Method for manufacturing high strength hot rolled steel sheet
US8646301B2 · kind B2 · utility
1Cited by
8References
2Claims
0Family size
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Key dates
| Filing date | Aug 20, 2008 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Sep 3, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.