Process for ion nitriding aluminum material

Details Process for ion nitriding aluminum material Process for ion nitriding aluminum material

1989-06-13

1990-03-20

Dean, R.

Metal treatment

Compositions

Heat treating

204177, C22F 102

Patent

active

049098624

ABSTRACT:
A process for ion nitriding aluminum material which comprises the steps of placing an object of aluminum or aluminum alloy for treatment in a closed vessel; evacuating residual oxygen gas from said closed vessel; charging said closed vessel with a heating gas and inducing discharges in said closed vessel, thereby heating the surface of the object for treatment to a prescribed nitriding temperature; charging said closed vessel with a surface-roughening gas composed of a rare gas and 5-2000 ppm of a gas containing at least one element of oxygen, nitrogen, and carbon, and roughening the surface of the object for treatment by means of glow discharges or ion beams in the atmosphere of said surface roughening gas; and charging said closed vessel with a nitriding gas and simultaneously inducing glow discharges in said closed vessel, thereby forming a nitride layer on the surface of the object for treatment.

REFERENCES:
patent: 4597808 (1986-07-01), Tachikawa et al.

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