ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhang, Yu
Li, Zhanwei
Abrégé
Disclosed are a wire rod for a fastener and a production method for the wire rod, and a fastener and a production method therefor. The wire rod and the fastener comprise the following chemical components in percentage by mass: C: 0.25-0.45%; Si: 0.15-0.50%; Mn: 0.5-0.8%; P: ≤0.015%; S: ≤0.005%; Cr: 5-12%; Ni: 2.0-4.5%; Cu: ≤0.1%; Ti: 0.05-0.10%; Mo: 0.25-0.50%; Re: 0.01-0.10%; Al: 0.015-0.050%; O: ≤0.001%; N: ≤0.005%; at least one of B, Nb, and V; and the balance being Fe and inevitable impurities, wherein [B]+[Nb]+[V]≤0.15%, [Cr]/[Ni] is 2.0-3.5, and [Mo]/[Ti] is 4-6.
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhao, Fu
Zhang, Yu
Wang, Na
Abrégé
Disclosed in the present invention are a large-thickness steel plate suitable for superhigh-heat-input welding and a production method therefor. The steel plate comprises: C: 0.06-0.11%, Si: 0.15-0.35%, Mn: 1.4-1.8%, Cr: 0.1-0.5%, Ni: 0.3-0.8%, P<0.015%, S<0.015%, Ti: 0.02-0.05%, and Ti+Zr: 0.025-0.15%, with the balance being iron and impurities.
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
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
3.
CORROSION FATIGUE-RESISTANT SPRING STEEL WIRE, AND WIRE ROD AND PRODUCTION METHOD THEREFOR
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhang, Yu
Zhou, Yun
Sun, Guocai
Abrégé
Disclosed in the present invention are a corrosion fatigue-resistant spring steel wire, and a wire rod and a production method therefor. The wire rod and the steel wire each comprise the following chemical components in percentage by mass: C: 0.2-0.7%, Si: 0.8-1.6%, Mn: 0.5-1.7%, Al: 0.35-0.85%, Nb: 0.1-0.5%, Cr: 0.5-1.0%, Mo: 0.1-0.4%, P: 0.02% or less, S: 0.02% or less, and the balance of Fe and inevitable impurities.
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
C22C 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
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
C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
C22C 38/34 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de silicium
Method for producing steel strip used in twin-roll continuous casting machine, involves hot rolling steel strip having cooled edges in hot rolling mill and reducing thickness of steel strip, cooling steel strip in cooling station, and winding steel strip on a coiler.
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhang, Yu
Zhao, Fu
Wang, Na
Abrégé
The present invention relates to the technical field of alloys. Provided are a steel plate and a production method therefor. The steel plate adopts a corrosion-resistant alloying component system with compound addition of Ce+Sn+Cu. The addition of Ce can improve the corrosion resistance of the steel plate, and Ce is easy to combine with oxygen to generate a spherical oxide; and the steel plate has the capacity of inducing acicular ferrite nucleation in crystals, thereby improving the welding performance of the steel plate. On the basis of the comprehensive design of chemical components, by means of accurate control over process parameters of a rolling and cooling process, a super-large-heat-input steel plate, which is resistant to marine atmospheric corrosion and has good comprehensive performance, is obtained.
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
B23P 15/00 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du 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
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
C21C 7/00 - Traitement à l'état liquide des alliages ferreux, p. ex. des aciers, non couverts par les groupes
B21B 3/00 - Laminage des matériaux faits d'alliages particuliers dans la mesure où la nature de l'alliage exige ou permet l'emploi de méthodes ou de séquences particulières
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
6.
MANUFACTURING METHOD FOR NON-ORIENTED SILICON STEEL SHEET
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
Inventeur(s)
Wu, Shengjie
Ma, Han
Yue, Chongxiang
Qian, Hongwei
Abrégé
222S, the temperature is maintained at 950-1000℃, and the temperature is maintained for15-30 min; and a single-layer non-oriented silicon steel finished product having a thickness of 0.15-0.30 mm is manufactured without normalizing.
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 1/38 - 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 feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
7.
DEVICE AND METHOD FOR CARBON SEQUESTRATION OF STEEL SLAG
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Mao, Rui
Zhu, Zuoqiao
Wang, Fei
Li, Tao
Abrégé
The present application relates to the field of resource utilization of industrial waste, and specifically relates to a device and method for carbon sequestration of steel slag. The device for carbon sequestration of steel slag comprises a device body, and a sprayer and a vent, which are arranged at the top of the structure of the device body, wherein the device body is further provided with a feeding port, a discharging port and an air intake port, a conveying unit is arranged in the device body, and the conveying unit comprises a plurality of conveying mechanisms. The device can introduce industrial waste gas containing carbon dioxide into steel slag under the condition that the ambient humidity is maintained at 80-100%, thereby achieving carbon sequestration of the steel slag. In the present application, by controlling the ambient humidity, maintaining the moisture content of the steel slag during the process of a reaction of same with carbon dioxide and reducing the contact time of water and the steel slag at the same time, calcium in the steel slag is prevented from being dissolved out, and a water film is not formed on the surface of the steel slag to affect the reaction of carbon dioxide with free calcium oxide in the steel slag, thereby enabling a further reaction between carbon dioxide and free calcium oxide.
C04B 5/06 - Ingrédients, autres que l'eau, ajoutés aux scories fonduesTraitement par des gaz ou par des composés produisant des gaz, p. ex. pour obtenir une scorie poreuse
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
Jiangsu Shagang Group Co., Ltd. (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO., LTD (Chine)
Inventeur(s)
Yue, Chongxiang
Qian, Hongwei
Wu, Shengjie
Zhan, Dongfang
Abrégé
A non-oriented silicon steel for driving motors of new energy vehicles and a production method thereof. The silicon steel is produced sequentially by steel smelting, continuous casting, hot rolling, normalizing, acid washing, single stand cold rolling without pre-heating, annealing, cooling, coating, and finishing. During steel smelting, no Cu, Cr, Ni, Nb, V, and Ti are added. The silicon steel comprises the following chemical ingredients: Si: 2.95%-3.15%, Al: 0.75%-0.95%, Si+2Al: 4.6%-4.9%, Mn: 0.5%-0.7%, Sn: 0.03%-0.04%, C≤0.0025%, with the balance being iron, wherein Mn/S≥380, and Al/N≥200. In the present application, the strength is improved while the magnetic performance is ensured, to solve the problem in the prior art that the magnetic performance and strength cannot be pursued at the same time, thus meeting the requirements for use in driving motors of new energy vehicles.
C21D 6/00 - Traitement thermique des alliages ferreux
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 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
9.
METHOD FOR CONTROLLING FOREIGN MATERIAL EMBEDDED IN SURFACES OF THIN STEEL STRIP
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhu, Yihai
Liu, Yujun
Wu, Rongzhou
Qian, Bin
Zhang, Ting
Zhai, Yiqing
Li, Xiaojia
Abrégé
A method for controlling foreign material embedded in the surfaces of the thin steel strip comprises any one or more than one of the following steps: (1) controlling production of molten steel: controlling an oxygen blowing amount of a refining furnace to be at 15-18 m3and controlling a quantity of the molten steel in a tundish to be above 15 tonnes; (2) controlling a hot box atmosphere between a twin roll caster and a hot rolling mill: controlling a nitrogen flow rate in the hot box to be not less than 2500 m3/h, and controlling a total flow rate of compressed air in the hot box to be as follows: when rolling thin steel strip with a gauge over 1.2 mm, the total flow rate of the compressed air is controlled to be less than 100 m3/h; or, when rolling thin steel strip with a gauge of 1.2 mm and below, the total flow rate of the compressed air is controlled not to exceed 350 m3/h.
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhu, Yihai
Liu, Yujun
Chen, Weigang
Liu, Weijuan
Xu, Junnan
Yi, Zijie
Abrégé
A method for stabilizing carbon content of molten steel in a ladle in a refining furnace that treats molten steel in a "ladle metallurgy" process is disclosed. The method comprises melting solid slag (if any) before heating molten steel using electrically-powered electrodes in the refining furnace. The method also comprises controlling the flow rate of argon into a bottom section of the ladle to a target flow rate of argon of 100-200 L/min while the molten steel is being heated using electrically-powered electrodes in the refining furnace to reduce scouring, i.e., abrading, of electrodes by flow of the molten steel and foamed slag past the electrodes. The method also comprises adding lime in batches to molten steel.
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED SHEET CO., LTD. (Chine)
Inventeur(s)
Zhou, Yanzhao
Ma, Jianchao
Zhao, Jiaqi
Li, Ning
Abrégé
Disclosed in the present invention is a method for producing a steel strip for a battery case. The steel strip for a battery case comprises the following chemical components in percentage by mass: carbon: 0.003-0.006%, silicon: ≤0.03%, manganese: 0.35-0.45%, titanium: 0.040-0.050%, aluminum: 0.040-0.060%, phosphorus: ≤0.020%, sulfur: ≤0.012%, nitrogen: ≤0.0040%, and the balance of iron and other inevitable impurities, wherein 7>Ti/(C+N)>5. The process flow of the production is as follows: pretreatment of hot metal → converter smelting → LF refining → RH treatment → continuous pouring → hot rolling → acid pickling → cold rolling → continuous annealing → finishing. In the present invention, by means of designing the chemical components, the Δr value of strip steel is reduced, and the isotropy and machinability of the strip steel are improved; and by means of the process, precise control over steel components and effective control over the amount and size of inclusions in the steel are achieved, the amount of inclusions in a shallow surface layer of a casting blank is reduced, the peeling depth is reduced or peeling is avoided, and the yield is increased.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhen, Fan
Qu, Jinbo
Shao, Chunjuan
Yang, Hao
Abrégé
Disclosed in the present invention are a stainless steel clad plate for a bridge structure, and a preparation method for the stainless steel clad plate. In the method, billet assembling is performed by means of using a carbon steel substrate A on an upper layer, a carbon steel substrate B on a lower layer, and at least two stainless steel composite materials on an intermediate layer, and four seals surrounding four side edges of the intermediate layer, wherein the seals are provided with circular through holes, steel tubes are welded in the through holes, and holes are reserved around the steel tubes during surfacing; after vacuumizing, the steel tubes are bent into the reserved holes; full welding is then carried out to seal-weld the steel tubes in the holes; during whole rolling, transverse rolling is used for the first N passes, and longitudinal rolling is subsequently used; and after the nth pass and the (n+2)th pass, a billet is subjected to one instance of back-and-forth water cooling in six sets of headers.
B32B 37/06 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par le procédé de chauffage
B32B 37/10 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par la technique de pressage, p. ex. faisant usage de l'action directe du vide ou d'un fluide sous pression
B32B 37/08 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par le procédé de refroidissement
B32B 37/14 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par les propriétés des couches
B32B 38/18 - Manipulation des couches ou du stratifié
13.
STAINLESS STEEL COMPOSITE PANEL HAVING EXCELLENT INTERFACE BONDING AND PREPARATION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
Inventeur(s)
Zhen, Fan
Qu, Jinbo
Ma, Han
Shao, Chunjuan
Yang, Hao
Zheng, Chuanbo
Li, Xiaobing
Zhang, Chao
Abrégé
Disclosed in the present invention are a stainless steel composite panel having excellent interface bonding and a preparation method therefor. In a rolling process of the method, longitudinal rolling is performed after n passes of transverse rolling, a reduction rate of a first pass is greater than or equal to 25 mm, the temperature is greater than or equal to 1060°C in the first pass, a target width is achieved in an nth pass, and the temperature is greater than or equal to 1030°C in the nth pass; after the nth pass and an (n+2)-th pass, reciprocating water cooling is performed once in six sets of headers, the cooling water amount of upper headers and the cooling water amount of lower headers are respectively 120-180 m3/h and 160-220 m3/h, and the roller way speed is 0.8-1.2 m/s; the reduction rate of the (n+1)-th to (n+3)-th passes is greater than or equal to 40 mm, and the temperature is greater than or equal to 950°C in the (n+1)-th pass; when reaching an mth pass, the temperature is greater than or equal to 900°C, and a blank thickness is 2.5-3.5 times of a target thickness of a large composite panel; then watering and cooling are performed until the surface temperature of a blank is reduced to 840°C or below; and then second-stage rolling is performed, the temperature of the first pass of the second-stage rolling is 810-840°C, and the temperature of the last pass of the second-stage rolling is 780-810°C.
B21B 1/38 - 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 feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
B21B 47/00 - Agencements, dispositifs ou méthodes auxiliaires, associés au laminage des feuilles de métal multicouches
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 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
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
14.
STAINLESS STEEL COMPOSITE PLATE WITH EXCELLENT APPEARANCE, AND PREPARATION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY (Chine)
Inventeur(s)
Zhen, Fan
Qu, Jinbo
Shao, Chunjuan
Lu, Chunjie
Zheng, Chuanbo
Li, Xiaobing
Abrégé
A stainless steel composite plate with an excellent appearance, and a preparation method therefor. The method comprises three main steps, i.e., composite blank preparation, composite blank rolling, and composite plate separation and straightening, wherein in the step of composite blank preparation, three instances of vacuumizing and two instances of vacuum breaking are performed on a composite blank by means of a seamless steel pipe, and finally the vacuum degree is less than or equal to 10^-2 Pa; in the step of composite blank rolling, intermittent cooling and straightening are performed, and stacking cooling is performed using two steel plates which are at T^f-150°C to T^f+150°C; and in the step of composite plate separation and straightening, flattening is performed using a flattening machine, a transverse flattening force F1 being equal to ν×a×b×c^transverse×σ^transverse/(d×(ν-c^transverse/a)), and a longitudinal flattening force F2 being equal to a×b×c^longitudinal×σ^longitudinal/(d+c^longitudinal). The composite plate has an excellent appearance and an excellent interfacial bonding quality, the degree of unevenness is less than or equal to 3 mm/m, the composite interfacial bonding rate is 100%, the shear strength is greater than or equal to 300 MPa, and the yield and production efficiency are high.
B21B 1/38 - 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 feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
B21B 1/00 - 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
B21B 47/02 - Agencements, dispositifs ou méthodes auxiliaires, associés au laminage des feuilles de métal multicouches pour plier les feuilles avant le laminage
B21B 47/00 - Agencements, dispositifs ou méthodes auxiliaires, associés au laminage des feuilles de métal multicouches
B32B 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
B32B 15/00 - Produits stratifiés composés essentiellement de métal
B21C 37/02 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière des tôles
B21C 37/00 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière
15.
PLASTIC MOLD STEEL PLATE AND METHOD FOR PRODUCING SAME
A plastic mold steel plate and a method for producing the same. The method includes: heating a billet, the temperature of a soaking section being 1210˜1250° C.; rolling into a steel plate, an initial rolling temperature being 1060˜1140° C., and a final rolling temperature being 980˜1050° C.; moving the steel plate to a cooling bed for air cooling to 200° C. or lower; then normalizing, a normalizing temperature being Ac3+60° C. to Ac3+90° C.; after normalizing, moving the steel plate to the cooling bed for air cooling to Bf−50° C. to Bf−20° C.; finally, cross-stacking the steel plate with a ferritic pearlitic steel plate with a temperature of 450˜550° C.; during the stacking period, self-tempering the steel plate until the temperature of the steel plate is reduced to Bf−50° C. to Bf−20° C.; and after that, unstacking and air cooling.
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
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Li, Tengfei
Li, Hualong
Shi, Yixin
Chen, Aihua
Li, Tingting
Li, Xia
Zhang, Shujuan
Zhou, Dongsheng
Chen, Kangyan
Abrégé
The invention belongs to the technical field of steel production and discloses a method for reducing the occurrence probability of cracked weathering steel from twin-roll thin strip casting. The chemical composition of molten steel of the invention comprises, by mass percentage: C: ≤0.03-0.009*Si-0.01*Si*Mn-0.0015*Mn-0.013*Cu; Mn: 0.4-1.0%; Si: 0.2-0.4%; Cu: 0.25-0.4%; Cr: 0.3-0.5%; P: 0.07-0.18%; S: ≤0.003%; O: 0.004-0.008%; H≤0.0005%. By optimizing the chemical composition and casting and rolling process of weathering steel, the crack judgment rate of weathering steel from twin-roll thin strip casting is reduced to no more than 1.0%.
C22C 33/04 - Fabrication des alliages ferreux par fusion
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
B22D 11/12 - Accessoires pour le traitement ultérieur ou le travail sur place des barres coulées
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
17.
ULTRA-LARGE LINEAR ENERGY WELDING STEEL AND PREPARATION METHOD THEREFOR
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL , JIANGSU PROVINCE/SHA-STEEL , CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhao, Fu
Zhang, Yu
Wang, Na
Abrégé
A preparation method for ultra-large linear energy welding steel, and prepared welding steel. A steel plate oxide inclusion beneficial control is used, and low-temperature large-rolling-reduction rolling is also used. The size and distribution of an oxide in a steel plate are regulated and controlled by controlling a rolling process, thereby realizing the preparation of ultra-large linear energy welding steel. The method has a low production cost, the production process is easy to control, the operation is simple, the method is suitable for large-scale production, and the mechanical properties and welding heat impact properties of the base material are excellent.
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 11/00 - Commande ou régulation du processus lors de traitements thermiques
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
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
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
B21B 37/58 - Commande de la force de laminageCommande de l'écartement des cylindres
B21B 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
B21B 37/76 - Commande du refroidissement sur la table de sortie
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 1/46 - 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 du métal immédiatement après la coulée continue
INSTITUTE OF RESEARCH OF IRON AND STEEL , JIANGSU PROVINCE/SHA-STEEL , CO. LTD (CN) (Chine)
Inventeur(s)
Chen, Huande
Ma, Han
Yang, Xiaowei
Zhang, Yu
Zhou, Yun
Abrégé
The present invention belongs to the technical field of steel smelting, and provides a corrosion-resistant steel bar and a production method therefor. The corrosion-resistant steel bar comprises in percentage by weight: 0.03-0.15% of C, 0.8-2.0% of Si, 0.8-2.0% of Mn, 0.10-0.50% of Cu, 0.08-0.2% of P, 0.005-0.01% of S, ≤ 0.1% of Nb, ≤ 0.2% of V, ≤ 0.1% of Ti, ≤ 0.1% of Al, the balance of Fe, and inevitable impurities; 0.6 ≤ Si/Mn ≤ 2.0, 0.25 ≤ Cu+P+S ≤ 0.62. By means of the associated design of alloy elements such as Si, Mn, Cu, P, and S, the strengthening effect and the corrosion resistance effect of each element are considered, so that the problem that the corrosion resistance, mechanical properties, and cost cannot be achieved at the same time in the prior art is solved, and the technical bias that Cr, Ni, or Mo must be added to improve the corrosion resistance in the prior art is overcome.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Lu, Jiadong
Wu, Shengjie
Qian, Hongwei
Abrégé
The present application discloses a non-oriented silicon steel and a method for producing the same. The production method includes: carrying out steelmaking in accordance with 0.8-1.1% of Si and 0.2-0.4% of Mn, without the addition of Sn and Sb, and making a cast billet; heating the cast billet to 1060-1120° C., then rolling and finish rolling and coiling the cast billet into a hot rolled coil with a thickness of 3.00±0.25 mm, where the start-rolling temperature for finish rolling is ≤872° C.+1000*(11*[Si]−14*[Mn]+21*[Al]), the end-rolling temperature for finish rolling is ≤820° C., and the coiling temperature is ≤560° C.; normalizing and acid tandem rolling, where the normalizing temperature is 850-900° C.; and annealing at the temperature for final annealing of 820-880° C., cooling, coating and finishing are carried out to obtain the non-oriented silicon steel.
C21D 6/00 - Traitement thermique des alliages ferreux
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO., LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL , JIANGSU PROVINCE/SHA-STEEL , CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Lan, Haotian
Song, Yifeng
Xu, Xiaohan
Yue, Chongxiang
Abrégé
A manufacturing method for a tinplate, relating to the technical field of steel plate manufacturing. With regard to the manufacturing method for a tinplate: in the step of flattening a base plate, double stands are used for flattening, a first stand working roller have a surface roughness value Ra of 1.6-1.7μm and a rolling force of 5000-6000kN, and a second stand working roller have a surface roughness value Ra of 0.5-0.6μm and a rolling force of 3000-4000kN; in the step of electroplating the base plate, an electroplating solution have a Sn 2+concentration of 14-19mL/L; and in the step of passivating the base plate, a passivation solution have a temperature of 41-43℃, a pH value of 4.4-4.6, and a concentration of 16-18g/L, the passivation electric charge density being 120-180C/m 2. In the manufacturing method, by means of the synergistic effect of various process parameters, the corrosion resistance and the adhesive force of the tinplate may meet the use requirements at the same time.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ye, Qibin
Qu, Jinbo
Abrégé
A low-temperature steel for marine engineering, and a production method therefor. The steel comprises the following chemical components: 0.07-0.13% of carbon, 0.1-0.4% of silicon, 0.6-1.5% of manganese, 5-9% of nickel, 0.6-0.8% of chromium, 0.6-0.9% of molybdenum, 0.1-0.16% of vanadium, 0.4-0.8% of copper, with the balance being iron and impurities. A process route of smelting → refining → continuous casting → heating → rolling → cooling → three-stage heat treatment is used. In the first-stage heat treatment, the temperature is 800-850ºC, the heat preservation time coefficient is 1-1.5 min/mm, and water cooling is performed; in the second-stage heat treatment, the temperature is 700-720ºC, the heat preservation time coefficient is 1-1.5 min/mm, and water cooling is performed; and in the third-stage heat treatment, the temperature is 600-620ºC, the heat preservation time coefficient is 2-2.5 min/mm, and air cooling is performed. The steel has good comprehensive performance in an environment at -80ºC or lower and satisfies the requirements of the marine engineering field.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
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
22.
NON-ORIENTED SILICON STEEL PLATE AND PRODUCTION METHOD THEREFOR
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Huang, Jie
Xie, Shishu
Yue, Chongxiang
Lu, Jiadong
Abrégé
A non-oriented silicon steel plate and a production method therefor. The content of Si and the content of Al in non-oriented silicon steel are finely regulated and controlled on the basis of the value of (Si/Al)/(Si+Al), and a production process is accurately controlled, so that texture optimization of a silicon steel substrate is promoted, iron loss after secondary annealing is reduced, and theus the loss of a motor product is remarkably reduced. Moreover, the total amount of Si and Al added in the non-oriented silicon steel plate is low, so that the alloy cost is low, and the production process is simple. Therefore, the comprehensive cost of the non-oriented silicon steel plate is relatively low, and the product has better market competitiveness.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
INSTITUTE OF RESEARCH OF IRON AND STEEL , JIANGSU PROVINCE/SHA-STEEL , CO. LTD (CN) (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Song, Yifeng
Lan, Haotian
Xu, Xiaohan
Yue, Chongxiang
Abrégé
The present application relates to the technical field of alloy materials, and in particular, to a tin plate and a manufacturing method therefor. According to the provided manufacturing method for the tin plate, a component design of low-carbon aluminum killed steel is employed; under the condition of not increasing the alloy content and the production control difficulty, the content of elements such as C, Mn, Al and N in the tin plate is designed, and corresponding hot rolling, cold rolling, annealing and leveling processes are used; the strengthening effects of conventional elements, carbon and manganese, are fully utilized, aluminum nitride precipitation control in hot rolling is taken into account, a proper cold rolling reduction rate is selected, the ferrite grain size and cementite precipitation in steel are controlled by means of continuous annealing and over-aging treatment, and a specific leveling process is used, so that a tin plate having small strength and hardness fluctuations, a high elongation rate and a short yield plateau is produced. In addition, the amount of alloy tin is reasonably controlled to meet the requirements for stamping formability, pressure resistance and surface glossiness of an aerosol can top cover, so that the tin plate has simple components, the process is simple and easy to implement, and the production cost is low.
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
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
B21C 37/02 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière des tôles
B21B 1/22 - 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
24.
STEEL FOR SUBMERGED-ARC WELDING WIRE, WIRE ROD, SUBMERGED-ARC WELDING WIRE AND PREPARATION METHOD THEREFOR
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO., LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Wang, Na
Zhang, Yu
Ma, Han
Abrégé
22322, and 10-20% MnO, and during the LF refining process, a pure calcium wire is fed before tapping. A steel for a submerged-arc welding wire and a preparation method therefor, a wire rod for a submerged-arc welding wire, a submerged-arc welding wire and a preparation method therefor. The steel for the submerged-arc welding wire and the preparation method for the submerged-arc welding wire overcome the defects of submerged-arc welding wire being high in cost and prone to nodulation; when the steel for the submerged-arc welding wire is prepared, it may continuously cast in more than 10 furnaces.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Han
Lu, Chunjie
Abrégé
A corrosion-resistant 460 MPa-grade steel plate and a production method therefor. The steel plate uses a corrosion-resistant alloying component system and has Cr, Ni, Mo, Cu, P added therein, so that the usage of precious alloy is reduced while the corrosion resistance and the welding performance are ensured. While impurity elements are strictly controlled, one or more rare earth elements from La, Ce, Pr, and Nd are used to purify molten steel, such that the corrosion resistance is further improved. The comprehensive design of chemical components and accurate control over technological parameters in rolling and cooling processes achieve accurate control over the structure, inclusion content, and size of the steel plate. In this way, the marine atmospheric corrosion-resistant 460 MPa-grade steel plate for use in wind power tower cylinders and having good comprehensive performance is obtained.
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
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
26.
METHOD FOR AMELIORATING ROLL MARKS ON SURFACE OF ULTRATHIN STRIP STEEL
A method for ameliorating roll marks on the surface of ultrathin strip steel. By adjusting the thickness of a cast strip to 1.8-2.0 mm, the crown of the cast strip to 35-80 μm, the temperature of the cast strip to 1050-1200°C, the air flow of a hot chamber to 100-200 m3/h, the tension of the front strip steel of a rolling mill to 2.0-3.5 MPa, the rolling starting reduction to 15-25%, and the rolling starting reduction rate to 0.6-0.9 mm/s, the roll mark defect of the ultrathin strip steel produced by twin-roll casting is at least ameliorated, and even avoided.
B21B 1/22 - 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
B21B 37/16 - Commande de l'épaisseur, de la largeur, du diamètre ou d'autres dimensions transversales
B21B 37/28 - Commande de la planéité ou du profil pendant le laminage de bandes, de feuilles ou de tôles
B21B 37/48 - Commande de la tensionCommande de la compression
B21B 37/76 - Commande du refroidissement sur la table de sortie
27.
DEVICE AND METHOD FOR AMELIORATING ROLLER MARKS FORMED ON SURFACE OF THIN STRIP STEEL BY PINCH ROLLERS
Provided in the present invention is a device for ameliorating roller marks formed on a surface of thin strip steel by pinch rollers. In the design of the device, a local cooling beam is provided at the entrance or exit of pinch rollers to spray liquid nitrogen in the local thermal expansion region of the pinch rollers for cooling, so as to ameliorate local thermal expansion of the pinch rollers in order to adjust the roller gap and pressure between the pinch rollers, thereby reducing roller mark defects formed by the pinch rollers. In addition, further provided in the present invention is a method for alleviating pinch roller marks on hot-rolled thin strip steel during double-roller casting and rolling production. By means of the device and method for ameliorating roller marks formed on a surface of thin strip steel by pinch rollers, the rejection rate of thin strip steel products can be effectively reduced, and the qualification rate and profitability of thin strip steel products are improved.
B21B 39/02 - Avance du matériau ou soutien de celui-ciSystèmes de freinage ou de tension
B21B 39/10 - Disposition ou installation de rouleaux amenant le matériau aux cages de laminoirs
B21B 28/00 - Maintenance des cylindres ou du matériel de laminage en état de fonctionnement
F25D 3/11 - Dispositifs utilisant d'autres agents froidsDispositifs utilisant des récipients conservant le froid utilisant des gaz liquéfiés, p. ex. de l'air liquide avec transporteurs faisant traverser la chambre de refroidissement aux produits à refroidir
F25D 29/00 - Disposition ou montage de l'appareillage de commande ou de sécurité
28.
METHOD FOR MITIGATING LOCAL HIGH POINTS OF HOT-ROLLED THIN STEEL STRIP
A method for mitigating local high points of the plate shape of a hot-rolled thin steel strip. A thin strip continuous casting key component is controlled, and the plate shape of a cast strip formed by twin roll continuous casting is controlled, so that the purpose of controlling local high points of a one-pass hot-rolled thin steel strip is achieved, and the plate shape profile of the thin steel strip and the surface quality of a steel coil are improved. In a casting process, the surface flatness of roll brushes, the bristle density and hardness of the roll brushes, and the dynamic balance value, rotating speed, and torque of the roll brushes are controlled, the sediment uniformity on the surfaces of casting rolls in a twin-roll continuous casting process is controlled, and the casting force in the twin-roll continuous casting process is controlled, so that the effects of eliminating local high points of a continuous cast strip and improving the smoothness of the plate shape profile of a cast strip are achieved, and thus the defects of local high points of the plate shape profile of the hot-rolled thin steel strip and ribs formed on the surface of the steel coil are eliminated. The plate shape quality and the coil shape quality of thin steel strips can be improved, and the qualification rate of products can be improved.
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
B22D 11/16 - Commande ou régulation des opérations ou du fonctionnement
B22D 11/00 - Coulée continue des métaux, c.-à-d. en longueur indéfinie
B22D 43/00 - Décrassage mécanique, p. ex. raclage du métal liquide
B21B 1/46 - 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 du métal immédiatement après la coulée continue
B21B 1/00 - 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
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
B21B 38/00 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p. ex. détection de la position, inspection du produit
B08B 1/00 - Nettoyage par des procédés impliquant l'utilisation d'outils
29.
RESOURCE RECOVERY METHOD AND RESOURCE RECOVERY SYSTEM OF DESULFURIZED ASH
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD. (Chine)
Inventeur(s)
Mao, Rui
Mao, Shendong
Wang, Fei
Su, Hang
Abrégé
The present invention discloses a resource recovery method and a resource recovery system of desulfurized ash. The resource recovery method comprises: washing desulfurized ash with water, and performing solid-liquid separation to obtain solid residues rich in calcium sulfite and calcium sulfate and a solution rich in calcium hydroxide; preparing the solution into desulfurized slurry; and roasting the solid residues under the action of a reducing agent to obtain flue gas rich in sulfur dioxide and residues rich in calcium oxide. Therefore, the recovery of sulfur and calcium in the desulfurized ash is realized, and no solid waste, liquid waste, gas waste, etc. are produced in the process.
B09B 3/40 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif impliquant un traitement thermique, p. ex. évaporation
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO., LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Lan, Haotian
Hu, Xianjun
Zhu, Henan
Abrégé
1.0/10001.0/1000 by means of resistivity control, inclusion control, texture control, grain size control and the like, the smelting cost is low, the production process is simple, the production cost is low, and the application requirements of a high speed, a small size and high efficiency of a high-speed motor are satisfied.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
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 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 33/04 - Fabrication des alliages ferreux par fusion
31.
400 MPa CORROSION-RESISTANT STEEL BAR AND PRODUCTION METHOD THEREOF
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Han
Zhou, Yun
Zhao, Jiaqi
Zhang, Yu
Chen, Huande
Abrégé
The present invention discloses a 400 MPa corrosion-resistant steel bar and a production method thereof. The steel bar includes the following chemical ingredients: 9.5-10.4% of Cr, 1.0-1.2% of Mo, 0.3-0.6% of Mn, 0.01-1% of Ni, 0.01-0.5% of Cu, at most 0.014% of C, at most 0.004% of N, 0.01-0.05% of Nb, 0.2-0.6% of Si, and the balance of Fe, where Cr+Mo+0.5Mn+0.35Ni+0.25Cu is 11.1-12.2%, and C+N+0.3Si+Mn+1.8Nb is 0.4-0.8%.
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
C21C 7/00 - Traitement à l'état liquide des alliages ferreux, p. ex. des aciers, non couverts par les groupes
C21D 6/00 - Traitement thermique des alliages ferreux
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
32.
HIGH-CARBON STEEL WIRE ROD AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Jianchao
Shen, Kui
Ma, Han
Li, Qiang
Abrégé
A high-carbon steel wire rod and a production method therefor. The production method comprises: performing smelting to obtain molten steel; performing continuous casting on the molten steel to obtain a continuous casting billet, and performing reduction treatment on the continuous casting billet by using reduction rates, which are high, low and high in sequence, during a continuous casting process; performing breakdown rolling on the continuous casting billet after heating the continuous casting billet, so as to obtain a breakdown material; and performing rolling and air cooling treatment on the breakdown material after heating the breakdown material, so as to obtain a wire rod.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yang, Hao
Qu, Jinbo
Zhen, Fan
Lu, Chunjie
Abrégé
An extra-thick Q500qE bridge steel plate and a production method therefor. In the production method, a rolling treatment is directly performed on a slab after heating performed before three-stage rolling, and a three-stage cooling treatment is performed on a steel plate after rolling, such that a Q500qE steel plate with the maximum thickness of 150 mm can be obtained, and the steel plate can satisfy Z-direction tensile property requirements for Z35 grade and flaw detection requirements for grade II or above in the GB/T 2970-2016 standard. By means of such arrangement, the production process is simple, and has high efficiency and low production costs.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Lu, Jiadong
Zhou, Yanzhao
Li, Hualong
Abrégé
A non-oriented silicon steel and a production method are provided. The non-oriented silicon steel is prepared by using the processes of molten iron desulfurization, converter smelting, RH refining, continuous casting, hot rolling, acid tandem rolling, annealing, coating and finishing, and a chemical composition is as follows in mass percent:
C≤0.003%, S≤0.008%, Si: 0.35%+Δ1, Mn: 0.15-0.25%, P: 0.04-0.06%, Sn: 0.015%+Δ2, Nb≤0.004%, V≤0.004%, Ti≤0.005%, Mo≤0.004%, Cr≤0.03%, Ni≤0.03%, Cu≤0.03%, N≤0.003% and the balance of Fe and inevitable inclusions. The non-oriented silicon steel has the iron loss P1.5/50≤5.5 W/kg and the magnetic induction intensity B5000≥1.75 when having the thickness of 0.5 mm, and desulfurization is not needed in the RH refining process.
C21D 9/52 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour fils métalliquesTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour bandes métalliques
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
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
C21D 6/00 - Traitement thermique des alliages ferreux
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Han
Shen, Kui
Hu, Xianjun
Wang, Lei
Abrégé
A wire rod for a 5000 MPa-grade diamond wire and a production method are provided. The wire rod includes the following chemical components: 1.01% to 1.1% of carbon, 0.15% to 0.4% of silicon, 0.3% to 0.6% of manganese, 0.01% to 0.4% of chromium, 0.0005% to 0.002% of boron and/or 0.01% to 0.09% of vanadium; and the balance of iron and impurities. The production method includes vacuum melting, electroslag remelting and/or vacuum consumable melting, grinding after cogging/forging, high-speed wire rolling and cooling, and cogging at 1030° C. to 1060° C. The wire rod, with structural uniformity and tensile strength of more than or equal to 1320 MPa, can be configured to prepare 5000 MPa-grade steel wires with a diameter of 40 μm to 46 μm.
C21D 9/52 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour fils métalliquesTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour bandes métalliques
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/32 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du bore
C22C 38/28 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du titane ou du zirconium
C22C 38/24 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du vanadium
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
C21B 13/12 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours électriques
C21D 7/13 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à chaud
36.
CORROSION-RESISTANT ALLOY STEEL BAR AND PREPARATION METHOD THEREFOR
Provided in the present application are a corrosion-resistant alloy steel bar and a preparation method therefor, wherein the corrosion-resistant alloy steel bar comprises, in percentage by weight: 0.05-0.25% of C, 1.05-2% of Si, 0.3-1.5% of Mn, 0.5-2.5% of Cr, 0.05-1% of Ni, 0.001-0.005% of O, 0.001-0.0035% of S, 0.005-0.1% of Ti, 0.005-0.1% of Al, 0.005-0.03% of V, and 0.005-0.03% of Nb, with the balance being Fe and inevitable impurities. The preparation method therefor comprises the successive steps of smelting, refining, continuous casting, rolling and cooling. In the present application, elements such as Si, Ti, Al and Mn are used for compensating for the reduction in corrosion resistance caused by a decrease in the content of Cr, such that the production cost of the corrosion-resistant alloy steel bar are greatly reduced.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C21D 8/08 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de barres ou de fils pour fer à béton
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Zhao, Hui
Nie, Wenjin
Li, Ran
Lin, Taozhu
Wu, Ling
Abrégé
The present invention relates to a normalizing heat treatment production process, comprising the steps of: feeding a slab of a steel plate into a heating furnace for heating, wherein the final temperature before the slab is discharged out of the furnace is controlled to be 1180-1200°C, and the time of the slab in the furnace is greater than or equal to 1.0 min/mm; rolling the slab into a preset finished steel plate size by means of a rolling mill, wherein the final rolling temperature is 940°C or above, the cooling temperature of the steel plate is 710-750°C, and the cooling rate is controlled to be 10±5°C/s; stacking and slowly cooling the steel plate offline to 80°C or below; feeding the steel plate into a heat treatment furnace, wherein the temperature of each area of the heat treatment furnace is set to be 940-950°C, the time of the steel plate in the heat treatment furnace is 1.2-1.4 min/mm, the temperature of the tail of the steel plate is not lower than 880°C when the steel plate is discharged out of the heat treatment furnace; and cooling the steel plate. According to the present invention, the time of the steel plate in the heat treatment furnace can be shortened, thereby achieving the purpose of improving the normalizing production efficiency.
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
38.
HIGH-GRADE NON-ORIENTED SILICON STEEL AND PRODUCTION METHOD THEREOF
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Wu, Shengjie
Lu, Jiadong
Li, Hui
Abrégé
A high-grade non-oriented silicon steel and a production method are provided. The non-oriented silicon steel includes the following chemical components in percent by mass: 0.002-0.004% of C, not greater than 0.003% of S, 1.4-1.7% of Si, 0.7-0.95% of Mn, not greater than 0.03% of P, 0.015-0.035% of Sn; and 11×([Si]-1.4%)=14×([Mn]-0.7%). In the production method, the heating temperature of a continuous casting billet is 1,120-1,150° C.; the finishing temperature in finish rolling is 890±15° C.; the rolling reduction of the last pass of finish rolling is not less than 30%, the total rolling reduction of the last two passes of finish rolling is not less than 50%, and the coiling temperature is 650±20° C.; normalizing treatment is avoided before acid continuous rolling.
B22D 11/00 - Coulée continue des métaux, c.-à-d. en longueur indéfinie
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/34 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C21D 9/52 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour fils métalliquesTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour bandes métalliques
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C21D 6/00 - Traitement thermique des alliages ferreux
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
39.
HIGH HEAT INPUT WELDING STEEL PLATE AND MANUFACTURING METHOD THEREFOR
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhang, Yu
Zhao, Fu
Wang, Na
Abrégé
The invention provides a high heat input welding steel plate and a manufacturing method therefor. The chemical composition of the high heat input welding steel plate comprises, by mass percentages: C≤0.1%, Si≤0.15%, S≤0.004%, Mn+Cr+Ni+Cu: 1.5-4.5%, Cr/Ni/Cu mass ratio: 1:2:1, Ti+Mg+Zr+Ca: 0.03-0.3%, Ti+Mg: 0.03-0.2%, and the rest being Fe and unavoidable impurities; a carbon equivalent Ceq is 0.36-0.42, and Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. In the manufacturing process for the steel plate, zirconium-calcium cored wire is added during RH refining, slabs are continuously cast after RH tapping, and the slabs undergo rolling in a recrystallization zone and rolling in a non-recrystallization zone, which can promote the formation of acicular ferrite and improve the crack arrest performance of the steel plate.
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du 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.
METHOD FOR CONTROLLING BRITTLE INCLUSIONS OF TIRE CORD STEEL
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
JIANGSU SHAGANG HIGH-TECH INFORMATION TECHNOLOGY CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Chen, Lei
Xia, Qi
Wang, Zhe
Abrégé
Disclosed in the present invention is a high-speed wire coil shape and position detection method based on infrared technology. The method comprises: acquiring an original material image on a wire coil conveying roller track, and converting same into a corresponding grayscale image; performing noise reduction processing on the grayscale image by using a standard median filtering method; then, acquiring an edge contour and a depression point of a coil by using a bidirectional threshold segmentation method; and performing fitting using a least squares fitting algorithm, so as to obtain a corresponding equivalent ellipse, taking a calculated position of the central point and a calculated length of the major axis of the equivalent ellipse as the position of the center and the diameter of a wire coil layer corresponding to a curve segment combination, and calculating the shapes and positions of all the coils in the current original material image. In the present invention, the shapes and positions of all coils are acquired by means of analyzing and extracting contours and depression points and by means of a curve pairing method; and with regard to situations such as a sudden change, a production line operator is reminded in a timely manner to perform corresponding processing, thereby reducing product quality problems.
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zhang, Yu
Tang, Yao
Wang, Na
Zhao, Fu
Abrégé
LSLSS≤45 ℃. The steel wire rod for the welding wire is reasonable in the design of components and mass percentages, the desulfurization cost in a steelmaking process is reduced, the metal fluidity of welding seams is good, the weld pool is fast to solidify, and the welding seam forming property is good. The problem of downward flowing and falling of welding seam metal at a 12 o'clock position during all-position welding is solved. The surface of the welding seams is uniform and smooth during all-position welding, and welding bead presents an aesthetic form. The present invention further relates to a gas shielded arc welding wire and a production method of the steel wire rod for the gas shielded arc welding wire.
B23K 35/30 - Emploi de matériaux spécifiés pour le soudage ou le brasage dont le principal constituant fond à moins de 1550 C
B23K 35/40 - Fabrication de fils ou de barres pour le brasage ou le soudage
B23K 35/02 - Baguettes, électrodes, matériaux ou environnements utilisés pour le brasage, le soudage ou le découpage caractérisés par des propriétés mécaniques, p. ex. par la forme
43.
HIGH-VALUE PROCESSING METHOD FOR SOLID WASTE CONTAINING ZINC AND IRON
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Yao, Haiwei
Mao, Rui
Wang, Fei
Abrégé
The present invention discloses a high-value processing method for a solid waste containing zinc and iron, and belongs to the technical field of metal recycling. The method comprises the following steps: washing, filtering, drying, and grinding a solid waste containing zinc and iron to obtain a washed sample; adding the washed sample into a deep eutectic solvent of choline chloride-oxalic acid dihydrate, performing heating and stirring until a clear solution is obtained, and leaving the solution to stand; adding a supernatant of the solution after being left to stand into deionized water, hydrolyzing and filtering the mixture to obtain a filtrate and a residue, and drying and roasting the residue to obtain nano-zinc oxide; and leaving the filtrate to stand, and filtering, drying and roasting the filtrate to obtain nano-ferric oxide. The present invention can efficiently separate zinc oxide and ferric oxide from a solid waste containing zinc and iron, and prepare nano-zinc oxide and nano-ferric oxide without adding a surfactant.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Bao, Dezhi
Nie, Wenjin
Cheng, Jiahui
Wang, Zhifu
Feng, Hongwei
Abrégé
The present invention relates to the field of smelting, and disclosed is a low-cost smelting and continuous casting method for pre-hardened plastic mold steel, comprising: step 1, smelting molten steel in a converter; step 2, ladle refining; step 3, performing degassing treatment; and step 4, performing continuous casting to obtain a casting blank. According to the present invention, the total casting furnace number in step 4 is within the range of 12-17 furnaces of steel, due to the increase of the continuous casting furnace number, the residual steel amount of a tundish, the loss of scrap steel of cut heads and cut tails, the consumption of each piece of refractory per ton of steel, etc. are all reduced, and the production costs of each ton of steel is reduced; and in step 4 of the present invention, the continuous casting furnace number is increased by quickly changing a water port, and the length of the head blank (abnormal blank) is controlled, such that the effect of the abnormal blank on the yield can be reduced from 4.6% to 2.9%.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Du, Ping
Wang, Yonghong
Xing, Yiwei
Song, Jianfeng
Gu, Yan
Abrégé
Disclosed in the present invention is an ultra-thick material layer sintering process, which belongs to the technical field of iron ore smelting. The process comprises the following steps: dividing a uniformly mixed ore into an upper-layer material and a lower-layer material according to the mass ratio of 1:(0.6-1.5); respectively adding a flux and a fuel to the upper-layer material and the lower-layer material, and then performing primary mixing and secondary mixing, wherein the mass of the fuel in the upper-layer material is not less than the mass of the fuel in the lower-layer material; respectively feeding the upper-layer material and the lower-layer material, which have been subjected to the secondary mixing, into two feeding bins, carrying out a material distribution according to the sequence of the lower-layer material being prior to the upper-layer material, and carrying out sintering after ignition. According to the present invention, a 1-1.5 m ultra-thick material layer is sintered by means of the process of separately adding upper and lower layer fuels, mixing the materials in batches and distributing the upper-layer material and the lower-layer material; and the yield can be improved, the burnup can be reduced, and the quality can be stabilized.
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Nie, Wenjin
Lin, Taozhu
Bao, Dezhi
Ding, Xuyan
Li, Ran
Zhang, Jiming
Abrégé
The present invention provides acid-resistant pipeline steel and a manufacturing method therefor. The manufacturing method comprises: performing a pre-desulfurization treatment on molten iron by means of a mechanical stirring method, so that the mass percentage of S in the molten iron is less than or equal to 0.0020%; adding, according to design of compositions, corresponding metals to the molten iron for converter smelting, and controlling the mass percentage of S in molten steel to be less than or equal to 0.0020% and the mass percentage of P to be less than or equal to 0.018%; in a tapping process, adding silicon-manganese, aluminum ingot, micro-carbon ferrochromium, ferro-molybdenum alloy, and lime, so that the mass percentage of Mn in the molten steel is less than or equal to 0.90%, the mass percentage of C is less than or equal to 0.06%, and the sum of the mass percentages of Cr and Mo is greater than or equal to 0.40%; performing ladle refining and RH vacuum treatments, so that the mass percentage of Nb in the molten steel to be greater than or equal to 0.060%, the mass percentage of Ti is greater than or equal to 0.010%, and the sum of the mass percentages of Nb and Ti is greater than or equal to 0.085%; feeding a Ca wire to the molten steel for soft stirring, a superheating degree of casting being no lower than 30°C; and forming a steel plate. The manufacturing method is economical in compositions and facilitates smelting and production.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
C22C 38/28 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du titane ou du zirconium
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
C22C 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
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
47.
METHOD FOR REDUCING FREE CALCIUM OXIDE IN STEEL SLAG BY USING FERRONICKEL SLAG, AND APPLICATION THEREOF
JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY (Chine)
GANSU GOLDEN PIED MONTAND SILVER PEAKS (GPASP) METALLURGICL TECHNOLOGY CO.LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yang, Zhibin
Chen, Chongxue
Jin, Hai
Mao, Rui
Lei, Ming
Du, Ping
Zheng, Chuanbo
Ma, Han
Zou, Changdong
Abrégé
Disclosed in the present invention are a method for reducing free calcium oxide in steel slag by using ferronickel slag, and an application thereof. In the method, ferronickel slag and steel slag are mixed and reacted in a hot melting condition by means of waste heat after smelting, without the need of external heat, wherein the mass ratio of the ferronickel slag to the steel slag is 1:0.6-4, and at least one of the ferronickel slag and the steel slag is in a molten state. Compared with the prior art, the present invention has the following advantages: (1) the problem of high f-CaO content in converter steel slag is solved, and the f-CaO content in steel slag treated by ferronickel slag can be controlled to be 3% or below, thus achieving the purpose of reducing swelling thereof in contact with water, and making mixed steel slag more stable and durable in the field of building materials or directly applicable to the building materials industry and the field of road and bridge construction; (2) the use thereof can also be expanded to reduce f-CaO in other metallurgical slag, mixed treatment of two or more types of slag is not excluded, other components can also be added in the mixing process in addition to metallurgical slag, and the content of f-CaO in the metallurgical slag is reduced by means of the incompactness and the low calcium property of the ferronickel slag.
C04B 5/00 - Traitement des scories fonduesPierre artificielle à partir de scories fondues
C04B 5/06 - Ingrédients, autres que l'eau, ajoutés aux scories fonduesTraitement par des gaz ou par des composés produisant des gaz, p. ex. pour obtenir une scorie poreuse
48.
METHOD FOR CONTROLLING PAINTING SHRINKAGE CAVITY DEFECT OF TINPLATE
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO., LTD. (Chine)
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Huang, Jiugui
Song, Yifeng
Zhao, Qishao
Abrégé
The present invention belongs to the technical field of coating layers, and specifically discloses a method for controlling the painting shrinkage cavity defect of a tinplate. A layer of surface structure with a good coating property is formed on the surface of the tinplate by controlling a leveling process of the surface structure of the tinplate and controlling a passivation and drying process of a passivation film layer on the surface of the tinplate, wherein the surface structure is composed of a passive film and an oil film, the surface roughness Ra is 0.4-0.6 μm, and the surface peak density RPc is 70-90 pieces/cm. In addition, the surface oxidation degree is reduced by controlling the storage environment of the tinplate after shearing and before printing and coating, so that a good wettability is kept, and it is ensured that the surface of the tinplate has good coatability before coating, and the problem of painting shrinkage cavity of the tinplate is solved fundamentally. The control method of the present invention is simple and easy to implement, can meet the requirements of coating the tinplate with coatings such as white coating and golden yellow base oil and can be used in factories in southern humid and hot environments, and the occurrence rate of shrinkage cavities is greatly reduced from 0.5% in the traditional process to 0.02% or less.
C25D 3/30 - Dépôt électrochimiqueBains utilisés à partir de solutions d'étain
B05D 7/14 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers à du métal, p. ex. à des carrosseries de voiture
C23F 11/02 - Inhibition de la corrosion de matériaux métalliques par application d'inhibiteurs sur la surface menacée par la corrosion ou par addition d'inhibiteurs à l'agent corrosif dans l'air ou les gaz par addition d'inhibiteurs en phase vapeur
49.
NON-ORIENTED SILICON STEEL FOR NEW ENERGY DRIVE MOTOR, AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (CN) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
ZHANGJIAGANG YANGZI RIVER COLD-ROLLED SHEET CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Qian, Hongwei
Wu, Shengjie
Zhan, Dongfang
Abrégé
Disclosed in the present invention are a non-oriented silicon steel for a new energy drive motor, and a production method therefor. The silicon steel is prepared by means of steelmaking, continuous casting, hot rolling, normalizing, acid pickling, non-preheating single-stand cold rolling, annealing, cooling, coating, and finishing which are sequentially carried out. No Cu, Cr, Ni, Nb, V, and Ti are added during steelmaking; the silicon steel has the following chemical components: 2.95-3.15% of Si, 0.75-0.95% of Al, 4.6-4.9% of Si + 2Al, 0.5-0.7% of Mn, 0.03-0.04% of Sn, less than or equal to 0.0025% of C, and the balance of iron, wherein Mn/S ≥ 380, and Al/N ≥ 200. By means of the present invention, the strength is improved, while the magnetic performance is ensured, such that the problem of the balance between the magnetic performance and the strength present in the prior art is solved, and the application requirement for the drive motor of a new energy automobile can be met.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/24 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du vanadium
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/28 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du titane ou du zirconium
C22C 33/04 - Fabrication des alliages ferreux par fusion
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
50.
MATERIAL SHIFTING AIR CYLINDER DEVICE FOR DELAYING DOUBLE-SCALE OPERATION OF FINISHED PRODUCTS AND OPERATION METHOD
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO., LTD (CN) (Chine)
Inventeur(s)
Huang, Xiaofeng
Qian, Hongjian
Qin, Hongjian
Wu, Yaxian
Abrégé
The present invention relates to a material shifting air cylinder device for delaying double-scale operation of finished products and an operation method. The material shifting air cylinder device comprises a first input roller way section, a second input roller way section and a third input roller way section which are sequentially arranged. A first thermal detection device and a second thermal detection device are sequentially arranged at the input end of the first input roller way section, an air cylinder is installed at the output end of the first input roller way section, and the pushing end of the air cylinder is in contact with the first input roller way section. A gap is reserved between the output end of the first input roller way section and the input end of the second input roller way section, and the output end of the second input roller way section is joined to the input end of the third input roller way section. Also comprised is a movable wall, located on one side of the second input roller way section and the third input roller way section and extending from the output end of the first input roller way section to the output end of the third input roller way section. The present invention can solve the problem of end-to-end connection caused by fast double-scale line speed of finished products, and the yield is improved.
B65G 47/82 - Éléments à mouvement rotatif ou alternatif agissant directement sur les objets ou matériaux, p. ex. poussoirs, râteaux, pelles
B65G 47/52 - Dispositifs pour transférer objets ou matériaux entre transporteurs, p. ex. pour décharger ou alimenter
B21B 43/00 - Lits de refroidissement fixes ou mobilesMoyens spécialement associés aux lits de refroidissement, p. ex. pour freiner les pièces travaillées, pour les transférer sur le lit de refroidissement ou pour les en retirer
B21B 15/00 - Systèmes permettant d'effectuer des opérations auxiliaires pour le travail des métaux, spécialement combinés, disposés ou adaptés pour être associés aux laminoirs
51.
SUBSTRATE HAVING SANDING SURFACE AND PREPARATION METHOD THEREFOR, AND TIN-PLATED BOARD/CHROME-PLATED BOARD
INSTITUTE OF RESEARCH OF IRON & STEEL, SHAGANG, JIANGSU PROVINCE/SHA-STEEL CO., LTD. (Chine)
ZHANGJIAGANG YANGZI RIVER COLD-ROLLED SHEET CO., LTD. (Chine)
Inventeur(s)
Huang, Jiugui
Yu, Wei
Guo, Hong
Abrégé
A preparation method for a substrate having a sanding surface. The preparation method comprises: providing a flattening mill, which comprises a first rack and a second rack, wherein the first rack comprises a first working roll and a third working roll which are arranged opposite each other, the second rack comprises a second working roll and a fourth working roll which are arranged opposite each other, the first working roll and the second working roll are located on the same side, the first working roll is an electric spark texturing roll, the second working roll is a grinding and polishing roll, the roughness of a surface of the first working roll is 1.6-2.2 μm, and the roughness of a surface of the second working roll is 0.35-0.75 μm; and making the substrate sequentially pass between the first working roll and the third working roll and between the second working roll and the fourth working roll, so as to form a sanding surface on a first surface of the substrate. After the substrate having the sanding surface is subjected to tin plating or chromium plating, when the substrate is processed into a necking tank or an easy-to-open cap, coatings at a necking position and a pre-scribing film are not prone to being damaged, such that the corrosion resistance of same is good.
B21B 1/38 - 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 feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
B24B 1/00 - Procédés de meulage ou de polissageUtilisation d'équipements auxiliaires en relation avec ces procédés
C25D 3/30 - Dépôt électrochimiqueBains utilisés à partir de solutions d'étain
52.
PLASTIC MOLD STEEL PLATE AND PRODUCTION METHOD THEREFOR
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 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
53.
NON-ORIENTED SILICON STEEL AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Lu, Jiadong
Wu, Shengjie
Qian, Hongwei
Abrégé
A non-oriented silicon steel and a production method therefor. The production method: performing steelmaking according to 0.8-1.1% of Si and 0.2-0.4% of Mn, and making a blank without adding Sn and Sb; heating the casting blank to 1060-1120°C and keeping the temperature for more than 150 min, then rolling into an intermediate blank having the thickness of 40-45 mm, then performing finish rolling, and rolling to obtain a hot rolled coil having the thickness of 3.00 ± 0.25 mm, wherein the finish rolling temperature is less than or equal to 872°C+1000*(11*[Si]-14*[Mn]+21*[Al]), the finish rolling temperature is less than or equal to 820°C and the coiling temperature is less than or equal to 560°C; and normalizing and acid continuous rolling to obtain a cold hard roll having the thickness of 0.500 ± 0.005 mm, and the normal temperature of 850-900°C. The annealing temperature of the finished product is 820-880°C, and annealing, cooling, coating and finishing are performed to obtain the non-oriented silicon steel.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
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
54.
WIRE ROD FOR ULTRAHIGH-STRENGTH STEEL CORD AND MANUFACTURING METHOD THEREOF
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL CO., LTD (Chine)
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO., LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Zou, Changdong
Ma, Han
Zhao, Jiaqi
Shen, Kui
Cai, Xiaofeng
Shi, Yixin
Huang, Yonglin
Abrégé
The present invention discloses a wire rod for an ultrahigh-strength steel cord and a manufacturing method thereof. The manufacturing method includes: smelting molten steel where inclusions in sizes ≥5 μm are at a number density ≤0.5/mm2 and sizes of inclusions are ≤30 μm; casting the molten steel into an ingot blank with a center carbon segregation value of 0.92-1.08; cogging the ingot blank into an intermediate blank with a center carbon segregation value of 0.95-1.05; rolling the intermediate blank into a wire rod; and performing temperature control cooling on the wire rod to obtain a wire rod with high purity, high homogeneity and tensile strength ≤1,150 MPa. The wire rod may be used for an ultrahigh-strength steel cord with single tensile strength ≥3,600 MPa.
C21D 11/00 - Commande ou régulation du processus lors de traitements thermiques
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C21D 9/52 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour fils métalliquesTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour bandes métalliques
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
C21D 6/00 - Traitement thermique des alliages ferreux
B22D 11/115 - Traitement du métal liquide en utilisant des moyens agitateurs ou vibrants en utilisant des champs magnétiques
B21B 1/46 - 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 du métal immédiatement après la coulée continue
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
55.
ULTRA-THIN ULTRA-HIGH STRENGTH STEEL WIRE, WIRE ROD AND METHOD OF PRODUCING WIRE ROD
(INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA- STEEL, CO. LTD.) (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Hu, Xianjun
Fan, Jinxi
Ma, Han
Fang, Feng
Cheng, Long
Abrégé
The present invention reveals an ultra-thin ultra-high strength steel wire, a wire rod for an ultra-thin ultra-high strength steel wire and its producing method. The chemical components of the wire rod comprise in percentage by mass: C 0.90˜0.96%, Si 0.12˜0.30%, Mn 0.30˜0.65%, Cr 0.10˜0.30%, Al≤0.004%, Ti≤0.001%, Cu≤0.01%, Ni≤0.01%, S≤0.01%, P≤0.01%, O≤0.0006%, N≤0.0006%, and the balance is Fe and unavoidable impurity elements. The wire rod for the ultra-thin ultra-high strength steel wire may be used as a base material for producing the ultra-thin ultra-high strength steel wire having a diameter in a range of 50˜60 μm and a tensile strength larger than or equal to 4500 MPa.
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22B 9/18 - Refusion sous laitier électroconducteur
C21D 9/52 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour fils métalliquesTraitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour bandes métalliques
B21B 1/16 - 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 du fil métallique ou un matériau semblable de petite section
56.
400 MPA-GRADE CORROSION-RESISTANT STEEL BAR AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Han
Zhou, Yun
Zhao, Jiaqi
Zhang, Yu
Chen, Huande
Abrégé
Disclosed in the present invention are a 400 MPa-grade corrosion-resistant steel bar and a production method therefor. The steel bar comprises the following chemical components: chromium: 9.5-10.4%, molybdenum: 1.0-1.2%, manganese: 0.3-0.6%, nickel: 0.01-1%, copper: 0.01-0.5%, carbon ≤ 0.014%, nitrogen ≤ 0.004%, niobium: 0.01-0.05%, silicon: 0.2-0.6%, chromium + molybdenum + 0.5 manganese + 0.35 nickel + 0.25 copper being 11.1-12.2%, carbon + nitrogen + 0.3 silicon + manganese + 1.8 niobium being 0.4-0.8%, the remainder being iron.
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C21D 8/08 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de barres ou de fils pour fer à béton
57.
HIGH-STRENGTH STEEL BAR AND PRODUCTION METHOD THEREOF
Disclosed are a high-strength steel bar and a production method therefor. The high-strength steel bar comprises, by mass percentage, the following chemical components: C: 0.15-0.32%, Si+Mn: 0.5-1.9%, Mn+Cr+Mo+Ni: 1.1-2.1%, V: 0.02-0.8%, at least one of Nb, Ti and Al: 0.01-0.3%, and the balance of Fe and inevitable impurities; wherein Mn=(2.5-3.5)Si, and a carbon equivalent satisfies Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15≤0.56%.
C21D 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore
C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
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
C21D 6/00 - Traitement thermique des alliages ferreux
B22D 11/115 - Traitement du métal liquide en utilisant des moyens agitateurs ou vibrants en utilisant des champs magnétiques
58.
HIGH-GRADE NON-ORIENTED SILICON STEEL AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (Chine)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Yue, Chongxiang
Wu, Shengjie
Lu, Jiadong
Li, Hui
Abrégé
Disclosed are high-grade non-oriented silicon steel and a production method therefor. The chemical composition of the non-oriented silicon steel comprises, according to mass percentage: C: 0.002–0.004%, S≤0.003%, Si: 1.4–1.7%, Mn: 0.7–0.95%, P≤0.03%, and Sn: 0.015–0.035%, wherein 11×([Si]-1.4%)=14×([Mn]-0.7%). In the production method for the non-oriented silicon steel, the continuous casting blank heating temperature is 1120–1150°C, the finishing rolling temperature is 890±15°C, the downward-pressing amount of the final instance of finishing rolling is ≥30%, the total downward-pressing amount of the last two instances of finishing rolling is ≥50%, and the coiling temperature is 650±20°C. It is not necessary to perform a normalization treatment before acid continuous rolling, and the obtained non-oriented silicon steel has good magnetic properties, has no corrugation defects on the surface, and meets the requirements of low-cost high-grade non-oriented silicon steel.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 33/04 - Fabrication des alliages ferreux par fusion
59.
WIRE ROD FOR 5000 MPA GRADE DIAMOND WIRE AND PRODUCTION METHOD THEREFOR
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (Chine)
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO. LTD. (Chine)
JIANGSU SHAGANG GROUP CO., LTD. (Chine)
Inventeur(s)
Ma, Han
Shen, Kui
Hu, Xianjun
Wang, Lei
Abrégé
A wire rod for a 5000 MPa grade diamond wire and a production method therefor. The chemical composition of the wire rod comprises in mass percentage: carbon: 1.01 to 1.1%, silicon: 0.15 to 0.4%, manganese: 0.3 to 0.6%, chromium: 0.01 to 0.4%, boron: 0.0005 to 0.002% and/or vanadium: 0.01 to 0.09%; and the balance being iron and impurities, the impurities comprising aluminium ≤ 0.003%, titanium ≤ 0.0008%, sulphur ≤ 0.005%, phosphorus ≤ 0.008%, oxygen ≤ 0.001% and nitrogen ≤ 0.002%. The production method comprises vacuum melting, electroslag remelting and/or vacuum self-consumption, grinding after cogging/forging, rolling and cooling of a high speed wire rod, and initial rolling at 1030-1060 °C. The wire rod has a uniform structure and a tensile strength greater than or equal to 1320 MPa, and can be used for preparing a 5000 Mpa grade diamond wire of 40 to 46μm.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 33/06 - Fabrication des alliages ferreux par fusion en utilisant des alliages-mère
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
A double-roll casting and rolling production method of hot-rolled thin strip steel is disclosed. The method comprises at least one of the following steps: 1) controlling the convexity of the casted strip in the range of 15-60μm; 2) controlling the thickness of the casted strip in the range of 1.65-1.8 mm; 3) controlling the temperature of the casted strip in the range of 1150-1350°C; 4) controlling the pressure of the pinch roller in the range of 16KN-20KN; 5) controlling the tension of the pinch roller in the range of 2.1MPa-2.5MPa; and 6) controlling the evacuation time of the wrapper in the range of 5-10 seconds. A hot-rolled thin strip steel is disclosed. The method can effectively improve the wrinkle of the strip steel.
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
B22D 11/16 - Commande ou régulation des opérations ou du fonctionnement
B22D 11/20 - Commande ou régulation des opérations ou du fonctionnement du retrait des barres coulées
62.
IMPROVING SURFACE QUALITY OF TWIN ROLL CAST AND HOT ROLLED THIN STRIP STEEL
A method for improving the surface quality of a twin roll cast and hot rolled thin strip steel is disclosed. The method comprises: (a) designing a quadratic curve for a full length L of a body of a pinch roll; (b)determining a region H where pinch roll marks on a twin roll cast and hot rolled thin strip steel is formed with a pinch roll having the quadratic curve in step (a); (c) designing a sextic curve in the region H; (d) determining the roll shape curve for the full length L of the pinch roll body.
A boron-added steel and a continuous twin roll strip casting method thereof is disclosed. The steel has a composition of C ≤ 0.10 wt. %, Mn ≤ 2.50 wt. %, Si ≤ 1.50 wt. %, and B ≤ 0.01 wt. % and small concentrations of other elements that are present as deliberate additions and/or unavoidable impurities. Each casting roll is divided into a plurality, typically five, regions along the length of the roll and has different surface textures, such as formed as a pattern of projections in the surface. Where there are five regions, (a) each edge region 1, 5 has a width of ≤40 mm, an arithmetic mean deviation of projections forming the texture of ≤6μm, and an average pitch of projections forming the texture of ≤350 μm, (b) each transition region 2, 4 has a width of ≤20 mm, and (c) a middle region 3 has an arithmetic mean deviation of projections forming the texture of 9-25 μm, and an average pitch of projections forming the texture of 300-850 μm.
C22C 33/04 - Fabrication des alliages ferreux par fusion
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du 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
64.
METHOD FOR PRODUCING BORON-ADDED STEEL BASED ON TWIN-ROLL STRIP CASTING
A method of twin-roll casting a boron-added steel having a composition of C: ≤ 0.03 wt. %, Si:≤ 0.3 wt. %, Mn: 0.3-0.8 wt. %, P: ≤0.02 wt. %, N:≤ 0.008 wt. %, S:≤ 0.003 wt. %, B: 0.0008-0.0015 wt. %, the balance being Fe and unavoidable impurities. The method includes the steps of: smelting the steel composition; strip casting the molten steel into a cast strip through a twin-roll caster; online one-pass hot rolling the cast strip into a hot-rolled strip with a certain thickness with a reduction of 25-60%; obtaining a steel strip with a polygonal ferrite microstructure after cooling and coiling. The boron-added steel has a tensile strength of at least 270 MPa and an elongation of at least 21%.
B21B 1/46 - 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 du métal immédiatement après la coulée continue
65.
RESOURCE RECOVERY METHOD AND RESOURCE RECOVERY SYSTEM FOR DESULFURIZATION ASH
Disclosed are a resource recovery method and a resource recovery system (100) for desulfurization ash. The resource recovery method comprises: water washing desulfurization ash and performing solid-liquid separation to obtain a solid state residue enriched with calcium sulfite and calcium sulfate and a solution enriched with calcium hydroxide; preparing the solution into a desulfurization slurry; and calcining the solid state residue under the action of a reducing agent to obtain a flue gas enriched with sulfur dioxide and a residue enriched with calcium oxide.
F23G 7/00 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets particuliers ou de combustibles pauvres, p. ex. des produits chimiques
B09B 3/00 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif
B09B 5/00 - Opérations non couvertes par une seule autre sous-classe ou par un seul autre groupe de la présente sous-classe
66.
WIRE ROD FOR ULTRAHIGH-STRENGTH STEEL CORD AND MANUFACTURING METHOD THEREFOR
A wire rod for an ultrahigh-strength steel cord and a manufacturing method therefor. The method comprises: smelting molten steel in which the number density of inclusions having a size of greater than or equal to 5 μm is less than or equal to 0.5/mm2, and the inclusion size is less than or equal to 30 μm; casting the molten steel into an ingot blank having a central carbon segregation value of 0.92-1.08; blooming the ingot blank into an intermediate billet having a central carbon segregation value of 0.95-1.05; rolling the intermediate billet into a wire rod; and cooling the wire rod at controlled temperature to obtain a wire rod having high cleanliness, high homogeneity and a tensile strength of less than or equal to 1150 MPa. The wire rod can be used for an ultrahigh-strength steel cord having a single-filament tensile strength of greater than or equal to 3600 MPa.
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
B21B 1/46 - 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 du métal immédiatement après la coulée continue
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 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
B21B 37/48 - Commande de la tensionCommande de la compression
B21B 37/00 - Dispositifs ou procédés de commande spécialement adaptés aux laminoirs ou aux produits laminés
67.
SUPERFINE EXTRA-HIGH-STRENGTH STEEL WIRE, STEEL WIRE ROD, AND PRODUCTION METHOD OF THE STEEL WIRE ROD
INSTITUTE OF RESEARCH OF IRON & STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. (Chine)
JIANGSU SHAGANG GROUP CO. LTD. (Chine)
Inventeur(s)
Hu, Xianjun
Fan, Jinxi
Ma, Han
Fang, Feng
Cheng, Long
Abrégé
Provided are a superfine extra-high-strength steel wire, a steel wire rod for the superfine extra-high-strength steel wire, and a production method thereof. The chemical components of the steel wire rod for the superfine extra-high-strength steel wire includes in percentage by mass: 0.90 to 0.96 percent of C, 0.12 to 0.30 percent of Si, 0.30 to 0.65 percent of Mn, 0.10 to 0.30 percent of Cr, less than or equal to 0.004 percent of Al, less than or equal to 0.001 percent of Ti, less than or equal to 0.01 percent of Cu, less than or equal to 0.01 percent of Ni, less than or equal to 0.01 percent of S, less than or equal to 0.01 percent of P, less than or equal to 0.0006 percent of O, less than or equal to 0.0006 percent of N, and the balance Fe and inevitable impurity elements. The steel wire rod for the superfine extra-high-strength steel wire can be used as base material for producing the superfine extra-high-strength steel wire with the diameter being 50 to 60μm and the tensile strength being larger than or equal to 4500 MPa.
Disclosed are a high-strength steel bar and a production method therefor. The chemical components of the high-strength steel bar comprise, in mass percentage, 0.15-0.32% of C, 0.5-1.9% of Si+Mn, 1.1-2.1% of Mn+Cr+Mo+Ni, 0.02-0.8% of V, and 0.01-0.3% of at least one of Nb, Ti and Al, with the balance being Fe and inevitable impurities, wherein Mn=(2.5-3.5)Si, and carbon equivalent Ceq=C+Mn/6+(Cr+Mo +V)/5+(Cu+Ni)/15≤0.56%.
C21D 8/08 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de barres ou de fils pour fer à béton
69.
HIGH-STRENGTH WEATHER-PROOF THIN STEEL STRIP AND PRODUCTION METHOD THEREFOR
A high-strength weather-proof thin steel strip and a production method therefor. The method comprises the following steps: smelting, wherein components and percentages in weight thereof comprised in the steel are respectively: C: ≤ 0.03; Si: 0.10-0.40; Mn: 1.50-2.00; P: ≤ 0.015; S: ≤ 0.003; Cr: ≤ 0.50; Cu: 0.20-1.00%; and Nb: 0.05-0.50, and the balance being iron and unavoidable impurities; continuous casting of a thin strip: performing continuous casting on molten steel qualified by the smelting to form a cast strip having a thickness of 1.4-2.5 mm by using a pair of casting rollers rotating in opposite directions, wherein the molten steel overheating temperature is controlled to be 100°C or below; online hot rolling of the cast strip, wherein the first-pass hot rolling reduction is 15-65%, and the temperature of the strip steel before entering a rolling mill is 950°C or above; and cooling and coiling: cooling the hot-rolled strip steel to 450-650°C by means of aerosol to obtain acicular ferrite and a small amount of pearlite structures, and then coiling the thin steel strip into a roll by a coiling machine.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
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
70.
METHOD FOR REDUCING ROLLING FORCE OF TWIN ROLL CASTING PRODUCTION LINE ROLLING MILL
A method for reducing the rolling force of a twin roll casting production line rolling mill. The method comprises: qualified molten steel is smelted by a converter or an electric furnace and passed through a tundish, a transitional container, and counter-rotating copper casting rollers to form casted strands of a certain thickness, a certain volume of air and a certain volume of nitrogen are introduced into hot vessel #3 of a twin roll casting production line, the content of air can be controlled independently on the upper and lower surfaces so that an extremely thin oxidized layer is provided on the surfaces of the casted strands; which are hot-rolled, then cooled, and rolled into rolls. By means of the method, the oxide layer provided on the surfaces of the casted strands increases lubrication on the surfaces of the casted strands, thus reducing rolling force and extending the service life of the rollers.
B21B 1/46 - 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 du métal immédiatement après la coulée continue
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
71.
LOW-COST WEATHERING STEEL AND PRODUCTION METHOD THEREOF
Low-cost weathering steel and a production method thereof. The weathering steel comprises components of: less than or equal to 0.03 of C, 0.10-0.50 of Si, 0.50-1.50 of Mn, 0.07-1.50 of P, less than or equal to 0.008 of N, less than or equal to 0.003 of S, less than 0.40 of Cu, less than 0.45 of Cr, and the balance being Fe and inevitable impurities; The protection method comprises the following steps: smelting; carrying out thin-strip continuous casting; continuously casting smelting qualified molten steel into a cast strip having the thickness of 1.4-2.5mm by means of a pair of casting rolls which oppositely rotate, and controlling the casting temperature of the molten steel at 1580-1650°C; carrying out online hot rolling on the cast strip, wherein the cast strip is rolled into a hot rolled thin strip with the thickness of 0.7 to 2.0 mm by means of one-pass hot rolling, the hot rolling reduction is 10-70%, and the temperature of the cast strip entering into a hot rolling mill is greater than 900°C; and after rolling, cooling and reeling, the hot rolled strip steel being cooled to 400 to 500°C by aerosol to obtain a uniform acicular ferrite structure, and soon afterwards reeling into a roll. The yield strength of the low-cost weathering steel is above 345 MPa, and the elongation of the low-cost weathering steel is above 23%. The production control has the characteristics of short production process, low production cost and alloy cost, and excellent surface quality and shape of the hot-rolled strip steel.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
C22C 38/20 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du cuivre
B21B 1/46 - 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 du métal immédiatement après la coulée continue
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
72.
ROLLING METHOD FOR IMPROVING SURFACE QUALITY OF DOUBLE-ROLLER CONTINUOUS CASTING ROLLING STRIP
A rolling method for improving the surface quality of a double-roller continuous casting rolling strip. Two rolling mills (1, 2) are installed on a double-roller continuous casting production line, and the two rolling mills may be independently used or used at the same time; in case of independent use, when one of the rolling mills is used for rolling and a surface problem occurs, the other rolling mill may be used for replacing the rolling mill, and meanwhile, a roller of the fault rolling mill may be replaced on-line; and in case of use at the same time, the rolling strip of the double-roller continuous casting may be rolled to 0.4mm to the thinnest extent. The method solves the problems of frequent casting starts and stops.
B21B 1/46 - 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 du métal immédiatement après la coulée continue
B21B 1/22 - 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
73.
PRODUCTION OF TWIN-ROLL CAST AND HOT ROLLED STEEL STRIP
A method of manufacturing an easy-to-weld twin roll cast and hot-rolled steel strip, such as a Q345 steel strip, having a chemical composition by mass percentage of: C: ≤0.05%; Si: 0.15~0.3%; Mn: ≤0.7%; Nb: ≤0.04%; P: ≤0.03%; S: ≤0.003%; N: ≤0.005%, and the balance being Fe and inevitable impurities is disclosed. The method comprises twin roll casting the molten steel and forming a cast strip having a thickness of 1.4-2.5 mm, hot rolling the cast strip and forming a hot-rolled strip having a thickness of 0.7-1.9 mm by means of a one pass hot rolling step, cooling the hot rolled strip to 400-600°C at a cooling rate of 30-80°C/s, and coiling the cooled hot rolled strip.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/12 - Alliages ferreux, p. ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
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