Ti alloy poppet valve and a method of manufacturing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 28, 2003
Grant Date -
Jan 31, 2002
app pub date -
Feb 22, 2001
filing date -
Jul 18, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
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. O.sub.2 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.
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