Method of rejuvenating cobalt-base superalloy articles

Details Method of rejuvenating cobalt-base superalloy articles Method of rejuvenating cobalt-base superalloy articles

1996-01-30

1998-04-21

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148512, 148522, 148527, C22C 1907

Patent

active

057413789

ABSTRACT:
An improved method is described for restoring the mechanical properties to carbide-containing Co-based superalloy gas turbine components which have been exposed to high temperatures and pressures for extended periods of time. The method includes solution heat treating to 2250.degree.-2300.degree. F. for one to twelve hours to dissolve complex carbides, and aging at approximately 1965.degree.-1975.degree. F. for two to twenty four hours. The rejuvenated components exhibit excellent high temperature creep properties.

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