Heat resisting alloy for exhaust valve and method for producing

Details Heat resisting alloy for exhaust valve and method for producing Heat resisting alloy for exhaust valve and method for producing

1998-07-13

2000-08-08

Ip, Sikyin

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148608, C21D 602

Patent

active

060996684

ABSTRACT:
A method for producing an exhaust valve is described, comprising subjecting a raw material of a specified heat resisting alloy to solid solution treatment; forming a head portion of the exhaust valve from the solution treated raw material through cold working or warm working; joining a stem portion made of martensitic heat resisting steel to said head portion of the exhaust valve; and subjecting the head portion and the stem portion joined with each other to aging treatment.

REFERENCES:
patent: 4767597 (1988-08-01), Nishino et al.

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