Method of roughening and coating the contact surface of a valve

Details Method of roughening and coating the contact surface of a valve Method of roughening and coating the contact surface of a valve

1993-07-27

1995-10-03

Beck, Shrive

Coating processes

Spray coating utilizing flame or plasma heat

427456, 427328, 451 38, 451 39, B24C 100, B05D 108

Patent

active

054550785

ABSTRACT:
After primary blasting is applied to the outer circumferential surface of a cylindrical valve lifter the upper end of which is closed with an abrasive to form a rough surface, a secondary blasting is applied to the rough surface with an abrasive which has particle size smaller than that of the first abrasive. Smaller irregularities are formed on the rough surface, and a coated layer is formed by thermal spraying on the surface, thereby increasing adhesive strength of the coated layer by anchoring effect.

REFERENCES:
patent: 3188776 (1965-06-01), Dill
Thermal Spraying: Practice, Theory, and Application, American Welding Society, 1985, pp. 18-23.

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