Patent ID: 6145194
Filing Date: 2000-11-14
Classification: B23P,C21D,F01D,Y10T

Abstract:
A method of repairing a shrink-fitted turbine disc without removing said shrink-fitted turbine disc from a shaft, said method comprising the steps of:depositing one or more weld layers in a vicinity of a defective region of said shrink-fitted turbine disc using a temperbead welding process; andheat treating said shrink-fitted turbine disc using an induction heating process to heat a heat-affected zone of said shrink-fitted turbine disc in a vicinity of said one or more weld layers to a temperature T.sub.h, to heat a rim region of said shrink-fitted turbine disc to a temperature T.sub.r and to heat a bore region of said shrink-fitted turbine disc to a temperature T.sub.b, where T.sub.h, T.sub.r >T.sub.b.