METHOD OF PRODUCING BILLETS FROM ALLOYS BASED ON INTERMETALLIDES OF Nb-Al SYSTEM Russian patent published in 2017 - IPC C22C27/02 C22B34/24 C22C1/04 B22F3/14 

FIELD: metallurgy.

SUBSTANCE: method includes hydride-calcium synthesis of alloy powders and their consolidation by pressing and vacuum sintering. The charge consisting of Nb₂O₅ and Al₂O₃ oxides, is mixed with calcium hydride and thermally treated at a temperature of 1100-1300°C hours with the provision of hydride-calcium synthesis of alloy powders selected from the series of Nb₃Al, Nb₂Al and NbAl₃, after which the resulting alloy powders are treated with water and then with a solution of hydrochloric acid, the washed powder is dried and classified. Consolidation of the powder is carried out by pressing and sintering in a vacuum at a residual pressure not higher than 10^-4 mmHg; at a temperature of 0.77 to 0.87 of the alloy melting point for, at least, 2 hours, with the formation of a residual porosity of not more than 5%.

EFFECT: ensuring the production of billets with controlled phase and chemical composition.

2 cl, 4 ex, 4 tbl