REFRACTORY NICKEL-BASED ALLOY FOR MOLDED PIECES WITH DIRECTED AND MONOCRYSTALLINE STRUCTURE Russian patent published in 1998 - IPC

FIELD: refractory materials. SUBSTANCE: invention is mainly designed for manufacturing blades of high- temperature turbines employed in aircraft, transport (automobile and ship motors), and power (power units of main pipelines, mobile power stations) areas. Invention aims at increasing resistance against hot sulfide corrosion under cyclic heat-cooling conditions and also resistance to high-cycle fatigue from circular bend arising in stream of the gaseous products of fuel burning upon contact with alkali metal salts. The proper alloy is composed, wt.-%: aluminum, 7.8-9.0; titanium, 0.6-1.2; tungsten, 1.8-2.5; molybdenum, 4.5-5.5; chromium, 4.5-5.5; carbon, 0.007-0.02; lanthanum, 0.0015- 0.015; cobalt, 3.5-4.6; and nickel, the balance. EFFECT: improved alloy characteristics. 6 tbl