Nickel alloy

Abstract

The invention relates to a nickel alloy derived from René 125, but with reduced levels of certain elements (Zr, B, P, S, Si and, to a lesser extent, Ti and Hf) in order to limit the appearance of cracks upon solidification in a moulding process. Specifically, 4.80%≦Al≦5.00%, 1.48%≦Hf≦1.52%, 2.28%≦Ti≦2.33%, 0.005%≦B≦0.01%, 1.77%≦Mo≦1.97%, and Zr≦0.007%. Other elements can have levels that match those of René 125.

1 . A nickel alloy, comprising:
 nickel,   9.50% to 9.90% by weight of cobalt,   8.70% to 9.00% by weight of chromium,   6.65% to 7.05% by weight of tungsten,   3.67% to 3.87% by weight of tantalum,   0.10% to 0.12% by weight of carbon,   1.77% to 1.97% by weight of molybdenum,   4.80% to 5.00% by weight of aluminium,   1.48% to 1.52% by weight of hafnium,   2.28% to 2.33% by weight of titanium,   0.005% to 0.01% by weight of boron, and   less than 0.007% by weight of zirconium.   
     
     
         2 . The nickel alloy according to  claim 1 , further comprising:
 less than 0.001% by weight of phosphorous, and   less than 0.001% by weight of sulphur.   
     
     
         3 . The nickel alloy according to  claim 1 , comprising: more than 59.83% by weight of nickel. 
     
     
         4 . The nickel alloy according to  claim 1 , wherein a total weight of titanium, hafnium and aluminium is less than 8.77%. 
     
     
         5 . The nickel alloy according to  claim 1 , wherein the nickel alloy is suitable for manufacturing a bladed distributor part of an aeronautics engine stator. 
     
     
         6 . The nickel alloy according to  claim 5 , wherein the nickel alloy is treated with a T3R heat treatment.