Process for carbonitriding steel and cast iron articles

Details Process for carbonitriding steel and cast iron articles Process for carbonitriding steel and cast iron articles

1976-11-17

1979-08-07

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 166, C21D 148

Patent

active

041636805

ABSTRACT:
The proposed process for carbonitriding steel and cast iron articles comprises the saturation of these articles with carbon and nitrogen at a temperature of 550.degree. to 650.degree. C. in a carbonitriding medium of vaporous ammonium carbamate.
The invention finds extensive application to aircraft manufacturing, automotive industry, machine-tool manufacture and precision mechanics for surface hardening of steel and cast iron articles.

REFERENCES:
patent: 3232797 (1966-01-01), Bessen
patent: 3310367 (1967-03-01), Mavrovic
patent: 3492100 (1970-01-01), Roubin et al.
patent: 3748195 (1973-07-01), Kondo et al.
patent: 3929878 (1975-12-01), Mavrovic
patent: 3940440 (1976-02-01), Mavrovic
patent: 4003764 (1977-01-01), Wunning
"CRC Handbook of Chemistry and Physics", 58th Ed., CRC Press, Inc., Cleveland, Ohio, 1977, p. C536.
Heat Treatment of Metals, 1975-2, pp. 39-49.
The Condensed Chemical Dictionary, Van Nostrand Reinhold Co., N.Y., Hawley, 1974, p. 51.

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