High-temperature nickel-based alloys

Abstract

The present disclosure relates to novel nickel-base alloy compositions including 7.25-7.75 wt % Cr, 0.6-1.0 wt % Mo, 8.5-9.1 wt % W, 6.0-6.4 wt % Al, 0.6-1.0 wt % Ti, 0.06-0.10 wt % C, 0.01-0.02 wt % B, 0.4-0.6 wt % Hf, and at least one of: 8.6-9.6 wt % Co and 4.0-4.8 wt % Ta; or 8.6-9.4 wt % Co, 3.8-4.4 wt % Ta, and 0.4-0.6 wt % Re, with the balance being nickel and trace impurities. Gas turbine blades or guide vanes are also provided, where the blades or vanes are formed using an alloy having such compositions.

What is claimed is: 
     
         1 . A nickel-based alloy comprising:
 7.25-7.75 wt % Cr;   0.6-1.0 wt % Mo;   8.5-9.1 wt % W;   6.0-6.4 wt % Al;   0.6-1.0 wt % Ti;   0.06-0.10 wt % C;   0.01-0.02 wt % B;   0.4-0.6 wt % Hf; and   one of:   8.6-9.6 wt % Co and 4.0-4.8 wt % Ta; or   8.6-9.4 wt % Co, 3.8-4.4 wt % Ta, and 0.4-0.6 wt % Re,   with the balance consisting of Ni and trace impurities.   
     
     
         2 . The alloy of  claim 1 , comprising:
 8.6-9.6 wt % Co and 4.0-4.8 wt % Ta.   
     
     
         3 . The alloy of  claim 1 , comprising:
 8.6-9.4 wt % Co, 3.8-4.4 wt % Ta, and 0.4-0.6 wt % Re.   
     
     
         4 . The nickel-based alloy of  claim 1 , having a composition of:
 7.5 wt % Cr;   0.8 wt % Mo;   8.8 wt % W;   6.2 wt % Al;   0.8 wt % Ti;   0.08 wt % C;   0.015 wt % B;   0.5 wt % Hf; and   one of:   9.1 wt % Co and 4.4 wt % Ta; or   9.0 wt % Co, 4.1 wt % Ta, and 0.5 wt % Re,   with the balance consisting of Ni and trace impurities.   
     
     
         5 . The alloy of  claim 4 , comprising:
 9.1 wt % Co and 4.4 wt % Ta.   
     
     
         6 . The alloy of  claim 4 , comprising:
 9.0 wt % Co, 4.1 wt % Ta, and 0.5 wt % Re.   
     
     
         7 . The alloy of  claim 4 , wherein an amount of Al+Ta+Ti is between 10.6 and 12.2 wt %. 
     
     
         8 . A gas turbine component comprising a nickel-based alloy comprising:
 7.25-7.75 wt % Cr;   0.6-1.0 wt % Mo;   8.5-9.1 wt % W;   6.0-6.4 wt % Al;   0.6-1.0 wt % Ti;   0.06-0.10 wt % C;   0.01-0.02 wt % B;   0.4-0.6 wt % Hf; and   one of:   8.6-9.6 wt % Co and 4.0-4.8 wt % Ta; or   8.6-9.4 wt % Co, 3.8-4.4 wt % Ta, and 0.4-0.6 wt % Re,   with the balance consisting of Ni and trace impurities,   
       wherein the gas turbine component comprises at least one of a blade, a vane, or a ring segment. 
     
     
         9 . The gas turbine component of  claim 8 , wherein the nickel-based alloy comprises 8.6-9.6 wt % Co and 4.0-4.8 wt % Ta. 
     
     
         10 . The gas turbine component of  claim 8 , wherein the nickel-based alloy comprises 8.6-9.4 wt % Co, 3.8-4.4 wt % Ta, and 0.4-0.6 wt % Re. 
     
     
         11 . The gas turbine component of  claim 8 , wherein the nickel-based alloy has a composition of:
 7.5 wt % Cr;   0.8 wt % Mo;   8.8 wt % W;   6.2 wt % Al;   0.8 wt % Ti;   0.08 wt % C;   0.015 wt % B;   0.5 wt % Hf; and   one of:   9.1 wt % Co and 4.4 wt % Ta; or   9.0 wt % Co, 4.1 wt % Ta, and 0.5 wt % Re,   with the balance consisting of Ni and trace impurities.   
     
     
         12 . The gas turbine component of  claim 11 , wherein the nickel-based alloy comprises 9.1 wt % Co and 4.4 wt % Ta. 
     
     
         13 . The gas turbine component of  claim 10 , wherein the nickel-based alloy comprises 9.0 wt % Co, 4.1 wt % Ta, and 0.5 wt % Re.