EXECUTION WORK METHOD OF HEAT INSULATING COVERING OF GAS TURBINE BLADE HAVING COOLING HOLE

摘要

PROBLEM TO BE SOLVED: To provide a method for executing a TBC on a surface of a gas turbine blade having a cooling hole. SOLUTION: Packing having a means removable later is filled in the cooling hole of the gas turbine blade having the cooling hole, a backing metallic layer is formed on the surface of the packing-applied gas turbine blade by thermal spraying, a heat insulating covering is formed on a surface of this backing metallic layer by thermally spraying a ceramic material mainly composed of zirconia, and blocking-up of the cooling hole is prevented by lastly removing the packing.