Welding repair of steam and gas turbine rotors made of Cr-Mo-V steel

摘要

An analysis is made of typical steam and gas turbinerotor failures. Based on the different causes of rotor failure andthe ways in which they occur, an evaluation of the weldability ofCr-Mo-V steels and the classification of common turbine rotorrepair possibilities are presented. The development of a specific insitu welding repair process for a damaged 20.65 MW gas turbinerotor is described. After repair, the rotor was returned to service.