NICKEL-BASE CAST HIGH-TEMPERATURE ALLOY Russian patent published in 1998 - IPC

FIELD: metallurgy, particular, nickel-base alloys applicable in facing of parts operating under severe conditions at high-temperature fretting corrosion and sulfide corrosion, for instance, facing of contact surfaces of working nozzle vanes of stationary gas turbines of gas-turbine plants. SUBSTANCE: the offered alloy contains, wt.%: carbon 0.06-0.12; chromium 15.0-16.7; cobalt 10.0-11.5; molybdenum 2.55-3.20; tungsten 4.5-6.0; aluminium 2.4-3.2; titanium 4.2-5.0; yttrium 0.05; boron 0.02; zirconium 0.05; niobium 4.2-5.0; sulfur 0.008; phosphorus 0.008; manganese 0.30; silicon 0.30; iron 0.5; copper 0.07; nitrogen 0.01; bismuth 0.00005; lead 0.001; antimony 0.0005; arsenic 0.0005; the balance, nickel. EFFECT: increased initial hardness of alloy with preservation of resistance to sulfide corrosion of alloy in operation under conditions of high temperatures. 3 tbl