Metal treatment – Compositions – Heat treating
Patent
1975-02-21
1976-05-18
Dean, R.
Metal treatment
Compositions
Heat treating
148 127R, C21D 602, C22F 104, C22F 110, C22F 118
Patent
active
039575420
ABSTRACT:
A method for extending the secondary creep life of an alloy part which had previously been subjected to a solution heat treatment at a high temperature and to a subsequent precipitation hardening heat treatment at a lower temperature, the method being characterized by subjecting the part, after it has experienced significant secondary creep but before tertiary creep has set in, to a recuperative heat treatment at a temperature substantially below the solution heat treatment temperature, and preferably above the precipitation hardening heat treatment temperature, while the part is unstressed.
REFERENCES:
patent: 3817796 (1974-06-01), Kramer
Cina Baruch
Dror Gidon
Meron Michael
Myron Stuart Maurice
Barish Benjamin J.
Dean R.
Israel Aircraft Industries Ltd.
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