METHOD FOR HEAT TREATMENT OF INTERMETALLIC TITANIUM ORTHO-ALLOYS Russian patent published in 2023 - IPC C22F1/18 

FIELD: metallurgy.

SUBSTANCE: intermetallic titanium alloys based on the Ti₂AlNb compound, which can be used for the manufacture of gas turbine engine parts operating at elevated temperatures. Method for vacuum heat treatment of billets made of intermetallic titanium ortho-alloys includes loading billets into a charge, heating the charge with billets to the heat treatment temperature, holding and cooling. Heating of the charge with billets is carried out stepwise in a vacuum with a vacuum value of not more than 0.0093 Pa: first, heating is carried out to a temperature of 500°C at a speed of 10 to 12°C⋅ min ^-1 with an exposure of at least 3 hours, then heating is carried out to temperatures from 900 to 940°C at a speed of 5 to 8°C⋅ min^-1 with an exposure of at least 3 hours, after which the charge with billets is cooled in an oven in a vacuum of 0.0093 Pa to a temperature of 250°C and further in air up to a temperature of 20°C.

EFFECT: efficient removal of hydrogen, improvement of the mechanical properties of the billets.

3 cl, 2 tbl