Method for producing martensitic steel with mixed hardening
US8702879B2 · kind B2 · utility
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Key dates
| Filing date | Jul 2, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jul 14, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a martensitic steel including a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of a last heat shaping pass of the steel is lower than the solubility temperature of aluminum nitrides in the steel, and a treatment temperature for each potential heat treatment after the last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in the steel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.