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

C - Chemistry, Metallurgy

23

C

117/81

C23C 8/34 (2006.01) C23C 8/24 (2006.01) C23C 28/00 (2006.01)

Patent

CA 1214364

ABSTRACT OF THE DISCLOSURE 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°C. The TiN layer thus formed in the surface- and subsurface-zone of the component has a Vickers hardness of 800 0.05 g/sq.mm. with a thickness of 20 microns. With this economical method, an increase in surface hardness from Vickers hardness 0.05 = 450 with prior art methods to Vickers hardness 0.05 = 800 is achieved.

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