Titanium nitride dispersion strengthened alloys

Details Titanium nitride dispersion strengthened alloys Titanium nitride dispersion strengthened alloys

1985-03-25

1986-04-15

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

751221, 75245, 148 13, 148 37, 148421, 156DIG75, 156DIG99, 419 23, 419 28, 419 31, 419 34, 419 35, 419 45, 419 54, 419 57, 419 58, 419 63, 419 64, 419 67, 420421, B22F 324

Patent

active

045826790

ABSTRACT:
To increase the creep strength of a titanium-containing alloy which also contains chromium, the alloy powder is heated in the presence of ammonia at a temperature of the order of 700.degree. C. so as to form a layer of chromium nitride(s) on the particles and is then heated further in an inert atmosphere at a temperature between 1000.degree. C. and 1150.degree. C. to dissociate the chromium nitride(s) thereby effecting nitriding of the titanium to titanium nitride which affords dispersion-strengthening of the alloy.

REFERENCES:
patent: 4047981 (1977-09-01), Arnold et al.
patent: 4427461 (1984-01-01), Kindlimann
patent: 4464207 (1984-08-01), Kindlimann

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