Solution heat treating of engine poppet valves

Details Solution heat treating of engine poppet valves Solution heat treating of engine poppet valves

1984-05-07

1985-10-15

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148142, 148145, 148149, 123188AA, C21D 126

Patent

active

045472297

ABSTRACT:
A new solution heat treated engine poppet valve has been developed which has a microstructure characterized by a large grain size in the head for optimum high temperature creep and fatigue properties and a finer grain size in the stem for good low temperature strength and fatigue properties.

REFERENCES:
patent: 1925116 (1933-09-01), Spence et al.
patent: 3615927 (1971-10-01), Paulson
patent: 3636605 (1972-01-01), Vitcha et al.

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