| 摘要 |
<p>A method for repairing gas turbine blades includes: athickness-reduced portion removing step S101 of working a surface of a blade tip 10a into a flat surface 13 by removing a thickness-reduced portion 12 of the blade tip 10a; a build-up welding step S102 of forming a built-up portion 14 with apredetermined thickness by melting powder of a build-up material higher in ductility than a base material forming the gas turbine blade 10 by a laser beam and building up the melted powder in multiple layers on the blade tip 10a whose surface is worked into the flat surface 13; a forming step S103 of working15 the built-up portion 14 into the same shape as a shape that the blade tip 10a originally has before suffering a thickness loss; and a heat-treatment step S104 of removing a residual strain caused by laser welding in the build-up welding step S102.Figure 3</p> |
