Engine valve stem as well as head portion of titanium alloy

Details Engine valve stem as well as head portion of titanium alloy Engine valve stem as well as head portion of titanium alloy

1991-01-17

1992-05-12

Roy, Uprendra

Metal treatment

Stock

Titanium, zirconium, or hafnium base

123188AA, 1231883, 148 115F, 148 127B.133, 148527, 420420, F01L 300

Patent

active

051124157

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: 3795970 (1974-03-01), Keathley et al.
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), Abkowitz et al.
patent: 4867116 (1989-08-01), Rosa et al.

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