MORE CREEP RESISTANT TURBINE ROTOR, AND PROCEDURES FOR REPAIR WELDING OF LOW ALLOY FERROUS TURBINE COMPONENTS

摘要

- 19 - 53,834 A more creep resistant turbine rotor and novel methods for repairing worn surfaces of Cr-Mo-V steam turbine components are disclosed. These methods include specified alloy compositions and welding procedures that minimize weld stresses and cracking. These alloys exhibit improved creep and fatigue properties and are preferably deposited using a gas tungsten arc welding procedure. Bead sequencing, cooling side plates and the use of run-off tabs are also disclosed for minimizing welding defects in turbine rotors and discs.