US 2022/0010450 A1 · Ni-COATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AFTER WORKING AND METHOD FOR MANUFACTURING Ni-COATED STEEL SHEET

Abstract

A Ni-coated steel sheet according to an aspect of the present invention includes: a base steel sheet; a diffusion alloy layer disposed on the base steel sheet; and a Ni-coated layer disposed on the diffusion alloy layer, in which a depth-hardness curve obtained by continuously performing Vickers hardness measurement on a cross section perpendicular to a rolled surface of the base steel sheet from a surface layer of the Ni-coated layer to the base steel sheet using a nanoindenter includes, in the diffusion alloy layer, a peak indicating a Vickers hardness of 1.50 times or more a Vickers hardness of the surface layer of the Ni-coated layer.

Claims4

Dependent claims

A Ni-coated steel sheet having excellent corrosion resistance after working, comprising:

a base steel sheet;
a diffusion alloy layer disposed on the base steel sheet;
and
a Ni-coated layer disposed on the diffusion alloy layer,
wherein a depth-hardness curve obtained by continuously performing Vickers hardness measurement on a cross section perpendicular to a rolled surface of the base steel sheet from a surface layer of the Ni-coated layer to the base steel sheet using a nanoindenter includes, in the diffusion alloy layer, a peak indicating a Vickers hardness of 1.50 times or more a Vickers hardness of the surface layer of the Ni-coated layer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/291,846Filed 20 Dec 2019

Priority

JP 2018-24598527 Dec 2018

Published

13 Jan 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

C25D 5/14
At least one layer being of nickel or chromium: two or more layers being of nickel or chromium, e.g. duplex or triplex layers
B32B 15/013
All layers being exclusively metallic: one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or…
C21D 1/26
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering: methods of annealing
C21D 9/46
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor: for sheet metals

Ni-COATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AFTER WORKING AND METHOD FOR MANUFACTURING Ni-COATED STEEL SHEET

Life of this patent

Ni-COATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AFTER WORKING AND METHOD FOR MANUFACTURING Ni-COATED STEEL SHEET

Life of this patent

Abstract

Claims4