| 摘要 |
FIELD: metallurgy.SUBSTANCE: invention relates to cast heat-resistant alloys based on intermetallic compound NiAl, meant for making by directed crystallization and mono-crystal casting hot section parts of gas turbine engines of aviation industry. Alloy based on intermetallic compound NiAl contains, wt%: aluminium 8.2-8.7; chromium 2.5-6.0; molybdenum 2.8-4.2; tungsten 2.8-4.5; titanium 0.01-1.2; tantalum 0.5-5.5; rhenium 0.01-1.4; cobalt 0.01-5.5; carbon 0.015-0.08; lanthanum 0.015-0.4; hafnium 0.01-0.6; zirconium 0.01-0.08; yttrium 0.015-0.15; erbium, neodymium and praseodymium in total content of 0.1-0.3; nickel - the rest.EFFECT: higher reliability, longer life due to increased heat resistance, short-term strength () and yield strength () at room temperature for KGO [001] of an alloy.2 cl, 2 tbl, 8 ex |
