Method of producing piston ring

Details Method of producing piston ring Method of producing piston ring

1992-11-20

1995-07-18

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29557, 2988807, B23P 1500

Patent

active

054330017

ABSTRACT:
A method of producing a piston ring to be incorporated in an internal combustion engine includes first nitriding surfaces of a steel base material in a high temperature range and then continuously nitriding in a low temperature range. Finally a porous layer of at least a sliding surface is removed to expose a diffusion layer under the porous layer.

REFERENCES:
patent: 1788697 (1931-01-01), Williams et al.
patent: 2390417 (1945-12-01), Bramberry
patent: 3870572 (1975-03-01), Brugger et al.
patent: 4519853 (1985-05-01), Kostelitz et al.
patent: 4531985 (1985-07-01), Tommis

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