Nickel-plated, heat-treated steel sheet for battery cans
US-2018366691-A1 · Dec 20, 2018 · US
Ni-COATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AFTER WORKING AND METHOD FOR MANUFACTURING Ni-COATED STEEL SHEET
US2022010450A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022010450-A1 |
| Application number | US-201917291846-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 20, 2019 |
| Priority date | Dec 27, 2018 |
| Publication date | Jan 13, 2022 |
| Grant date | — |
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Abstract
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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.
First claim
Opening claim text (preview).
1 . 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 . The Ni-coated steel sheet having excellent corrosion resistance after working according to claim 1 , wherein a Ni coating weight per one surface is 10 g/m 2 or more. 3 . A method for manufacturing the Ni-coated steel sheet having excellent corrosion resistance after working according to claim 1 , the method comprising: primary Ni coating by electric-energizing a base steel sheet with a current density of 60 to 100 A/dm 2 ; secondary Ni coating by electric-energizing the base steel sheet with a current density of 30 A/dm 2 or less after the primary Ni coating; and annealing the base steel sheet after the secondary Ni coating, wherein a Ni coating weight in the primary Ni coating is set to 1 to 10 g/m 2 , and a Ni coating weight in the secondary Ni coating is set to 2 g/m 2 or more. 4 . A method for manufacturing the Ni-coated steel sheet having excellent corrosion resistance after working according to claim 2 , the method comprising: primary Ni coating by electric-energizing a base steel sheet with a current density of 60 to 100 A/dm 2 , secondary Ni coating by electric-energizing the base steel sheet with a current density of 30 A/dm 2 or less after the primary Ni coating; and annealing the base steel sheet after the secondary Ni coating, wherein a Ni coating weight in the primary Ni coating is set to 1 to 10 g/m 2 , and a Ni coating weight in the secondary Ni coating is set to 2 g/m 2 or more.
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Classifications
After-treatment · CPC title
Methods of annealing · CPC title
only coatings {only including layers} of metallic material · CPC title
by heat-treatment · CPC title
Solid state diffusion of only metal elements or silicon into metallic material surfaces · CPC title
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- What does patent US2022010450A1 cover?
- 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 fr…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C25D5/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jan 13 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).