Martensitic steel with mixed hardening
US9429183B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Jul 16, 2013 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Dec 30, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a method of producing a martensitic steel comprising 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 the last heat shaping pass of said steel is lower than the solubility temperature of the aluminum nitrides in the steel, and the treatment temperature for each potential heat treatment after said last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in said steel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.