METHOD FOR MAKING PRODUCTS FROM GRANULES MADE FROM NICKEL-BASED ALLOYS OR FROM TITANIUM-BASED ALLOYS Russian patent published in 2023 - IPC C22C1/04 B22F3/15 B22F1/52 B22F3/24 B22F9/10 C22F1/10 C22F1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to making products based on granules of nickel and titanium alloys and can be used in additive technologies for building products from powder materials. The method for making products from granules made from nickel-based alloys or titanium-based alloys includes the production of initial spray blanks, centrifugal dispersion, into granules formed by heating, of the end face of a rotating initial blank with an electric arc plasma torch, with cooling of the solidifying granules with a plasma-forming gas, separation of granules from foreign inclusions, thermal degassing and filling of granules into capsules with evacuation and sealing of filled capsules, obtaining a compact by hot isostatic pressing of filled capsules and thermal treatment of the compact with heating 3 degrees above the solvus temperature of the hardening phase, but below the solidus temperature, followed by cooling and single-stage/ multi-stage aging. Initial spray blanks are produced by hot isostatic pressing of raw materials, including commodity waste granules, or multiple residues of spray blanks, or cinders of spray blanks, or a mixture of these wastes from one alloy grade in a degassed, evacuated and sealed capsule assembly, followed by hot isostatic pressing by mechanical processing of the pressed capsule assembly and obtaining a dense compact billet of spraying of a homogeneous composition, the spraying of which is carried out in the range of the operating arc current of 1300-1600 A, with the limitation of the power of the plasma torch, which does not cause overheating of the cooling gas to a temperature above 250°C, whereas melting is carried out by uniform melting of the end face of the rotating initial blank, excluding the formation of an unstable peripheral spontaneously decaying annular edge on it, and heat treatment of the compact is provided under conditions of its all-round compression.

EFFECT: increase in yields of suitable products by fractions, composition and no inclusions from erosion products, increase in the level of mechanical characteristics of finished products, including indicators of heat resistance, low-cycle fatigue and other resource characteristics.

1 cl, 2 tbl, 3 ex