ALLOY ON BASIS OF NiAl INTERMETALLIC COMPOUND AND ITEM MADE FROM IT Russian patent published in 2014 - IPC C22C19/05 

FIELD: metallurgy.

SUBSTANCE: invention relates to casting alloys based on Ni₃Al intermetallic compound and items obtained by a method of accurate casting as per molten models with a dendrite column structure, such as for example nozzle blades, assemblies of nozzle blades and other parts of gas-turbine engines of aircraft and automobile industries. Alloy based on Ni₃Al intermetallic compound has the following chemical composition, wt %: Al 8.4-9.0, Cr 4.5-5.5, W 3.0-3.8, Mo 3.0-3.8, Ti 0.3-0.8, Co 6.5-7.5, C 0.02-0.08, La 0.0015-0.015, Hf 0.3-0.8, and Ni is the rest. Alloy based on Ni₃Al intermetallic compound is characterised by increased heat resistance at temperatures of 1000 and 1050°C on bases of tests of 100, 500 and 1000 hours.

EFFECT: use of the proposed alloy on the basis of Ni₃Al intermetallic compound will allow improving reliability of items and increasing their operating life.

2 cl, 2 tbl, 3 ex