Patent ID: 6494677
Filing Date: 2002-12-17
Classification: B23P,F01D,F05D,Y02T,Y10T

Abstract:
A method of repairing a turbine nozzle segment having at least two vanes disposed between radially outer and inner bands, said outer and inner bands each defining a cold side and a hot side, said method comprising:separating said outer and inner bands from said vanes; forming a slot through said outer band for each vane; forming a slot through said inner band for each vane; inserting an outer end of a newly manufactured replacement vane into each one of said outer band slots; inserting an inner end of each newly manufactured replacement vane into one of said inner band slots; welding each replacement vane to said outer band on said cold side; welding each replacement vane to said inner band on said cold side; brazing each replacement vane to said outer band on said hot side; and brazing each replacement vane to said inner band on said hot side.