Hot-rolled steel sheet
US12116646B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Mar 8, 2021 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Jul 1, 2041 |
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, in a microstructure, by area %, ferrite is less than 15.0%, residual austenite is less than 3.0%, L52/L7, which is a ratio of a length L52 of a grain boundary having a crystal orientation difference of 52° to a length L7 of a grain boundary having a crystal orientation difference of 7° about a <110> direction is 0.10 to 0.18, a standard deviation of a Mn concentration is 0.60 mass % or less, and a tensile strength is 980 MPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.