Low carbon resulfurized free-machining steel having high machinability
US8052925B2 · kind B2 · utility
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Key dates
| Filing date | Sep 7, 2006 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0226
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A low carbon resulfurized free-machining steel having a high machinability is provided. This steel comprises 0.02 to 0.15% by mass of C, up to 0.004% by mass (more than 0% by mass) of Si, 0.6 to 3% by mass of Mn, 0.02 to 0.2% by mass of P, 0.2 to 1% by mass of S, up to 0.005% by mass (more than 0%) of Al, 0.008 to 0.04% by mass of O, and 0.002 to 0.03% by mass of N; and the average oxygen concentration in the MnS in the steel is at least 0.4% by mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.