Explosion-welded gas turbine shroud and a process of forming an explosion-welded gas turbine

Abstract

An explosion-welded turbine shroud and a process of forming an explosion-welded gas turbine shroud are disclosed. The explosion-welded gas turbine shroud includes a first alloy explosion welded to a second alloy. In the explosion-welded gas turbine shroud, the first alloy forms at least a portion of a hot gas path or an expansion region of the gas turbine shroud includes the first alloy. The process includes explosion welding a first alloy to a second alloy to form the gas turbine shroud.

1 . A gas turbine shroud, comprising:
 a first alloy explosion welded to a second alloy;   wherein the first alloy forms at least a portion of a hot gas path of the gas turbine shroud.   
     
     
         2 . The gas turbine shroud of  claim 1 , wherein the first alloy is an austenitic alloy. 
     
     
         3 . The gas turbine shroud of  claim 2 , wherein the second alloy is an austenitic alloy. 
     
     
         4 . The gas turbine shroud of  claim 2 , wherein the second alloy is a ferritic alloy. 
     
     
         5 . The gas turbine shroud of  claim 1 , wherein the first alloy is resistant to heat above a first temperature and the second alloy is resistant to heat above a second temperature. 
     
     
         6 . The gas turbine shroud of  claim 5 , wherein the first temperature is greater than the second temperature. 
     
     
         7 . The gas turbine shroud of  claim 5 , wherein the first temperature is above about 3000° F. 
     
     
         8 . The gas turbine shroud of  claim 5 , wherein the second temperature is between about 800° F. and 1250° F. 
     
     
         9 . The gas turbine shroud of  claim 1 , further comprising an expansion region positioned along the hot gas path. 
     
     
         10 . The gas turbine shroud of  claim 9 , wherein the expansion region includes the first alloy and the second alloy. 
     
     
         11 . The gas turbine shroud of  claim 9 , wherein the expansion region consists of the first alloy. 
     
     
         12 . The gas turbine shroud of  claim 1 , wherein the first alloy decreases in thickness along the hot gas path. 
     
     
         13 . A gas turbine shroud, comprising:
 an expansion region; and   a first alloy explosion welded to a second alloy;   wherein the expansion region of the gas turbine shroud includes the first alloy.   
     
     
         14 . The gas turbine shroud of  claim 13 , wherein the expansion region further includes the second alloy. 
     
     
         15 . The gas turbine shroud of  claim 13 , wherein the expansion region consists of the first alloy. 
     
     
         16 . The gas turbine shroud of  claim 13 , wherein the expansion region is positioned along a hot gas path and the first alloy decreases in thickness along the hot gas path. 
     
     
         17 . A process of forming an explosion-welded gas turbine shroud, comprising:
 explosion welding a first alloy to a second alloy;   wherein the first alloy forms at least a portion of a hot gas path of the gas turbine shroud.   
     
     
         18 . The process of  claim 17 , wherein the explosion welding of the first alloy to the second alloy forms a preform. 
     
     
         19 . The process of  claim 18 , further comprising removing material from the preform. 
     
     
         20 . The process of  claim 17 , wherein the explosion welding includes multiple concurrent detonations.