Heat resisting alloy for exhaust valve and method for producing the exhaust valve
US6099668A · kind A · utility
9Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Jul 13, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing an exhaust valve is described, comprising subjecting a raw material of a specified heat resisting alloy to solid solution treatment; forming a head portion of the exhaust valve from the solution treated raw material through cold working or warm working; joining a stem portion made of martensitic heat resisting steel to said head portion of the exhaust valve; and subjecting the head portion and the stem portion joined with each other to aging treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.