High-strength thin steel sheet and method for manufacturing the same
US10526678B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jul 5, 2016 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Jan 8, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This disclosure provides a predetermined composition, where a conversion value C* of total carbon contents in Ti, Nb and V precipitates whose grain sizes are less than 20 nm is 0.010 mass % to 0.100 mass %, Fe content in Fe precipitates is 0.03 mass % to 0.50 mass %, and an average grain size of ferrite grains whose grain sizes are top 5 % large in ferrite grain size distribution of rolling direction cross section is (4000/TS)2 μm or less, the TS indicating tensile strength in unit of MPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.