Ti alloy surface treatment
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United States of America Patent
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-
Jul 15, 2003
Grant Date -
Mar 13, 2003
app pub date -
Nov 21, 2001
filing date -
Sep 3, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Ti alloy is embedded in a powder such as graphite and heated with the powder in an oxygen atmosphere. Oxygen atoms are diffused into the Ti alloy to form an oxygen diffusion layer of Ti--O solid solution, thereby increasing wear resistance of the valve. A poppet valve in an internal combustion engine may be made of such Ti alloy.
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