HEAT-RESISTANT CAST ALLOY ON BASIS OF NICKEL Russian patent published in 2012 - IPC C22C19/05 

FIELD: metallurgy.

SUBSTANCE: invention refers to heat-resistant cast alloys on the basis of nickel, which is used for manufacture of high-loaded parts, and namely blades of gas turbines with directed column and monocrystalline structure, which operate at temperatures above 1000°C and higher. Heat-resistant alloy contains the following components, wt %: chrome 5.0-8.0, cobalt 9.0-12.0, tungsten 14.0-16.0, aluminium 4.0-6.0, tantalum 6.0-10.0, carbon 0.002-0.1, yttrium 0.001-0.1, lanthanum 0.001-0.1, cerium 0.001-0.1, silicon 0.01-0.3, magnesium 0.01-0.15, manganese 0.01-0.3, nickel is the rest. Total content of tungsten and tantalum is within the range, wt %, 21.9≤(W+Ta)≤23.5, and total content of chrome and cobalt is within the range, wt %, 17.2≤(Cr+Co)≤18.8.

EFFECT: increasing high-temperature strength of alloy at simultaneous sufficient reduction of its cost and deficiency.

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