Ion-nitriding process

Details Ion-nitriding process Ion-nitriding process

1979-07-12

1982-01-05

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 203, 204164, C21D 148

Patent

active

043092276

ABSTRACT:
Disclosed is an improved ion-nitriding process comprising ion-nitriding a workpiece at a high voltage level of glow discharge in a gas atmosphere resulting from the introduction of a gas mixture containing a specific amount of ammonia into a nitriding reactor, and then, further ion-nitriding the same workpiece at a lower voltage level of glow discharge in a gas atmosphere resulting from the introduction of a gas mixture not containing ammonia into the reactor.

REFERENCES:
patent: 3190772 (1965-06-01), Berghaus et al.
patent: 3228809 (1966-01-01), Berghaus et al.
patent: 3616383 (1971-10-01), Klauesler
patent: 3730863 (1973-05-01), Keller

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