METHOD FOR PRODUCING DEFORMED SEMI-FINISHED PRODUCTS FROM HIGH-STRENGTH PSEUDO-β-TITANIUM ALLOYS Russian patent published in 2023 - IPC C22F1/18 

FIELD: metallurgy.

SUBSTANCE: thermomechanical processing of structural high-strength pseudo-β-titanium alloys, and can be used for load-bearing structures in shipbuilding, aviation and space technology, power plants. A method for manufacturing deformed semi-finished products from high-strength pseudo-β-titanium alloys includes production of an ingot and its thermomechanical processing by ten heatings, deformations, and coolings. First, heating is carried out to a temperature from (Tpt+250)°C to (Tpt+350)°C followed by three stages of deformation with a degree of deformation of 30-60% with alternating upset and drawing. Then heating is carried out to a temperature (Tpt-30)°C followed by two stages of deformation with a degree of deformation of 10-25% at each stage. Next, recrystallization treatment is carried out with heating to a temperature (Tpt+120)°C and subsequent deformation with a degree of deformation of 15-35% with cooling to room temperature, then heating to a temperature (Tpt-30)°C followed by two stages of deformation with a degree of deformation of 10-25% in each stage. Further, additional recrystallization treatment is carried out with heating to a temperature (Tpt+100)°C followed by deformation with a degree of deformation of 15-35% with cooling to the ambient temperature. Next, heating is carried out to a temperature (Tpt-30)°C followed by three stages of deformation with a degree of deformation of 10-25% at each stage, then heating is carried out to a temperature (Tpt-30)°C followed by four stages of deformation with a degree of deformation of 15-30% with alternating upset and drawing. Next, heating is carried out to a temperature (TpT-30)°C followed by four stages of deformation with a degree of deformation of 10-25% at each stage, then heating is carried out to a temperature (Tpt-30)°C followed by three stages of deformation with a degree of deformation of 10-25% at each stage, then heating is carried out to a temperature (Tpt-30)°C followed by three stages of deformation with a degree of deformation of 10-25% at each stage, where Tpt is the polymorphic transformation temperature.

EFFECT: semi-finished products with a thickness of 180 mm and above are characterized by high mechanical properties.

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