NICKEL-BASE CASTING ALLOY Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: alloy has, wt.-%: chrome 12-20; tungsten 4-8; niobium 4.5-7.0; molybdenum 0.5-5.0; aluminium 0.01-2.1; iron 0.1-5.0; zirconium 0.005-0.3; carbon 0.01-0.2; cerium 0.001-0.2; boron 0.01-0.2; silicon 0.01-0.6; manganese 0.01-1.0; barium 0.001-0.2; calcium 0.001-0.02, and nickel - the rest. After thermal treatment in endogaseous medium value of internal oxidation range is 0.008-0.085 mm, range thickness of carbonization layer is 0.006-0.024 mm; increase of carbon content in the surface layer is 0.015-0.118%; impact elasticity at 700 C is 1,3-2,4 mJ/m²; crack-resistance (ingot quantities with cracks of 1000 tested samples) is 7-20 articles. EFFECT: decreased oxidizing and carbonization of ingot surface. 2 tbl