High strength steel sheet having excellent hydrogen embrittlement resistance
US9464337B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | May 28, 2010 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | May 29, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.