Steel, for hot forming or quenching in a tool, having improved ductility
US8722203B2 · kind B2 · utility
8Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Mar 3, 2008 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Mar 3, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12972
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a steel part, the composition of the steel of which comprises, the contents being expressed by weight: 0.040%≦C≦0.100%; 0.80%≦Mn≦2.00%; Si≦0.30%; S≦0.005%; P≦0.030%; 0.010% S≦Al≦0.070%; 0.015%≦Nb≦0.100%; 0.030% Ti≦0.080%; N≦0.009%; Cu≦0.100%; Ni≦0.100%; Cr≦0.100%; Mo≦0.100%; and Ca≦0.006%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% equiaxed ferrite, martensite in an amount not less than 5% but not exceeding 20%, and bainite in an amount not exceeding 10%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.