Varied heating rate solution heat treatment for superalloy casti

Details Varied heating rate solution heat treatment for superalloy casti Varied heating rate solution heat treatment for superalloy casti

1986-04-09

1988-01-05

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148404, 148410, C22F 110

Patent

active

047174323

ABSTRACT:
Methods for heat treating cast, nickel base superalloy articles are described. According to the invention, the articles are heated to progressively higher temperatures greater than the gamma prime solvus temperature and less than the incipient melting temperature. The incipient melting temperature is increased due to homogenization of segregate phases, while at the same time, the gamma prime goes into solution. The rate at which the temperature is increased closely approximates the rate at which the incipient melting temperature increases due to homogenization.

REFERENCES:
patent: 2798827 (1957-07-01), Hanink
patent: 3310440 (1967-03-01), Piearcey
patent: 3494709 (1970-02-01), Piearcey
patent: 3753790 (1973-08-01), Walker et al.
patent: 3783032 (1974-01-01), Walker et al.
patent: 4116723 (1978-09-01), Gell et al.
patent: 4209348 (1980-06-01), Duhl et al.

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