Method and apparatus for repairing superalloy components

Abstract

A method of repairing a metallic component, such as a superalloy turbine blade or turbine nozzle, includes the step of preparing the component by stripping the protective coatings from the component. The component is then pre-conditioned for welding by a first hot isostatic process. Once the conditioning sequence is complete, the component is welded using any of a number of welding techniques and by adding weld fillers to the weld area. After the welding step, the component is sealed by a second hot isostatic process treatment performed at conditions similar to the first hot isostatic process. The component is finally prepared for re-entry into service.

1 - 14 . (canceled)  
     
     
         15 . A metallic component repaired according to a method comprising: 
 subjecting a metallic component to a first hot isostatic processing operation;    welding said metallic component; and    exposing said metallic component to a second hot isostatic processing operation.    
     
     
         16 . The metallic component of  claim 15 , wherein said method further comprises delivering a weld filler to said metallic component.  
     
     
         17 . The metallic component of  claim 15 , wherein said method further comprises sealing micro-cracking prior to said exposing.  
     
     
         18 . The metallic component of  claim 15 , wherein said welding comprises laser welding.  
     
     
         19 . The metallic component of  claim 15 , wherein said welding comprises gas tungsten arc welding.  
     
     
         20 . The metallic component of  claim 15 , wherein said welding comprises plasma transferred arc welding.  
     
     
         21 . The metallic component of  claim 15 , wherein said welding comprises electron beam welding.