Method of forming a hard surface layer on a metal component

Details Method of forming a hard surface layer on a metal component Method of forming a hard surface layer on a metal component

1983-09-02

1985-04-16

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 166, 148131, B22F 324

Patent

active

045114110

ABSTRACT:
A component of titanium or alloys thereof is placed in an autoclave. Nitrogen gas or ammonia is pumped into the autoclave. The chemically untreated component is exposed in the autoclave for three hours to a pressure of 900 bar and a temperature of 1000.degree. C. The TiN layer thus formed in the surface- and subsurface-zone of the component has a Vickers hardness of 800 .sub.0.05 g/sq.mm. with a thickness of 20 microns. With this economical method, an increase in surface hardness from Vickers hardness .sub.0.05 =450 with prior art methods to Vickers hardness .sub.0.05 =800 is achieved.

REFERENCES:
patent: 1793309 (1931-02-01), Egan
Horn, G. & Saur, E., "Praparation und Supraleitungseigenschaften von Niobnitrid sowie Niobnitrid mit Titan-, Zirkon-, und Tantalzusatz", in Zeitschrift fur Physik, vol. 210, No. 1, (1968), pp. 70-79.

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