METHOD FOR PRODUCING HIGHLY THIN SHEET OF TITANIUM ALLOY Ti-6,5Al-2,5Sn-4Zr-1Nb-0,7Mo-0,15Si Russian patent published in 2016 - IPC C22F1/18 C22C14/00 

FIELD: metal processing.

SUBSTANCE: invention relates to metal compression forming, namely to manufacture of very thin sheets from high-strength pseudo-alpha titanium alloy Ti-6.5Al-2.5Sn-4Zr-1Nb-0.7Mo-0.15Si. Method for production of very thin sheets from titanium alloy Ti-6.5Al-2.5Sn-4Zr-1Nb-0.7Mo-0.15Si includes preliminary processing of ingot by forging or stamping of ingot in β-area to produce slab, slab hot rolling to semi-finished rolled piece is carried out in 4 stages: first stage, at temperature (RRT+120÷RRT+150) °C with total deformation degree of 50-70 %, second stage, at temperature (RRT-30÷RRT-60) °C with total deformation degree 40-65 %, third stage, at temperature (RRT+80÷RRT+120) °C with total deformation degree 40-60 %, and fourth stage, at temperature (RRT-30÷RRT-70) °C with total deformation degree 40-80 %. Then cutting is performed of semifinished rolled product into sheet workpieces, their assembly into package, packet rolling into sheet blank at temperature (RRT-60÷RRT-100) °C, with total deformation of pack of 60-80 %, and then cold rolling, with intermediate and final annealings, and finishing processing at all stages.

EFFECT: higher manufacturability and quality of produced super thin sheets.

1 cl, 1 dwg, 1 tbl