Flat product, such as sheet, made of steel having a high yield strength and exhibiting good ductility and process for manufacturing this product
US6395108B2 · kind B2 · utility
53Cited by
5References
36Claims
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Key dates
| Filing date | Apr 30, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0226
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A flat product made of multiphase steel and a method for preparing the steel includes hot rolling at a temperature at which the austenite phase is stable, then tempering to form a C and Mn-enriched phase in a matrix, followed by a heat treatment to form austenite islands and/or enriching in Mn the already formed austenite and cooling down to room temperature so as to obtain a final product with a ferrite matrix containing residual austenite, bainite and/or martensite islands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.