Surface-treated steel sheet and method for manufacturing surface-treated steel sheet
US-11352682-B2 · Jun 7, 2022 · US
Surface-treated steel sheet
US2023415453A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023415453-A1 |
| Application number | US-202118035988-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 29, 2021 |
| Priority date | Dec 3, 2020 |
| Publication date | Dec 28, 2023 |
| Grant date | — |
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Abstract
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The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes a plurality of high Co concentration regions in each of which the ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8.
First claim
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1 . A surface-treated steel sheet, comprising: a steel sheet, and an alloy layer containing Ni and Co on a surface of the steel sheet, wherein in a case where, in a cross section obtained by cutting the alloy layer in a thickness direction, a range having a width of 2000 nm and extending from a surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes: a plurality of high Co concentration regions in each of which a ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8, the plurality of alloyed regions being arranged alternately with the high Co concentration regions. 2 . The surface-treated steel sheet according to claim 1 , wherein: in the range which, in the cross section obtained by cutting the alloy layer in the thickness direction of the alloy layer, has a width of 2000 nm and extends to a depth of 100 nm from the surface of the alloy layer, a ratio of an area of the high Co concentration regions to an area of the alloyed regions is 0.10 to 4.00. 3 . The surface-treated steel sheet according to claim 1 , wherein: per side of the steel sheet, a content of Ni in the alloy layer is 1.34 to 5.36 g/m 2 , and a content of Co in the alloy layer is 0.45 to 1.34 g/m 2 . 4 . The surface-treated steel sheet according to claim 1 , wherein: per side of the steel sheet, a content of Ni in the alloy layer is 5.36 to 35.6 g/m 2 , and a content of Co in the alloy layer is 0.45 to 1.34 g/m 2 . 5 . The surface-treated steel sheet according to claim 2 , wherein: per side of the steel sheet, a content of Ni in the alloy layer is 1.34 to 5.36 g/m 2 , and a content of Co in the alloy layer is 0.45 to 1.34 g/m 2 . 6 . The surface-treated steel sheet according to claim 2 , wherein: per side of the steel sheet, a content of Ni in the alloy layer is 5.36 to 35.6 g/m 2 , and a content of Co in the alloy layer is 0.45 to 1.34 g/m 2 .
Assignees
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Classifications
during manufacturing of plates or strips (C21D8/12 takes precedence) · CPC title
- B32B15/015Primary
the said other metal being copper or nickel or an alloy thereof · CPC title
containing aluminium · CPC title
containing manganese · CPC title
containing silicon · CPC title
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- What does patent US2023415453A1 cover?
- The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer …
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B32B15/015. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 28 2023 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).