Making of steel component

Details Making of steel component Making of steel component

1986-02-04

1987-12-01

Dean, R.

Metal treatment

Compositions

Heat treating

148 165, 148318, 148319, C21D 174

Patent

active

047102381

ABSTRACT:
A component formed of interstitial free steel is heated in a gaseous atmosphere containing 15% by volume of a nitrogen doner, e.g. ammonia, at about 500.degree. C. to about 740.degree. C. for about 30 minutes to about 4 hours to form an epsilon iron nitride surface layer, and a layer of nitrides of trace alloying elements below the surface layer.

REFERENCES:
patent: 4496401 (1985-01-01), Dawes et al.
Harterei-Technische Mitteilungen, vol. 29, #1, 3/74, pp. 42-49.
Patents Abstracts of Japan, vol. 8, #56 (C-214), (1493), Mar. 14, 1984.
Chemical Abstracts, vol. 89, #24, Dec. 1978, p. 230, Abstract #20141d, Cols, Ohio, J. Bidlen, "Effect of Nitridation . . . ".
Chemical Abstracts, vol. 67, 1967, p. 8794, Abstract #93222v, Columbus, Ohio.

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