ALLOY ON BASE OF INTERMETALLIC COMPOUND AND ARTICLE MADE FROM THIS ALLOY Russian patent published in 2003 - IPC

FIELD: metallurgy; cast heat- resistant alloys on base of intermetallic compound Ni₃Al and articles produced by precision casting such as turbine blades for gas-turbine engines. SUBSTANCE: main requirement for articles made from proposed alloy is low density ((≤8000 kg/cu.m), high limits of long-term strength in temperature range of 900-1200 C and resistance to oxidation to 1200-1300 C. Alloy on base of intermetallic compound Ni₃Al includes the following components, mas.%: al, 7.8-9.0; Cr, 5.0-6.5; Mo, 3.0-4.0; W, 2.7-4.0; Ti, 0.8-1.2; C, 0.001-0.005; Sn, 0.03-0.05; and Ni, the balance. Invention describes also article made from such alloy. The following characteristics of alloy are improved: high-temperature strength within temperature range of 900-11000 C, heat resistance at temperature of 1200 C and increased yield of finished articles with monocrystalline structure. EFFECT: enhanced efficiency. 3 cl, 2 tbl, 3 ex