Powdered metal valve seat insert
US4724000A · kind A · utility
27Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Oct 29, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0285
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Wear resistant articles, especially valve seat inserts for internal combustion engines, are produced as sintered metal compacts comprising interspersed microzones of prealloyed austenitic stainless steel and softer ferrous metal, the microzones of austenitic stainless steel containing carbides and carbonitrides. The sintered compacts can be made by forming a green compact from prealloyed austenitic stainless steel powder atomizate blended with softer powdered ferrous metal component and powdered carbon, and sintering the green compact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.