METHOD OF OBTAINING OF BIMETALLIC DISK OF GAS TURBINE ENGINE Russian patent published in 2015 - IPC B22F7/02 B22F3/24 

FIELD: metallurgy.

SUBSTANCE: method of obtaining of bimetallic disk of gas turbine engine comprises the filling of capsule of the disk consisting of the rim and hub parts, granules of two heat resisting nickel alloys, hot isostatic pressing of the capsule and subsequent heat treatment. The disk capsule is filled with the granules of two heat resisting nickel alloys differing by solvolysis temperature no more than by 5-10°C. For filling of the rim disk part the granules of one heat resisting nickel alloy with a fraction 140 mcm and more are used. For the hub part the granules of another heat resisting nickel alloy with a fraction no more than 70 mcm are used, meanwhile the hot isostatic pressing and heat treatment are performed at the same temperature exceeding the solvolysis temperature of each alloy.

EFFECT: improvement of efficiency, resource and reliability and decrease of weight of gas turbine engine due to higher characteristics of durability and resistance of low-cycle fatigue in hubs of disks of turbines and improved characteristics of hot-resistance and crack resistance of their rims.

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