REPAIR METHOD OF GAS TURBINE HIGH TEMPERATURE PART AND GAS TURBINE HIGH TEMPERATURE PART

摘要

PPROBLEM TO BE SOLVED: To provide a repair part of excellent strength and environment resistance by efficiently and surely uniforming a crystal growing direction of a building-up part, appropriately penetrating in and preventing recrystallization due to crack and residual stress on welding, when conducting building-up repair of the gas turbine high temperature part by a half overlap method. PSOLUTION: In the repair method of the gas turbine high temperature part for repairing a part to be repaired of the gas turbine high temperature part using a directional solidification member by build up welding of single crystal with the half overlap method, output density of a heating source of build up welding is 1 10SP4/SPto 10 10SP4/SPW/cmSP2/SPand thickness of a unit layer of build up welding is equal to or thinner than 300 m and one or more layers are formed. PCOPYRIGHT: (C)2008,JPO&INPIT