Hot-rolled steel sheet
US12297524B2 · kind B2 · utility
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2References
5Claims
0Family size
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Key dates
| Filing date | Sep 4, 2020 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Oct 16, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This hot-rolled steel sheet has a predetermined chemical composition, in which a microstructure contains, by area %, less than 3.0% of residual austenite, 15.0% or more and less than 60.0% of ferrite, and less than 5.0% of pearlite, has a ratio L60/L7 of a length L60 of a grain boundary having a crystal misorientation of 60° to a length L7 of a grain boundary having a crystal misorientation of 7° about a <110> direction of less than 0.60, has a standard deviation of a Mn concentration of 0.60 mass % or less, and has a tensile strength of 980 MPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.