Hot-rolled steel sheet
US12203157B2 · kind B2 · utility
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Key dates
| Filing date | Jan 30, 2020 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Apr 6, 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, in which a metallographic structure contains, by area %, 3.0% or more of retained austenite, has a ratio L52/L7 of a length L52 of a grain boundary having a crystal misorientation of 52° to a length L7 of a grain boundary having a crystal misorientation of 7° about a <110> direction of more than 0.18, has a standard deviation of a Mn concentration of 0.60 mass % or less, and has a tensile strength of 1180 MPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.