FIELD: machine building.
SUBSTANCE: invention relates to machine building and can be used in production of turbine discs used in aerospace devices. Turbine disc integrated with disc shaft is produced from bar stock. Disc includes a portion of the disc through which a portion of the shaft passes, and comprises the following components, wt.%: C: from 0.02 to 0.04, Cr: from 18.5 to 20.0, Co: from 13.0 to 14.0, Mo: from 4.0 to 4.90, Al: from 1.3 to 1.6, Ti: from 2.80 to 3.25, Ti/Al: from 2.25 to 2.38, (Al + Ti): from 4.35 to 4.58, O: 20 ppm and less, N: 20 ppm and less, S: 10 ppm and less, P: 80 ppm and less, and nickel: residue.
EFFECT: obtained discs satisfy complex requirements for resistance to high temperatures and low-cycle fatigue strength.
5 cl, 5 dwg, 6 tbl, 5 ex
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