Patent ID: 8720056

Claim:
A turbine rotor blade repair method for repairing damage of a fin at a tip of a turbine rotor blade, characterized by comprising: overlaying a damaged portion of the fin with metal by welding where the heat from welding producing tensile residual stresses in a boundary region between the fin and the overlaying metal; peening the boundary region between the fin and the overlaying metal to produce compressive residual stresses in the boundary region so as to reduce the tensile residual stresses produced in the boundary region produced during the welding; and thereafter performing solution treatment to repair the damage of the fin of the turbine rotor blade by heating the turbine rotor blade to a temperature higher than the liquefaction temperature of the boundary region between the fin and the overlaying metal and lower than the melting point of the overlaying metal so as to maintain the magnitude of the tensile residual stresses in the boundary region at the same magnitude as the magnitude of the tensile residual stresses resulting from the peening, wherein the peening is performed on both side portions of the boundary region between the fin and the overlaying metal.