Sintered alloy for valve seat and manufacturing method of exhaust valve seat using the same
US9175584B2 · kind B2 · utility
6Cited by
4References
6Claims
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Key dates
| Filing date | Dec 18, 2012 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Oct 7, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2003/248
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sintered alloy for a valve seat may be manufactured using a method including: mixing MnS with an alloy powder for a valve seat including C at 0.8-1.2 wt %, Ni at 2.0-4.5 wt %, Cr at 3.0-5.0 wt %, Mo at 16.0-20.0 wt %, Co at 9.0-13.0 wt %, V at 0.05-0.15 wt %, S at 0.2-0.8 wt %, Fe, and additional inevitable impurities; making a first shape by forming the mixed materials; pre-sintering the first formed shape; making a secondary shape by re-pressing the first pre-sintered shape; main-sintering the secondary shape; and tempering the main-sintered secondary shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.