HEAT-RESISTANT DISPERSE STRENGTHENED ALLOY BASED ON NIOBIUM, AND METHODS FOR ITS OBTAINING Russian patent published in 2012 - IPC C22C27/02 B22F3/11 

FIELD: metallurgy.

SUBSTANCE: invention can be used for manufacture of parts of aerospace equipment, which operate at temperatures of up to 1600°C. Heat-resistant disperse strengthened alloy based on niobium and methods for its obtaining are described. Alloy contains niobium matrix inside which there located are disperse escapes of Al₂O₃ with diameter of up to 10 mcm at the following component ratio, wt %: Al - 0.1-20, O₂ - 0.05-10, Fe, Cr, Cu, Ni, Ti, Cr, Mn - not more than 2.5 in total, Nb - the rest. Method for obtaining heat-resistant alloy based on niobium as per it. 1, which involves crushing of powder mixture, contains the following, wt %: Al - 0.1-20, Fe, Cr, Cu, Ni, Ti, Cr, Mn not more than 2.5 in total and niobium is the rest; first, in dry condition during 14-16 hours, and then in presence of acetone during 4-6 hours at ratio of weight of powders to weight of grinding balls of 1 : (8.5-11.5) till supersaturated solid solution Nb(Al) is formed; after that, the obtained mixture is compacted and sintered at temperature of 1650-1750°C during 20-60 minutes. Besides, sintering can be carried out in vacuum of 0.13-0.01 Pa or at pressure of 13.33-1.33 Pa in CO environment.

EFFECT: increasing ductility from room temperature to high temperatures and manufacturability of the material.

6 cl, 6 dwg, 6 ex