Nisshin Steel Co.

Kure Hiroshima, Japan

Nisshin Steel Co.

Kure Hiroshima, Japan
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Patent
Nisshin Steel Co. | Date: 2017-04-05

[Problem] The invention is intended to improve the galling resistance of the hot-dip Al-based alloy coated layer of a hot-dip Al-based alloy coated steel sheet. [Solution] Provided is a hot-dip Al-based alloy coated steel sheet excellent in workability that comprises a hot-dip Al-based alloy coated layer of a composition containing 1.0 to 12.0 mass% of silicon and 0.002 to 0.080 mass% of boron and formed on a surface of a substrate steel sheet, the coated layer having an I_(MAX)/I_(0) ratio of 2.0 or more as measured by GDS (glow discharge optical emission spectrometry) analysis from the outermost surface into the depth of the coated layer, where I_(MAX) is the maximum detection intensity of boron in regions with a sputter depth of 0 to 1.0 m, and I_(0) is the average detection intensity of boron within a sputter depth of 1.0 to 5.0 m.


Provided is a coated metal sheet for exterior use, having a metal sheet, and a top coat film situated on the metal sheet. The top coat film contains 0.2-15 volume percent of a gloss control agent composed of porous particles and a delustering agent composed of primary particles. The coated metal sheet satisfies the following expressions in which, in the number-size distribution of the gloss control agent and the delustering agent, R is the number-average particle diameter (m) of the gloss control agent, D1_(97.5) and D2_(97.5) are 97.5% particle diameter values (m) of the gloss control agent and the delustering agent, Ru is the upper limit particle diameter (m) of the gloss control agent, and T is the film thickness (m) of the top coat film.


Patent
Nisshin Steel Co. | Date: 2017-02-08

Problem To provide a heat resistant metal gasket that is controlled to have a strength level (ordinary temperature hardness) capable of facilitating processing, and has excellent gas leak resistance. Solution An austenitic stainless steel sheet for a metal gasket, having a chemical composition containing from 0.015 to 0.200% of C, from 1.50 to 5.00% of Si, from 0.30 to 2.50% of Mn, from 7.0 to 17.0% of Ni, from 13.0 to 23.0% of Cr, and from 0.005 to 0.250% of N, all in terms of percentage by mass, containing, as necessary, at least one of Mo, Cu, Nb, Ti, V, Zr, W, Co, B, Al, REM (rare-earth element except for Y), Y, Ca and Mg, with the balance of Fe and unavoidable impurities, having an ordinary temperature hardness of 430 HV or less, having a half width of a peak of an austenite crystal (311) plane in an X-ray diffraction pattern of a cross section perpendicular to a sheet thickness direction of from 0.10 to 1.60, and having a surface roughness Ra of 0.30 m or less.


Patent
Nisshin Steel Co. | Date: 2017-02-01

This coated metal plate is a chromate-free coated metal plate for exterior applications, which comprises a metal plate and a coating film that is arranged on the metal plate. The coating film contains 0.2-15vol% of porous particles as a gloss control agent, and contains 0.2-15vol% of primary particles as a matting agent. If R1 (m) is the number average particle diameter of the gloss control agent, R2 (m) is the number average particle diameter of the matting agent, T (m) is the film thickness of the coating film, 1 (m) is the standard deviation of the number-based particle size distribution of the gloss control agent and 2 (m) is the standard deviation of the number-based particle size distribution of the matting agent, the coated metal plate satisfies the following formulae.


The coated metal plate pertaining to the present invention is a coated metal plate for exterior use, and has a metal plate and a top coating film disposed on the metal plate. The top coating film contains 0.01-15 vol% of porous particles as a gloss adjusting agent, and the coated metal plate satisfies the expressions below. In the expressions below, R is the number-average particle diameter (m), D_(97.5) is the diameter (m) of 97.5% of the particles, Ru is the upper limit particle diameter (m), and T is the film thickness (m) of the top coating film in the number particle size distribution of the gloss adjusting agent. D_(97.5)/T 0.7; Ru 1.2T; R 1.0; 3 T 20.


Patent
Nisshin Steel Co. | Date: 2017-03-08

Provided is a martensitic stainless-steel sheet having a reduced anisotropy in workability and fatigue resistance which are attributable to oxide based inclusions. A martensitic stainless-steel sheet which has a steel composition that contains, in terms of mass%, 0.030 to 0.300% C, 0.20 to 2.50% Si, 0.15 to 4.00% Mn, 0.01 to 1.00% Ni, 11.00 to 15.00% Cr, 0.001 to 0.100% N, 0.0001 to 0.0350% Al, 0 to 0.50% V, 0 to 0.50% Nb, 0 to 0.50% Ti, 0 to 0.020% B, and a balance of Fe and unavoidable impurities, and that has a value of max, determined by the following equation (1), of 80.0 or greater, and in which oxide based inclusions are observed in the metallographic structure, the oxide based inclusions having a converted composition comprising up to 30 mass% or less Al_(2)O_(3), 20 to 60 mass% SiO_(2), and 15 to 70 mass% MnO.


Patent
Nisshin Steel Co. | Date: 2017-03-29

A connecting component material used as a material constituting a connecting component, wherein the connecting component material is obtained by using a Ni-plated metal plate in which a Ni plating layer is formed on the surface of a metal plate, and the average depth (R) of a surface roughness motif in at least one direction on the surface of the Ni plating layer is 1.0 m or above, and by forming a Sn plating layer having a thickness of 0.3 to 5 m on the Ni plating layer of the Ni-plated metal plate; the connection component material makes it possible to reduce friction and minimize abrasion of the material when a connecting component such as an electrical connection terminal is fitted, and to improve the reliability of a stable electrical connection; and the connecting component material can be used in e.g., electrical contact components such as lead frames, harness plugs, and connectors used in electrical and electronic devices and the like.


Patent
Nisshin Steel Co. | Date: 2017-01-25

A coated steel sheet comprises: a steel sheet; a primer coating film which is arranged on the steel sheet and comprises an anti-corrosive pigment and an aggregate composed of primary particles; and a top coating film which is arranged on the primer coating film. The anti-corrosive pigment comprises at least one compound selected from the group consisting of a bivalent tin salt, a trivalent vanadium salt, a tetravalent vanadium salt, a tetravalent molybdenum salt, an oxycarboxylic acid salt, an ascorbic acid, a phosphorous acid salt and a hypophosphorous acid salt.


Patent
Nisshin Steel Co. | Date: 2017-02-01

This coated metal plate is a chromate-free coated metal plate for exterior applications, which comprises a metal plate and a coating film that is arranged on the metal plate. The coating film contains 0.01-15% by volume of porous particles as a gloss control agent. If R (m) is the number average particle diameter of the gloss control agent, T (m) is the film thickness of the coating film, and is the standard deviation of the number-based particle size distribution of the gloss control agent, the coated metal plate satisfies the following formulae. (R + 2)/T 0.7 R 2.0 9 T 19.


Patent
Nisshin Steel Co. | Date: 2017-04-19

The invention provides a formed material manufacturing method by which unnecessary thickening of a flange can be avoided, a formed material can be reduced in weight, a base metal sheet can be reduced in size, uniformity of flange thickness can be improved, and a highly accurate flatness can be obtained, and the invention also to provide a formed material. The formed material manufacturing method allows a formed material to be manufactured by forming processes that include at least one drawing-out process, at least one drawing process performed after the drawing-out process, and at least one coining process performed after the drawing process. The width of the rear end side of a punch 31 used in the drawing-out process is set to be wider than the width of the tip end side thereof. An ironing process is performed on a region corresponding to the flange of the base metal sheet by pushing the base metal sheet together with the punch 31 into a pushing hole 30a.

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