Shot peening in combination with an heat treatment and a component

Abstract

A method to produce a metallic component is described. The method provides that an additional shot peening is performed on at least portion of component in order to obtain a fine grain structure during a following heat treatment in order to yield higher HCF because a finer grain structure is reached.

1 - 5 . (canceled) 
     
     
         6 . A method to produce a new metallic casted component, comprising:
 performing a first shot peening of the component before performing a heat treatment;   performing a heat treatment after the first shot peening; and   performing a second shot peening is after the heat treatment,   wherein the heat treatment is a bonding heat treatment and/or an aging heat treatment, and   wherein the component is partially coated with a metallic coating and/or ceramic coating before the first shot peening.   
     
     
         7 . The method according to  claim 6 ,
 wherein only a portion of the component is shot peened.   
     
     
         8 . The method according to  claim 7 ,
 wherein only a portion of the component outside the coated area is shot peened.   
     
     
         9 . The method according to  claim 6 ,
 wherein the component is a turbine blade and the shot peened area is the root of the blade.   
     
     
         10 . The method according to  claim 6 ,
 wherein a fine grained structure is yielded.   
     
     
         11 . The method according to  claim 10 ,
 wherein a fine grained structure only at the surface is yielded.   
     
     
         12 . The method according to  claim 6 ,
 wherein the heat treatment is the first heat treatment after coating the metallic component.