Cobalt-based super alloy

Abstract

A cobalt-based superalloy includes the following: 32-45 wt.-% Co, 28-40 wt.-% Ni, 10-15 wt.-% Cr, 2.5-5.5 wt.-% Al, 6.5-16 wt.-% W, 0-9 wt.-% Ta, 0-8 wt.-% Ti, 0.1-1 wt.-% Si, 0-0.5 wt.-% B, 0-0.5 wt.-% C, 0-2 wt.-% Hf, 0-0.1 wt.-% Zr, 0-8 wt.-% Fe, 0-6 wt.-% Nb, 0-7 wt.-% Mo, 0-4 wt.-% Ge and a remainder of unavoidable impurities.

1 - 5  (canceled) 
     
     
         6 . A cobalt-based superalloy, comprising:
 32-45% by weight of Co;   28-40% by weight of Ni;   10-15% by weight of Cr;   2.5-5.5% by weight of Al;   6.5-16% by weight of W;   0-9% by weight of Ta;   0-8% by weight of Ti;   0.1-1% by weight of Si;   0-0.5% by weight of B;   0-0.5% by weight of C;   0-2% by weight of Hf;   0-0.1% by weight of Zr;   0-8% by weight of Fe;   0-6% by weight of Nb;   0-7% by weight of Mo;   0-4% by weight of Ge; and   a remainder of unavoidable impurities.   
     
     
         7 . The cobalt-based superalloy according to  claim 6 , which comprises:
 from 0 to <2% by weight of Hf;   from 0 to <0.1% by weight of Zr;   from 0 to <8% by weight of Fe;   from 0 to <6% by weight of Nb;   from 0 to <7% by weight of Mo;   from 0 to <4% by weight of Ge.   
     
     
         8 . The cobalt-based superalloy according to  claim 6 , comprising an intermetallic γ′ phase (Co,Ni) 3 (Al, W, Ti, Ta). 
     
     
         9 . A cobalt-based superalloy, comprising:
 32-45% by weight of Co;   28-40% by weight of Ni;   10-15% by weight of Cr;   2.5-5.5% by weight of Al;   6.5-16% by weight of W;   0.2-9% by weight of Ta;   0.2-8% by weight of Ti;   0.1-1% by weight of Si;   an amount of <0.5% by weight of B;   an amount of <0.5% by weight of C;   0-2% by weight of Hf;   0-0.1% by weight of Zr;   0-8% by weight of Fe;   0-6% by weight of Nb;   0-7% by weight of Mo;   0-4% by weight of Ge; and   a remainder of unavoidable impurities.   
     
     
         10 . The cobalt-based superalloy according to  claim 9 , comprising an intermetallic γ′ phase (Co,Ni) 3 (Al, W, Ti, Ta). 
     
     
         11 . A cobalt-based superalloy, comprising:
 32-45% by weight of Co;   28-40% by weight of Ni;   10-15% by weight of Cr;   2.5-5.5% by weight of Al;   6.5-16% by weight of W;   0.2-9% by weight of Ta;   0.2-8% by weight of Ti;   0.1-1% by weight of Si;   an amount of <0.5% by weight of B;   an amount <0.5% by weight of C;   from 0 to <2% by weight of Hf;   from 0 to <0.1% by weight of Zr;   from 0 to <8% by weight of Fe;   from 0 to <6% by weight of Nb; from 0 to <7% by weight of Mo;   from 0 to <4% by weight of Ge; and   a remainder of unavoidable impurities.   
     
     
         12 . The cobalt-based superalloy according to  claim 11 , comprising an intermetallic γ′ phase (Co,Ni) 3 (Al, W, Ti, Ta).