MANUFACTURE OF WIRE FROM (α+β)-TITANIUM ALLOYS WITH LENGTH OF AT LEAST 8500 M FOR ADDITIVE TECHNOLOGIES Russian patent published in 2021 - IPC C22F1/18 B21B3/00 B21C23/08 B82Y40/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the manufacture of titanium alloy wire for additive technology. Method for manufacturing wire from (α+β)-titanium alloys with a length of at least 8500 m for additive technologies includes heating a workpiece, deformation of the workpiece by drawing or rolling in several passes. Heating of the workpiece is carried out by the induction method on installations with a nominal power of 50-70 kW and a frequency of 40-80 kHz for a workpiece with a diameter of 8.0 to 4.0 mm and with a nominal power of 20-40 kW and a frequency of 300-500 kHz for a workpiece with a diameter of less than 4.0 to 1.6 mm, the deformation of the workpiece by drawing or rolling is carried out by heating the workpiece (Tw) to a temperature of Tw = 400-700°C and heating the dies or rollers (Td) to a temperature of Td = 400-700°C with control deformation temperature tolerance fields of ±10°C and with the degree of deformation of the workpiece μ=10-50% in one pass, determined by the formula μ=(d²_i-d²_(i+1))_/d²_i×100 where d_i and d_{(i + 1)} are wire diameters before and after deformation in the i-th pass, respectively, while the deformation rate (V) of the workpiece is selected at each pass depending on the diameter of the workpiece and the parameter (N) of acoustic emission: V = 10-20 m/min for diameter d = (from 8.0 to 5.9) mm and at (N) of not more than 0,04×10^-3 mV²/s, V = 20-40 m/min for diameter d = (from less than 5.9 up to 3.1) mm and at (N) of not more than 0,03×10^-3 mV²/s, V = 40-60 m/min for diameter d = (from less than 3.1 to 1.6) mm and at (N) of not more than 0,02×10^-3 mV²/s.

EFFECT: reduction of anisotropy of mechanical properties along the length of the wire as a single piece without welded joints, at least 8500 m long for additive technologies.

3 cl, 4 dwg, 5 tbl, 17 ex