Patent ID: 6916387
Filing Date: 2005-07-12
Classification: B23K,B23P,F01D,F05D

Abstract:
1. A method of repairing a void on a nickel or cobalt superalloy investment casting, comprising: solution heat treating said casting, clamping said casting on a welding table, vibrating said table at a sub-harmonic frequency for a time before filling said void with a superalloy filler material, vibrating said table at a sub-harmonic frequency while filling said void by repeatedly making incremental weld deposits of said superalloy filler material in said void using pulsed gas tungsten arc welding and impinging each incremental deposit with a cooling gas after each incremental weld deposit is made and before the next incremental weld deposit is made, and vibrating said table at a sub-harmonic frequency for a time after said void is filled.