Ferrite-martensite dual-phase stainless steel and method of manufacturing the same
US10745774B2 · kind B2 · utility
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Key dates
| Filing date | Oct 27, 2014 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Feb 8, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ferrite-martensite dual-phase stainless steel has satisfactory corrosion resistance and workability for a material for the body of a freight car and excellent low-temperature toughness. The ferrite-martensite dual-phase stainless steel has a specified chemical composition, in which inequalities (I) and (II) below are satisfied, and a steel microstructure including a dual phase of a ferrite phase and a martensite phase, in which the content of the martensite phase is 5% or more and 95% or less in terms of vol. %: 10.5≤Cr+1.5×Si≤13.5 (I)1.5≤30×(C+N)+Ni+0.5×Mn≤6.0 (II),
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.