVICE AND MANUFACTURING METHOD FOR HOT-ROLLED STEEL SHEET
In a hot-rolled steel sheet manufacturing line, provided is a cooling device for a steel sheet, which is excellent in discharging water without blocking the movement of a steel sheet or the sheet passage, and also provided are a manufacturing device and a manufacturing method for a hot-rolled steel sheet. The cooling device (20) for a steel sheet is disposed on the downstream process side of the final stand (11g) of a hot finish rolling machine (10) and includes a plurality of cooling nozzles (21c, 22c) provided so as to be able to cool a steel sheet (1) conveyed on a conveyance roller (12). The cooling nozzles are provided on the upper and lower surface sides of a region through which a steel sheet passes and are enabled to eject cooling water toward the region through which the steel sheet passes. A lower surface guide (40) is provided on the lower surface side and has an inflow opening (42) through which cooling water ejected from the cooling nozzles located on the lower surface side passes and an outflow opening (43) through which cooling water dropped downward passes so as to be able to be discharged. The inflow and outflow openings are alternately disposed in the moving direction of the steel sheet.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
96.
COOLING DEVICE, COOLING METHOD, MANUFACTURING DEVICE, AND MANUFACTURING METHOD FOR HOT-ROLLED STEEL SHEET
Provided are a cooling device for a hot-rolled steel sheet, a cooling method for a hot-rolled steel sheet, a manufacturing device for a hot-rolled steel sheet, and a manufacturing method for a hot-rolled steel sheet, which are capable of manufacturing a hot-rolled steel sheet having ultra-fine crystal grains and of increasing the usage efficiency of cooling water. The cooling device for a hot-rolled steel sheet, when an average cooling speed of the steel sheet surface present within a position equivalent of the radius of a work roll at the final stand is denoted by V1, an average cooling speed of the steel sheet surface present between the position equivalent of the radius of the work roll and the exit side of a housing post at the final stand is denoted by V2, and an average cooling speed of the steel sheet surface present between a cooling start point and the exit side of the housing post is denoted by Vm, satisfies the relationships V1 > V2 and Vm > 400 °C/s. The cooling method for a hot-rolled steel sheet uses the cooling device. The manufacturing device for a hot-rolled steel sheet includes the final stand in a hot finish rolling machine line and the cooling device. The manufacturing method for a hot-rolled steel sheet includes a step of processing, using the manufacturing device, a steel sheet rolled at the final stand in the hot finish rolling machine line.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
97.
METHOD FOR SEPARATING AND RECOVERING ELEMENTS COEXISTING IN SCRAP IRON
Disclosed is a method for efficiently and economically separating and recovering elements, such as copper, that coexist in scrap iron, wherein scrap iron is melted and the molten product of scrap iron obtained is brought into contact with molten Ag. Thus elements which coexist in the scrap iron move to the molten Ag due to the partition equilibrium between the scrap iron molten product and the molten Ag and are removed by oxidation. It is preferable the scrap iron molten product contains C and more preferable said molten product is saturated with dissolved C.
C22B 9/10 - Procédés généraux d'affinage ou de refusion des métauxAppareils pour la refusion des métaux sous laitier électroconducteur ou à l'arc avec des agents d'affinage ou fondantsEmploi de substances pour ces procédés
C22B 7/00 - Mise en œuvre de matériaux autres que des minerais, p. ex. des rognures, pour produire des métaux non ferreux ou leurs composés
C22B 9/02 - Affinage par liquation, filtration, centrifugation, distillation ou action d'ultrasons
A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.
Provided is a carburized component having excellent fatigue strength in the "low-to-mid-cycle regime." Said carburized component comprises a steel having a chemical composition as follows: the base steel contains 0.15–0.25% carbon, 0.03–0.50% silicon, more than 0.60% and up to 1.5% manganese, no more than 0.015% phosphorus, 0.006–0.030% sulfur, 0.05–2.0% chromium, no more than 0.10% aluminum, no more than 0.03% nitrogen, and no more than 0.0020% oxygen; the steel also contains specific amounts of molybdenum, copper, nickel, boron, titanium, niobium, and/or vanadium as necessary; and the remainder comprises iron and impurities. The surface hardened layer of the carburized component fulfills the following conditions: (a) the mean carbon concentration up to a depth of 0.2 mm from the outermost surface is between 0.35% and 0.60%; (b) the surface roughness Rz is at most 15 μm; and (c) the compressive residual stress at the outermost surface of the component is no more than −800 MPa, the compressive residual stress 100 μm from the outermost surface of the component is no more than −800 MPa, and Ir is at least 80,000, where Ir is the integral of σr(y) dy from 0 to 100, y being the depth in μm from the outermost surface of the component up to a depth of 100 μm and σr(y) being the residual stress at a depth y.
C21D 7/06 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à froid de la surface par grenaillage ou similaire
C21D 9/28 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour arbres lisses
C21D 9/32 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour roues d'engrenage, roues hélicoïdales, ou équivalent
C21D 9/40 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour anneauxTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour roulements de paliers
C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
C23C 8/22 - Carburation de la couche superficielle de matériaux ferreux
Provided is a bending device for manufacturing a steel bent member with high productivity and high dimensional accuracy. A bending device (10) provided with: a first support mechanism (11) for supporting a steel pipe (17) while feeding the steel pipe; a heating mechanism (13) for heating a part of or the whole of the steel pipe (17); a cooling mechanism (14) for forming a high-temperature portion in a part of the steel pipe (17) by cooling the portion of the steel pipe (17) which is heated by the heating mechanism (13); a second support mechanism (15) for bending the steel pipe (17) in a desired form by applying bending moment to the high-temperature portion by moving the steel pipe (17) in the two-dimensional or three-dimensional direction while supporting at least one portion of the steel pipe (17); and a deformation prevention mechanism (16) for preventing the steel pipe (17) from being deformed. Either the second support mechanism (15) and/or the deformation prevention mechanism (16) is provided with a chuck which has a tubular body having a circular, polygonal, or irregularly shaped lateral cross-section and grips the steel pipe (17).
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