Patent ID: 7632363

Claim:
A method for refurbishing a service-degraded component formed of a precipitation strengthening type of alloy for a gas turbine, comprising: performing a recovery heat treatment on the component in an environment having a predetermined pressure that avoids incipient melting of the alloy of the component, wherein the temperature of the component is increased to a predetermined temperature over a solvus temperature of the γ′ phases and the incipient melting temperature of the alloy of the component in the environment having the predetermined pressure, whereby the pressure is held to avoid incipient melting of the alloy of the component; performing a solution heat treatment, which is processed under reduced pressure or inert gas atmosphere, the solution heat treatment being performed after performing the recovery heat treatment; and performing an aging heat treatment, which is processed under reduced pressure or an inert gas atmosphere, the aging heat treatment being performed after performing the recovery heat treatment.