METHOD TO PRODUCE PRODUCTS FROM COMPLEX-ALLOYED POWDER HEAT-RESISTANT NICKEL ALLOYS Russian patent published in 2014 - IPC B22F3/24 C22C1/04 

FIELD: metallurgy.

SUBSTANCE: granules with size less than 100 mcm are produced by the method of plasma melting and centrifugal spraying of a rotary cast stock with speed of rotation more than 15000 rpm. Granules are degassed in a moving flow with mass feed of 10-50 kg/hr with simultaneous filling, vibration compaction and sealing of capsules. Hot isostatic pressing and tempering is carried out for 2-8 hours in a single-phase area by 2-30°C higher than the solvus temperature, speed of cooling during tempering is maintained as higher than 25°C/min. Ageing is carried out into two stages: for heat-resistant alloys - at 850-890°C and 740-780°C, and for high-strength alloys - at 800-760°C and 680-720°C.

EFFECT: increased resource and reliability of products operating under conditions of hard loading of a GTE, due to higher characteristics of strength, heat-resistance and crack resistance under working temperatures.

1 tbl