Superalloy powder

Abstract

The invention discloses a Ni— or Co-based superalloy powder enriched with at least one fusing element: B, such that each grain of powder includes said at least one fusing element distributed among the other elements of the superalloy. A powder of this kind already has the requisite final composition, both in terms of constituent elements of the superalloy and in terms of fusing element(s). In particular, the proportion of B and, optionally, Si is adapted for use of the powder without a preliminary step of mixing with another powder. Use of this powder to fabricate components, in particular plates, by sintering, or mixed with a cement, or as a constituent of a mixture for injection molding of metallic powders.

1 . Superalloy powder, characterized in that the superalloy is enriched with at least one fusing element: B, such that each grain of powder includes said at least one fusing element distributed among the other elements of the superalloy and in that the superalloy is composed of, in weight percent: 
 14 to 24% of Co;    8.2 to 20% of Cr;    0 to 4.7% of Mo;    2.25 to 8% of Al;    0 to 3.1% of Ti    0 to 3.3% of Si;    0 to 4.5% of Ta;    0 to 0.6% of Y;    up to 1.3% of B; and    a remainder of Ni.    
   
   
       2 . Superalloy powder according to  claim 1 , wherein said superalloy enriched with fusing element is composed of, in weight percent: 
 14 to 19.6% of Co;    8.2 to 15.3%ofCr;    2.6 to 4.7% of Mo;    2.25 to 3.5% of Al;    1.95 to 3.1% of Ti    0 to 2% of Si;    0.4 to 1.3% of B ; and    a remainder of Ni.    
   
   
       3 . Superalloy powder according to  claim 2 , wherein said superalloy enriched with fusing element is composed of, in weight percent: 
 16.4 to 19.6% of Co;    8.2 to 12.8% ofCr;    2.6 to 4.4% of Mo;    2.25 to 3.3% of Al;    1.95 to 2.9% of Ti    0.8 to 2% of Si;    0.5 to 1.3% of B; et    a remainder of Ni.    
   
   
       4 . Superalloy powder according to  claim 2 , wherein said superalloy enriched with fusing element is composed of, in weight percent: 
 14 to 16% of Co;    12 to 15.3% of Cr;    3.35 to 4.7% of Mo;    2.9 to 3.5% of Al    2.5 to 3.1% of Ti    0.4 to 1% of B; and    a remainder of Ni.    
   
   
       5 . Superalloy powder, characterized in that the superalloy is enriched with at least one fusing element: B, such that each grain of powder includes said at least one fusing element distributed among the other elements of the superalloy and in that the superalloy is composed of, in weight percent: 
 17.2 to 23% of Cr;    26.75 to 32.4% of Ni;    0 to 2.5% of Si;    0 to 0.5% of C;    0 to 0.4% of Zr;    0 to 3% of Ta ;    0 to 0.5% of Y;    0 to 8% d'Al;    up to 1.2% of B; and    a remainder of Co.    
   
   
       6 . Superalloy powder according to  claim 5 , wherein said superalloy enriched with fusing element is composed of, in weight percent: 
 17.2 to 22.2% of Cr;    26.75 to 30% of Ni;    0 to 1.5% of Si;    0.8 to 1% of B;    0.1 to O.5% of C;    0 to 0.37% of Zr;    0 to 3% of Ta; and    a remainder Co.    
   
   
       7 . Superalloy powder according to any one of  claims 1  to  6 , obtained by atomization of a liquid mixture including the elements of said superalloy and said at least one fusing element.  
   
   
       8 . Use of a superalloy powder according to any one of  claims 1  to  7  for the fabrication of components, in particular plates, by sintering.  
   
   
       9 . Use of a superalloy powder according to any one of  claims 1  to  7  mixed with a cement.  
   
   
       10 . Use of a superalloy powder according to any one of  claims 1  to  7  as a constituent of a mixture for injection molding of metallic powders.