Martensite-based stainless steel component and method for manufacturing the same
US11572598B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2019 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Feb 17, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2241/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a martensite-based stainless steel component that has a nitride layer on a surface of a martensite-based stainless steel with a constituent composition including, in percent by mass, 0.25 to 0.45% of C, 1.0% or less of Si, 0.1 to 1.5% of Mn, 12.0 to 15.0% of Cr, and 0.5 to 3.0% of Mo, with a remainder being Fe and impurities, wherein hardness at a position of a depth of 0.1 mm from a surface of the martensite-based stainless steel component is 650 HV or more, and a number density of carbide with an equivalent circle diameter of 1 μm or more is 100 particles/10000 μm2 in a sectional structure at the position of the depth of 0.1 mm from the surface of the martensite-based stainless steel component. Also, a method for manufacturing the martensite-based stainless steel component is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.