METHOD FOR PRODUCING SHEETS OF β-TITANIUM ALLOYS Russian patent published in 2008 - IPC C22F1/18 B21B3/00 

FIELD: non-ferrous metallurgy, namely thermal-mechanical working of titanium alloys, possibly manufacture of sheets of high-strength β-titanium alloys by rolling process.

SUBSTANCE: method for producing sheets comprises steps of hot pressing of ingot to slab; processing slab; subjecting it to hot and cold rolling and to heat treatment. Hot pressing of ingot to slab is realized at temperature exceeding by 400-440°C temperature value Tpc of polymorphous conversion. Hot rolling is realized by three stages. At first stage rolling is performed at temperature exceeding by 400 - 430°C temperature Tpc at total deformation degree 71 - 95%. At second stage rolling is performed at temperature exceeding by 60 - 80°C temperature value Tpc at total deformation degree 20 - 30% with single reduction values 3 - 5%. At third stage rolling is performed at temperature exceeding by 160-180°C temperature value Tpc with total deformation degree 51 - 90% and single reduction values 5 - 7%. Then annealing is realized at temperature exceeding by 80 - 180 °C temperature value Tpc and cooling in temperature range 750 - 350°C with deformation rate 100-300°C/min is performed. Cold rolling is performed at total deformation degree 8 - 20%.

EFFECT: increased stabilized strength and ductile properties of materials.