An extruded material characterized by containing 8.0-14.0% by mass of Zn, 2.0-4.0% by mass of Mg, 0.5-2.0% by mass of Cu, 0.2-1.5% by mass of Mn, and 0.05-0.3% by mass of Zr, the remainder being Al and unavoidable impurities, and in that the average value of the circle equivalent diameter of an intermetallic compound therein measured using SEM is 3.0 µm or less, and the area ratio of an intermetallic compound having a circle equivalent diameter of 3.0 µm or greater is 4.0% or less.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
A machine component characterized by comprising an aluminium alloy containing 8.0-14.0 mass% of Zn, 2.0-4.0 mass% of Mg, 0.5-2.0 mass% of Cu, 0.2-1.5 mass% of Mn and 0.05-0.3 mass% of Zr, with the remainder being Al and unavoidable impurities, wherein the mean particle diameter of the fine particles within the crystal grains measured by small-angle X-ray scattering is 2-7 nm, the normalized dispersion of the particle size distribution is no more than 45%, the tensile strength is 800 MPa or higher, and the total elongation is 5% or more.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
3.
MACHINE COMPONENT, METHOD FOR PRODUCING SAME, AND EXTRUDED MATERIAL
Provided is a machine component which has a 7000 series aluminum alloy extruded structure that contains, in terms of mass%, 8.0-14.0% of Zn, 2.0-4.0% of Mg, 0.5-2.0% of Cu, 0.2-1.5% of Mn and 0.05-0.3% of Zr, with the remainder comprising Al and unavoidable impurities, and which is characterized in that the structure and characteristics as determined by measuring a surface parallel to the extrusion direction at an intermediate position between a surface and the central axis of the machine component using a SEM-EBSD method are such that the average proportion of small angle grain boundaries having angles of 5-15° is 5% or more, the average proportion of large angle grain boundaries having angles of greater than 15° is 20% or more, the average KAM value is 0.3° or more, the tensile strength is 800 MPa or more and the total elongation is 5% or more. Also provided is a method for producing the machine component, and an extruded material able to produce the machine component.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
This alloy material has a composition of 20-30wt% of silver (Ag), 35-55 wt% vanadium (Pd), and 20-40wt% copper (Cu) in a compositional range for a ternary alloy of Ag, Pd, and Cu, uses said composition as a base, and has added to said base 0.5-2.5 wt% tin (Sn), 0.1-1.0 wt% of one out of cobalt (Co), chromium (Cr), and zinc (Zn) or all three, and 0.01-0.1 wt% of iridium (Ir) or ruthenium (Ru) or both.
C22C 5/04 - Alloys based on a platinum group metal
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
C22F 1/14 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
H01B 1/02 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of metals or alloys
H01R 13/03 - Contact members characterised by the material, e.g. plating or coating materials
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
5.
ALLOY MATERIAL, CONTACT PROBE, AND CONNECTION TERMINAL
This alloy material has copper (Cu) as the main component thereof and has added thereto 10-30 wt% silver (Ag) and 0.5-10 wt% nickel (Ni). As a result, an alloy material having no coating and having excellent Sn-corrosion resistance, a contact probe comprising this alloy material, and a connection terminal can be provided.
Provided is a hollow seamless steel pipe for spring which contains, by mass%, C: 0.2-0.7%, Si: 0.5-3%, Mn: 0.1-2%, Cr: over 0% but not greater than 3 %, Al: over 0 % but not greater than 0.1%, P: over 0% but not greater than 0.02%, S: over 0% but not greater than 0.02%, and N: over 0% but not greater than 0.02%, and the remainder which comprises iron and unavoidable impurities, wherein the uneven thickness rate calculated using formula (1) is equal to or less than 7.0%. Uneven thickness rate = (maximum thickness-minimum thickness)/(average thickness)/2×100 (1)
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 μm or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
B21B 47/00 - Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
B21B 19/04 - Rolling basic material of solid, i.e. non-hollow, structurePiercing
B21B 1/42 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for step-by-step or planetary rolling
B21F 3/02 - Coiling wire into particular forms helically
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Provided are an alloy material having excellent electrical conductivity and high hardness and excellent workability for use in a contact probe, a contact probe consisting of this alloy material, and a connection terminal. In a compositional range of a ternary alloy of silver (Ag), palladium (Pd) and copper (Cu), Ag accounts for 17-25 at%, Pd accounts for 30-45 at% and Cu accounts for 30-53 at%, at least one of manganese (Mn), tin (Sn), silicon (Si), antimony (Sb), titanium (Ti) and magnesium (Mg) is added at a quantity of 4.5 at% or lower relative to this basic composition, and further, 0.5-3.5 at% of Mn, 1-2 at% of Sn, 0.5-2 at% of Si, 0.5-3 at% of Sb, 0.5-2 at% of Ti and 0.5-3.5 at% of Mg are added relative to this basic composition.
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
C22C 5/04 - Alloys based on a platinum group metal
C22F 1/14 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
A seamless steel pipe for a hollow spring, containing 0.2 to 0.7 mass% of C, 0.5 to 3 mass% of Si, 0.1 to 2 mass% of Mn, up to 3 mass% (exclusive of 0 mass%) of Cr, up to 0.1 mass% (exclusive of 0 mass%) of Al, up to 0.02 mass% (exclusive of 0 mass%) of P, up to 0.02 mass% (exclusive of 0 mass%) of S and up to 0.02 mass% (exclusive of 0 mass%) of N. The content of retained austenite in the inner surface layer of the steel pipe is 5 vol% or less. The average grain diameter of ferrite/pearlite phase in the inner surface layer of the pipe is 18μm or less. The number density of carbide particles which have equivalent circle diameters of 500nm or more and which are present in the inner surface layer of the pipe is 1.8×10-2/μm2 or less.
This hollow seamless pipe for high-strength springs comprises a steel material having a properly regulated chemical composition, wherein the inner surface part has a total decarburized depth of 100 µm or less, any flaw present in the inner surface has a depth of 40 µm or less and a width of 60 µm or less, and carbide grains having a size of 500 nm or larger in terms of equivalent-circle diameter are present in the inner surface part at a population density of 1.8×10-2 grains/µm2 or less.
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
Provided is a hollow seamless pipe for high-strength springs. In the hollow seamless pipe, the decarburization in the inner and outer peripheral surfaces is extremely reduced, so that the outer and inner peripheral surface layers can be sufficiently hardened in the quenching step in producing springs. Thus, the hollow seamless pipe ensures sufficient fatigue strength of springs. The hollow seamless pipe consists of a steel which contains 0.2 to 0.7mass% of C, 0.5 to 3mass% of Si, 0.1 to 2mass% of Mn, more than 0 to 0.1mass% of Al, more than 0 to 0.02mass % of P, more than 0 to 0.02mass% of S, and more than 0 to 0.02mass% of N. The contents of C in the inner and outer peripheral surfaces of the hollow seamless pipe are 0.10mass % or more, and the thicknesses of the total decarburized layers present respectively in the inner and outer peripheral surfaces thereof are 200μm or less.
C21D 7/12 - Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
Provided is a multilayered tube by which a heat insulation effect and a vibration suppression effect can be obtained, and the structure of an exhaust system using the multilayered tube can be further compacted to a conventional exhaust system. A multilayered tube (1) to be connected to a vibration suppression source when being used is comprised of an inner tube (2); an outer tube (4) coaxially disposed with the inner tube (2) on the outside of the inner tube (2); and a heat insulation and vibration suppression element (3) provided between the inner tube (2) and the outer tube (4). The inner tube (2) and the outer tube (4) are composed of metal tubes having different natural frequencies, or metal tubes having different vibration modes with respect to the same natural frequency.
A highly durable seamless steel pipe; a hollow spring utilizing the seamless steel pipe; and a process for manufacturing a seamless steel pipe in which such a seamless steel pipe can be manufactured while ensuring high production efficiency, high product quality and low cost. There is provided seamless steel pipe (1) manufactured through at least the hot hydrostatic extrusion step (C) of carrying out hot hydrostatic extrusion of cylindrical steel material billet (2) so as to produce seamless steel pipe intermediate (1a), wherein the depth of each of continuous dents appearing on the inner circumferential surface and outer circumferential surface of the steel pipe as measured from the relevant surface is not greater than 50 騜m. Further, there is provided a process for manufacturing a seamless steel pipe, comprising the steps of billet forming (A), first heating (B), hot hydrostatic extrusion (C), second heating (D), extending (F)/(G), third heating (H) and pickling (I).
B21C 1/22 - Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles
Disclosed is a wear-resistant member comprising an Ni-P plating film which is formed on a base and excellent in wear resistance, fatigue characteristics and corrosion resistance. The Ni-P plating film is composed of an Ni alloy containing, in mass%, 85-98.9% of Ni, 1-5% of P and 0.1-1% of NH4 group, and the average crystallite size of the film according to Ni-P plating film structure analysis by x-ray diffraction is 1-5 nm. In addition, the Ni-P plating film as just plated has a hardness of not less than 500 Hv. Also disclosed is a power transmission component using such a wear-resistant member.
patents
