Method of treating a nickel base alloy

Details Method of treating a nickel base alloy Method of treating a nickel base alloy

1983-02-23

1986-11-25

Dean, R.

Metal treatment

Compositions

Heat treating

148162, 148410, C22F 110

Patent

active

046247165

ABSTRACT:
A method of heat treating a nickel base superalloy comprising solution treatment at 2050.degree. to 2150.degree. F. (1121.degree. to 1177.degree. C.) for about 2 hours and cooling at a rate at least as rapid as still air; stabilization at 1750.degree. to 1850.degree. F. (954.degree. to 1010.degree. C.) for 1/4 to 4 hours and cooling at a rate at least as rapid as still air; and precipitation hardening at 1350.degree. F. (732.degree. C.) for at least about 8 hours and air cooling. The heat treated product contains a low level of precipitated grain boundary carbides, and exhibits an optimum balance of tensile strength, stress rupture life and creep strength, along with reduced residual stress in the product.

REFERENCES:
patent: 3061426 (1962-10-01), Bieber
patent: 3653987 (1972-04-01), Boesch
patent: 3667938 (1972-06-01), Boesch
patent: 4083734 (1978-04-01), Boesch
patent: 4093476 (1978-06-01), Boesch
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patent: 4253884 (1981-03-01), Maurer et al.
S. S. Manson, "Aerospace Structural Metals Handbook Chapter IN-100", revised 1978, pp. 1 & 6, Traverse City, MI.
Alloy Digest, "IN-100", Filing Code Ni-151, Mar. 1970, pp. 1 and 2, Upper Montclair, NJ.
Metals Handbook Ninth Edition, "Properties of Superalloys", 1980, vol. 3, pp. 242-243, Metals Park, OH.
W. F. Simmons, et al, "Guide to Selection of Superalloys", 1968, pp. 14-15, Metal Progress . . . Databook Metals Park, OH.

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