METHODS FOR PROCESSING TITANIUM ALLOYS Russian patent published in 2019 - IPC C22F1/18 B21J5/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to methods of processing titanium alloys. Proposed method comprises the steps of billet beta-annealing, billet cooling to temperature below beta-transition temperature of titanium alloy and comprehensive forging of billet. Inclusive forging includes forging of workpiece on press in direction of first axis of workpiece with rate of deformation sufficient for adiabatic heating of inner area of workpiece, forging the workpiece on press in the direction of the second axis of the workpiece at a rate of deformation sufficient for adiabatic heating of the inner area of the workpiece, forging the workpiece on press in the direction of the third axis of the workpiece with a rate of deformation sufficient for adiabatic heating of the inner area of the workpiece. First axis, the second axis and the third axis are not the same or parallel. At least one of workpiece forging is repeated on press to achieve total true deformation of work piece by at least 1.0. Billet forging temperature is in range from 100 °F (55.6 °C) below temperature of beta-transition of titanium alloy to temperature of 700 °F (388.9 °C) below temperature of beta-transition of titanium alloy. Deformation rate used during forging on press is in range from 0.2 to 0.8 s^-1. Fine-grain equiaxial structure is obtained in billets.

EFFECT: special forging equipment is not required.

29 cl, 16 dwg, 1 tbl, 6 ex