Abrasion resistant iron base sintered alloy material for valve seat and valve seat made of iron base sintered alloy
US6139599A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A valve seat made of an iron base sintered alloy for internal combustion engines comprises of hard particles of hardness 700-1300 Hv dispersed by 3-20% by volume in a matrix phase comprising comprising of a 5-40% psarlite phase, a 20-60% fine carbide dispersed phase, and a 5-20% high alloy diffusd phase. The hard paricles are preferably selected from a group of Mo--Ni--Cr--Si--Co intermetallic compound particles, Cr--Mo--Co intermetallic compound particles, and Fe--Mo alloy particles. The iron base sinteed alloy is conpised of, by weight, C: 0.2-2.0%, Cr: 1.0-9.0%, Mo: 1.0-9.0%, Si: 0.1-1.0%, W: 1.0-50%, V: 0.2-3.0%, one or more Cu, Co and Ni of 0.5-10.0% in total, and the remainder substantial Fe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.