Ion-nitriting process

Metal treatment – Compositions – Heat treating

Patent

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204177, C21D 148

Patent

active

042126878

ABSTRACT:
An ion-nitriding process in which workpieces are subjected to a two-step glow discharge in a nitrogen and hydrogen atmosphere, there being a larger nitrogen to hydrogen ratio in the second step.

REFERENCES:
patent: 3389070 (1968-06-01), Berghaus et al.
patent: 3761370 (1973-09-01), Keller
Metals Handbook, 8th Ed., vol. 2, American Society for Metals, p. 162.

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