METHOD FOR MANUFACTURING GAS TURBINE ENGINE BLADES FROM DEFORMED BLANKS OF AN ALLOY BASED ON ORTHORHOMBIC TITANIUM ALUMINIDE Russian patent published in 2023 - IPC C22F1/18 B21K3/04 

FIELD: metallurgy.

SUBSTANCE: method of deformation-heat treatment of blanks of blades of gas turbine engines from an alloy based on orthorhombic titanium aluminide includes stamping of blanks of blades at a temperature below the Ttt. 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°C, 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°C with an exposure of at least 0.5 hours is carried out, and at the second - aging at a temperature below T_tt by 200-300°C with an exposure of 1 to 36 hours, where T_tt is the transformation temperatureβ↔α₂.

EFFECT: provided high mechanical properties of the alloy based on orthorhombic titanium aluminide σ_0.2²⁰=1000-1300 MPa; σ_В²⁰=1150-1400 MPa; δ²⁰=3-8 %; ψ²⁰=3-5%; σ_0.2⁶⁵⁰=1030 MPa; σ_В⁶⁵⁰=1120 MPa; δ⁶⁵⁰=6 %; ψ⁶⁵⁰=4%.

1 cl, 2 dwg, 7 ex