HEAT RESISTANT ALLOY MEMBER, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR REPAIRING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a heat resistant alloy member that maintains the creep strength and improves the fatigue characteristics.

SOLUTION: The heat resistant alloy member includes a recrystallized structure layer including finer grains on a surface of the member than those inside of the member. The recrystallized structure layer is formed by forming a stirred layer by giving processing strain to the surface of the member using a friction stir processing, and applying recrystallization heat treatment to the stirred layer for recrystallization.

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