METHOD FOR HEAT TREATING A SERVICED TURBINE PART

摘要

A method for heat treating a serviced turbine part (10) to improve a hold ti me fatigue cracking resistance of the serviced turbine part is provided. The method includes positioning the serviced turbine part in a vacuum furnace configured to limi t surface oxidation. The serviced turbine part is controllably heated to prevent distortion. A surface damage layer is recrystallized into a fine grain structure to preven t fatigue crack initiation. The serviced turbine part is controllably cooled to preven t distortion.