Hot-rolled steel sheet and method for manufacturing same
US12428694B2 · kind B2 · utility
0Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Oct 21, 2019 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Dec 16, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This hot-rolled steel sheet has a predetermined chemical composition, and in a case where the thickness is denoted by t, the metallographic structure at a t/4 position from the surface contains one or both of tempered martensite and lower bainite at a volume percentage of 90% or more, the tensile strength is 980 MPa or more, and the average Ni concentration on the surface is 7.0% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.