High-strength steel sheet having excellent delayed fracture resistance
US12286683B2 · kind B2 · utility
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Key dates
| Filing date | Dec 28, 2020 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | May 16, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength steel sheet with excellent delayed fracture resistance, having a tensile strength of 1700 MPa or larger, including a predetermined component composition, having a martensite structure whose ratio accounts for 95 area % or more of the entire metallographic structure, and having a transition metal carbide whose ratio accounts for 0.8 volume % or more of the entire metallographic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.