Hot-pressed steel sheet member and method for producing same
US11339452B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Nov 7, 2018 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Mar 13, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a hot-pressed steel sheet member having a tensile strength of 1780 MPa or more and excellent bending collapsibility. The hot-pressed steel sheet member includes: a specific chemical composition; a microstructure in which an average grain size of prior austenite grains is 8 μm or less, a volume fraction of martensite is 90% or more, and a solute C content is 25% or less of a total C content; and a tensile strength of 1780 MPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.