Methods for surface treating engine valves and engine valves...

Details Methods for surface treating engine valves and engine valves... Methods for surface treating engine valves and engine valves...

2007-06-05

2007-06-05

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Valve

Reciprocating valve

C029S888400

Reexamination Certificate

active

11333797

ABSTRACT:
The present invention teaches a method for surface treating an engine valve made from titanium or titanium alloy in order to form a hardened coating having a high level of adhesion to the surface of the engine valve, and also having improved abrasion and impact resistances. The method includes a hardening treatment process for forming a hardened layer on the surface of the engine valve by providing oxygen dissolved into the surface of the engine valve as a solid solution; and a coating treatment process applied after the hardening treatment process. The coating treatment process forms a coating on the surface of the engine valve by physical vapor deposition.

REFERENCES:
patent: 01-096407 (1989-04-01), None
patent: 10-238320 (1998-09-01), None

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