Producton method of hot-rolled sheets and plates of titanium alloys with intermittent rolling process

A new method is proposed for the production of hot-rolled sheets and plates from titanium alloys involving interruption of the rolling process. The method makes it possible to improve the mechanical properties of rolled iron sheets. To improve the microstructure of sheets consisting of α-and (2α + 2β)-alloys the hot and warm rolling processes are combined with into one by cooling the stock followed by deformation according to conditions of the warm rolling process. A method is proposed involving two heating cycles followed by cooling to room temperature and then by heating the strip to the temperature corresponding to (α+β)-phase and rolling the metal to the required dimensions with the degree of shingling being not less 40%. A comparative metallographic analysis has shown that the microstructure of sheets of different thickness is characterized by the absence of streaks of well defined boundaries of β-grains and by the presence of uniformly dispersed mixture of (α+ β)-phase. The relative elongation has grown from 2 -10% to 6 - 12% with some increase in the strength of the metal. The developed method is recommended for the production of plates and thick sheets from various titanium alloys