Very-high-strength and low-density, hot-rolled steel sheet and manufacturing process
US7416615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | May 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a high-resistant, low-density hot laminated sheet steel comprising the following elements expressed in weight per cent: 0.04%:9 carbon≦0.5%; 0.05%≦manganese≦3%, being able to contain hardening elements: 0.01%≦niobium≦0.1 0.01%≦titanium≦0.2% 0.01≦vanadium≦0.2%, either individually or combined, and/or elements acting on the transformation temperatures, 0.0005%≦boron≦0.005%; 0.05%≦nickel≦2%; 0.05%≦chrome≦2%; 0.05%≦molybdenum≦2%, either individually or combined, the remainder being iron and elements which are inherent to production, characterized in that it comprises: 2%≦silicon≦10%; 1%≦aluminium≦10%. The invention also relates to the production thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.