Method for manufacturing a piston

Details Method for manufacturing a piston Method for manufacturing a piston

1989-02-14

1990-04-24

Goldberg, Howard N.

Metal treatment

Compositions

Heat treating

295274, 29888048, B23P 1510

Patent

active

049188062

ABSTRACT:
In a method for manufacturing a piston a metal piston is prepared which has a skirt tapered towards the bottom end to such an extent that a diameter of the metal piston becomes uniform after a heat treating step. The metal piston is heat treated in a gas containing nitrogen and carbon to form a nitride film layer on the outer surface of the piston and to transform the skirt.

REFERENCES:
patent: 1061922 (1913-05-01), Patrick
patent: 2201405 (1940-05-01), McCarroll
patent: 3596571 (1971-08-01), Hill et al.
patent: 4364159 (1982-12-01), Holcomb
patent: 4496401 (1985-01-01), Dawes et al.
patent: 4531502 (1985-07-01), Mizuhara
patent: 4553472 (1985-11-01), Munro et al.
patent: 4596611 (1986-06-01), Dawes et al.
patent: 4656711 (1987-04-01), Yagi et al.

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