METHOD OF THERMOMECHANICAL PROCESSING OF TITANIUM ALLOYS Russian patent published in 2009 - IPC C22F1/18 

FIELD: metallurgy.

SUBSTANCE: thermomechanical processing is implemented in eleven stages, herewith at the first stage it is implemented heating up to temperature (T_pt+230÷T_pt+270)°C, deformation at a rate 50-90%, at the second stage - heating up to temperature (T_pt-20÷T_pt-40)°C, deformation at a rate 30-60%, at third stage - (T_pt+60÷T_pt+160)°C, 40-70%, at fourth stage - (T_pt-20÷T_pt-40)°C, 30-60%, at fifth stage - (T_pt+60÷T_pt+150)°C, 40-60%, at sixth stage - (T_pt-10÷T_pt-40)°C, 40-70%, at seventh stage - (T_pt-40÷T_pt+200)°C, 65-95%, at eighth stage - (T_pt-100÷T_pt-160)°C, 40-70%, at ninth stage - (T_pt-100÷T_pt-160)°C, 20-50%; an tenth stage - (T_pt-100÷T_pt-160)°C, 15-40%, at eleventh stage - (T_pt-150÷T_pt 190)°C, 2-5%, where T_pt temperature of polymorphic transformation. Additionally from three up to seven deformations implemented at stages from third up to tenth, is implemented with changing of the deformation direction for 90°.

EFFECT: increasing of elongation ratio and flanging ratio, reduction of operation bending radius.

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