Titanium and titanium alloy bar hot continuous rolling production line and production process

Abstract

The invention relates to a titanium and titanium alloy bar hot continuous rolling production line and a production process. The titanium and titanium alloy bar hot continuous rolling production line consists of a heating furnace, a transverse two-roll rough rolling unit, a high-rigidity short-stress-line longitudinal two-roll intermediate rolling unit, a high-rigidity short-stress-line longitudinal two-roll finish rolling unit and a small bar cooling bed. A low-speed continuous rolling process is adopted to reduce deformation heat produced by deformation resistance during rolling, guarantee the internal structure and the properties of rolled pieces and directly produce qualified bars. The titanium and titanium alloy bar hot continuous rolling production line can be used for rolling titanium and titanium alloy bars with specifications from phi 12mm to phi 140mm, the production of high-precision and heavy-piece-weight titanium and titanium alloy bars is realized, the production efficiency is high and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of titanium and titanium alloy processing, and in particular relates to a hot continuous rolling production line and production technology of titanium and titanium alloy rods. Background technique [0002] Due to their unique atomic structure and crystal structure, titanium and titanium alloys are hard-to-deform and difficult-to-machine metals. The existing technology generally adopts segmented multi-fire heating and rolling of titanium and titanium alloy rods, but it is difficult to achieve large unit weight. (Generally, the unit weight of the bar is only 5-50Kg), and the dimensional accuracy is poor, and the production efficiency is low. Due to the extremely poor thermal conductivity of titanium and titanium alloys, the deformation heat generated by the large deformation resistance during rolling is not easy to spread out. Especially when rolling high-strength and high-temperature titanium alloys, overheat...

AI Technical Summary

Problems solved by technology

[0002] Due to their unique atomic structure and crystal structure, titanium and titanium alloys are hard-to-deform and difficult-to-machine metals. The existing technology generally adopts segmented multi-fire heating and rolling of titanium and titanium alloy bars, but it is not easy to achieve large unit weight. (General bar weight is only 5-50Kg), and the dimensional accuracy is poor, and the production efficiency is low

Due to the extremely poor thermal conductivity of titanium and titanium alloys, the deformation heat generated by the large deformation resistance during rolling is not easy to spread out. Especially when rolling high-strength and high-temperature titanium alloys, overheating structures are easily formed inside the metal, resulting in the formation of structures in the rolled piece. Overheating and uneven phenomena cannot guarantee the internal structure and performance of the rolled piece, and it is difficult to obtain qualified bars

Images