ALLOY ON BASE OF INTER-METALLIC COMPOUND NiAl AND ARTICLE MADE FROM THIS ALLOY Russian patent published in 2004 - IPC

FIELD: metallurgy; inter- metallic compounds on base of Ni₃Al; articles produced by precision casting. SUBSTANCE: proposed alloy is intended for castings of gas-turbine engines working at high thermal and power loads, mainly for working blades of aircraft and rocket gas turbines. Proposed alloy on base of Ni₃Al, contains aluminum, chromium, molybdenum, tungsten, titanium, carbon at additional inclusion of cobalt, rhenium, tantalum and lanthanum at the following relationship, mass-%: Al, 7.7-8.7; Cr, 5.0-6.0; W, 2.5- 3.5; Mo, 4.5-5.5; Ti, 0.3-0.8; C, 0.005-0.01; Co, 3.5-4.5; Re, 1.2-1.8; Ta, 0.1-1.0; La, 0.015-0.025; the remainder being Ni and article made from it. EFFECT: enhanced reliability; increased service life of articles. 2 cl, 2 tbl, 1 ex