Aluminum piston with steel reinforced piston ring grooves

Details Aluminum piston with steel reinforced piston ring grooves Aluminum piston with steel reinforced piston ring grooves

1975-09-02

1978-02-21

Cohen, Irwin C.

Expansible chamber devices

Piston

Open-ended hollow skirt type

2771895, F16J 100, F16J 922

Patent

active

040746160

ABSTRACT:
An aluminum piston for use in heavy duty internal combustion engines is disclosed, in which the grooves for receiving the piston rings are formed in stainless steel inserts fusion bonded directly to the aluminum without an intermediate metallic layer other than the resulting alloy of the steel and aluminum. The method of making such piston is described in which austenitic stainless steel powder deposited in an oversize groove in the aluminum piston is melted in situ by a laser beam to simultaneously form the stainless steel insert and alloy it with the aluminum to provide a fusion bond, the piston ring groove being subsequently formed in the stainless steel insert.

REFERENCES:
patent: 2550879 (1951-05-01), Stevens, Jr.
patent: 3041116 (1962-06-01), Rosen et al.
patent: 3183796 (1965-05-01), Christen et al.
patent: 3190273 (1965-06-01), Bachle et al.
patent: 3354793 (1967-11-01), Meier et al.
patent: 3533329 (1970-10-01), Galli
patent: 3596571 (1971-08-01), Hill et al.

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