METHODS FOR PROCESSING TITANIUM ALLOYS Russian patent published in 2017 - IPC C22C14/00 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: method for grinding a billet grain size containing titanium alloy includes beta annealing of the billet, cooling to a temperature below the beta transition temperature of the titanium alloy, and comprehensive forging of the billet. Comprehensive forging involves forging on the press in the direction of the first orthogonal axis of the billet at a deformation rate sufficient for adiabatical heating of the billet inner area, forging the billet on the press in the direction of the second orthogonal axis of the billet with a deformation rate sufficient for adiabatical heating of the billet inner area, forging the billey on the press in the direction of the third orthogonal axis of the billet with a deformation rate sufficient for adiabatic heating of the billet inner area, and repeating at least one forging on the press to achieve total true deformation of at least 1.0. The temperature for forging the billet is in the temperature range from 100°F (55.6°C) below titanium alloy beta transition temperature to a temperature of 700°F (388.9°C) below titanium alloy beta transition temperature, and the deformation rate used during forging on the press is in the range of 0.2^s-1up to 0.8^s-1.

EFFECT: produce fine-grained alloy structure at higher deformation rates.

40 cl, 16 dwg, 1 tbl, 6 ex