Low-density hot-or cold-rolled steel, method for implementing same and use thereof
US10900105B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2013 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rolled steel sheet is provided. The rolled steel sheet has a mechanical strength greater than or equal to 600 MPa and an elongation at fracture that is greater than or equal to 20%. A a method for its fabrication is also provided. The chemical composition of the steel sheet includes 0.10≤C≤0.30%, 6.0≤Mn≤15.0%, 6.0≤Al≤15.0%, and optionally one or more elements selected from among: Si≤2.0%, Ti≤0.2%, V≤0.6% and Nb≤0.3%. The remainder of the composition includes iron and the unavoidable impurities resulting from processing. The ratio of the weight of manganese to the weight of aluminum is such that The microstructure of the sheet includes ferrite, austenite and up to 5% Kappa precipitates in area fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.