Martenstitic stainless steel with improved machinability
US5427635A · kind A · utility
9Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Jun 13, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The subject of the invention is a martensitic stainless steel with improved machinability, characterized in that its weight composition is the following: PA1 carbon lower than 1.2% PA1 silicon lower than or equal to 2% PA1 manganese lower than or equal to 2% PA1 chromium: 10.5.ltoreq.Cr.ltoreq.19% PA1 sulphur lower than or equal to 0.55% PA1 calcium higher than 32.times.10.sup.-4 % PA1 oxygen higher than 70.times.10.sup.-4 % PA1 the ratio of the calcium and oxygen content Ca/O being 0.2.ltoreq.Ca/O.ltoreq.0.6, the said steel being subjected to at least one quenching heat treatment to give it a martensitic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.