HOT STRAIGHTENING BY STRETCHING OF HIGH-TENSILE TITANIUM ALLOY TREATED IN FIELD OF ALPHA/BETA PHASES Russian patent published in 2015 - IPC C22F1/18 B21D1/00 B21D3/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to methods of straightening of high-tensile titanium alloys. The method of straightening of the metal stock material, subjected to precipitation strengthening, selected from titanium based, nickel based, aluminium based or iron based alloys, includes heating to the temperature of straightening from 0.3 T_m up to temperature 25°F below the ageing temperatures of alloy, the stretching with the applying of pulling stress at least 20% of yield stress and neither equal nor more than the alloy yield stress. Meanwhile the stock material deviates from a straight line no more than by 0.125 inches (3.175 mm) per any 5 ft of length (152.4 cm) or per shorter length. Then the stock material is cooled with the simultaneous application of pulling stress.

EFFECT: after straightening the stock material conserves high durability characteristics.

21 cl, 9 dwg, 2 tbl, 6 ex