Treating nickel base alloys

Details Treating nickel base alloys Treating nickel base alloys

1979-08-29

1981-03-03

Dean, R.

Metal treatment

Compositions

Heat treating

148 315, 148162, C22F 110

Patent

active

042538840

ABSTRACT:
A method of heat treating and coating a nickel base alloy containing chromium, titanium, aluminum, cobalt, molybdenum, tungsten, boron and carbon. The alloy is heated at a temperature of at least 2050.degree. F. to put most of the coarse gamma prime particles into solution; treated within the temperature range of between 1800.degree. and 2000.degree. F. to initiate the formation of and form randomly dispersed gamma prime particles; treated within the temperature range of between 1500.degree. and 1800.degree. F. to precipitate fine gamma prime particles, to coarsen existing gamma prime particles and to precipitate discrete carbide particles; coated; treated at a temperature of at least 1600.degree. F. to lessen the sharp differential in chemistry between it and the coating at the interface thereof; and treated at a temperature within the range of between 1300.degree. and 1500.degree. F. to precipitate fine gamma prime particles, and discrete carbide particles at grain boundaries.

REFERENCES:
patent: 3653987 (1972-04-01), Boesch
patent: 4083734 (1978-04-01), Boesch
patent: 4093476 (1978-06-01), Boesch

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