HEAT-RESISTANT ALLOY BASED ON NICKEL FOR CASTING OF BLADES OF GAS-TURBINE UNITS

摘要

FIELD: metallurgy.SUBSTANCE: proposed refractory nickel based alloy comprises the following components in wt %: carbon 0.02-0.13; chrome 15.6-16.2; cobalt 8.2-8.8; tungsten 2.4-2.8; molybdenum 1.5-2.0; aluminium 3.3-3.7; titanium 3.3-3.7; niobium 0.6-1.1; boron 0.005-0.015; tantalum 1.5-2.0, hafnium 0.00-0.2; zirconium 0.03-0.08; calcium 0.00-0.02; manganese ?0.02; copper 0.00-0.05; sulphur ?0.005; phosphorus ?0.005; nitrogen 10-20 ppm; oxygen 10-15 ppm, at least two elements chosen from the following group: silicon ?0.25; magnesium 0.00-0.02; iron ?0.2; nickel - rest.EFFECT: alloy is characterised by high characteristics of long-term strength in combination with high oxidation ands corrosion resistance, improved structural homogeneity.2 tbl