High-tubular thin-walled pure titanium ring stable rolling process

Abstract

The invention discloses a high-tubular thin-walled pure titanium ring stable rolling process. The process steps are as follows: free forging performing, roughing and ring rolling. The above-mentionedhigh-tubular thin-walled pure titanium ring stable rolling process adopts free forging performing. On the one hand, the potential defects such as shrinkage cavities, shrinkage, and pores ect. in the titanium billet are eliminated, so that the titanium billet has higher mechanical properties. On the other hand, the preforming of the titanium billet makes the rolling amount of the ring rolling smaller, thereby providing conditions for one heat complete ring rolling process in a rolling temperature range of the pure titanium material while improving the rolling stability, so that the grain size of the ring can be increased; the roughing before the ring rolling can remove the surface defects to reduce the incidence of roll creeping, skull patch and ellipse when rolling the ring; in the ring rolling, a support of the ring by a carrier roller can greatly reduce the friction force, thereby improving the stability of the ring during rolling, in addition, the setting of each parameter in the ring rolling can improve the stability of the rolling, thereby reducing the incidence of roll creeping, skull patch and ellipse.

Description

technical field [0001] The invention relates to the field of ring forging, in particular to a stable rolling process for high cylindrical thin-walled pure titanium rings. Background technique [0002] Generally, rings with a wall thickness less than 60mm and a cylinder height greater than 700mm are called high-cylindrical thin-walled rings. When rolling high-cylindrical thin-walled rings, due to the thin wall, the billet will be unstable, so that the billet is easy to roll, turn over, oval. The thermal conductivity and fluidity of pure titanium materials are very poor, and the rolling temperature range of pure titanium materials is very small, so when rolling tall cylindrical thin-walled pure titanium rings, the titanium billet will be more unstable, so the titanium billet is easier to roll. Climbing rollers, flippers and ellipticals. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a stable rolling process for ...

AI Technical Summary

Problems solved by technology

The thermal conductivity and fluidity of pure titanium materials are very poor, and the rolling temperature range of pure titanium materials is very small, so when rolling...