Ronald E. Munson - Round Rock TX Shane Joseph Findlan - Harrisburg NC David W. Gandy - Concord NC Ramaswamy Viswanathan - Saratoga CA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
B23P 1500
US Classification:
298891
Abstract:
A method for repairing a shrink-fitted turbine disc without removing the disc from the shaft. The method is composed of two basic steps: (1) depositing one or more weld layers in a vicinity of a defective region of the disc using a temperbead welding process and (2) heat treating the disc using an induction heating process. In a first embodiment of the method, the heat treating step includes heating a heat-affected zone of the disc in a vicinity of the one or more weld layers to a temperature T. sub. h, heating a rim region of the disc to a temperature T. sub. r and heating a bore region of the disc to a temperature T. sub. b, where T. sub. h, T. sub. r >T. sub. b. In a second embodiment of the method, the heat treating step includes heating a region of the disc in a vicinity of the one or more weld layers using the induction heating process and concurrently cooling a bore region of the disc. In a third embodiment of the method, the heat treating step includes heating at least a portion of the disc using the induction heating process and concurrently heating the shaft to maintain a predetermined temperature differential between the bore region of the disc and the shaft. In a fourth embodiment of the method, the heat treating step includes heating at least a portion of the disc using the induction heating process and concurrently heating the shaft to maintain a uniform temperature between the bore region of the disc and the shaft.
Dr. Munson graduated from the University of Texas Medical School at San Antonio in 1979. He works in Corpus Christi, TX and specializes in Family Medicine.
Isbn (Books And Publications)
Raising The Dead: Organ Transplants, Ethics, And Society