Ti alloy poppet valve and a method of manufacturing the same
US6623568B2 · kind B2 · utility
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6References
8Claims
0Family size
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Key dates
| Filing date | Oct 21, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Oct 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A Ti alloy poppet valve consists of a valve stem and a valve head, and is employed as intake or exhaust valve in an internal combustion engine of an automobile. O2 is put into the valve in a furnace at very slight amount and heated to introduce oxygen atoms into titanium of the valve to form a Ti—O interstitial solid solution without making titanium oxides. The valve is strengthened to increase hardness and wear resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.