Metal treatment – Stock – Titanium – zirconium – or hafnium base
Patent
1992-01-28
1992-12-08
Roy, Upendra
Metal treatment
Stock
Titanium, zirconium, or hafnium base
1231883, 148669, 148670, 251368, 420420, C22C 100
Patent
active
051694603
ABSTRACT:
There is disclosed an engine valve of titanium alloy having a stem portion made of a cold-worked titanium alloy containing 2% to 4% by weight of aluminum, 1.5% to 3.5% by weight of vanadium and balance titanium. The engine valve suitable for use as an intake valve has a head portion made of a cast titanium alloy containing 2% to 7% by weight of aluminum, 3% to 20% by weight of vanadium and balance titanium. Moreover, an exhaust engine valve has a head portion made of a cast titanium alloy containing 5% to 10% by weight of aluminum and balance titanium.
REFERENCES:
patent: 4073474 (1978-02-01), Hashimoto et al.
patent: 4433652 (1984-02-01), Holtzberg et al.
patent: 4729546 (1988-03-01), Allison
patent: 4852531 (1989-08-01), Abkovitz et al.
patent: 4867116 (1989-09-01), Rosa et al.
Mitsubishi Materials Corporation
Roy Upendra
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