METHOD FOR MANUFACTURING GAS TURBINE ENGINE BLADES FROM INTERMETALLIC ALLOY BASED ON ORTHORHOMBIC TITANIUM ALUMINIDE Russian patent published in 2023 - IPC C22F1/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to the pressure treatment of intermetallic alloys based on orthorhombic titanium aluminide. The method of manufacturing blanks of blades of gas turbine engines from intermetallic alloys based on orthorhombic titanium aluminide includes stamping of blanks of blades at a temperature below the transformation temperature (Ttt). Before stamping, the blade blanks are preheated to a temperature higher than the Ttt temperature by no more than 100°C, exposed for at least 0.5 hours, subjected to all-round forging at a temperature below Ttt by 50-150°C while carrying out at least 3 passes with a change in the axis of deformation by 90° and a degree of deformation of at least 40% per pass, the last pass being carried out with a degree of deformation of at least 50%. The forging of blade blanks is carried out with a degree of deformation of at least 50% at a temperature below T_tt by 50-200°С, after which heat treatment is carried out, including two stages, at the first of which quenching in air at a temperature below T_tt by 50-150°С with an exposure of at least 0.5 hours is carried out, and at the second of aging at a temperature below T_tt 200-300°С with an exposure of 1 to 36 hours, where T_tt is the transformation temperature ↔α₂.

EFFECT: obtaining high mechanical properties of blade blanks.

1 cl, 2 dwg, 6 ex