Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1992-12-23
1994-04-12
Dean, R.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148410, 148674, 148555, C22F 110
Patent
active
053022173
ABSTRACT:
Superalloy castings having large variations in section thickness are heat treated using a cyclic stress relief procedure, with the temperature being cycled between about 50.degree. F. (28.degree. C.) and 150.degree. F. (83.degree. C.) below the second phase particle solvus temperature, to relieve the residual stresses incurred during cooling within the mold following casting, followed by a solution cycle at a temperature about 25.degree. F. (14.degree. C.) below the second phase particle solvus temperature to dissolve some or all of the second phase particles.
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patent: 5074925 (1991-12-01), Gostic et al.
Biondo Charles M.
Fuesting Timothy P.
Gostic William J.
Dean R.
Phipps Margery S.
Sohl Charles E.
United Technologies Corporation
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