Method for welding superalloys components or repairing a crack in a superalloy component using brazing after welding

摘要

A method of welding superalloy components (10,12) comprises the following steps: (a) forming a weld prep groove (14) at an interface of the components; (b) welding the components using a filler material at ambient temperature; (c) covering the filler material and adjacent surfaces of the components (10,12) with a braze paste (18); and (d) heat treating the components (10,12), the heat treatment including a stress-relief cycle and a braze cycle. A similar process is used to repair a crack in a nickel-based superalloy component.