PROPERTY RECOVERING METHOD FOR NICKEL SUPERALLOY

摘要

A method is disclosed for recovering the properties of single crystal and directionally solidified Nickel based superalloys and articles made thereof, after use in a high temperature environment. The method comprises the steps of a stress relief treatment, a gamma' rejuvenation heat treatment at a temperature below the gamma'-solvus temperature (Tsolvus, gamma) of the superalloy, a precipitation heat treatment and an aging heat treatment.