In the rolling process of Tantalum Foil, the application of tension is an important means to control the thickness, adjust the shape of sheet metal and ensure the smooth rolling process.The application of the front and rear tension can reduce the unit rolling force and control the thickness change of the strip in the rolling process to a certain extent, but the influence of the rear tension on the rolling force is greater than that of the front tension,And can make the rolling process stable; The main function of the front tension is to obtain a satisfactory shape, and is conducive to the normal rolling process, can prevent "slipping".Therefore, in the rolling process, it is often necessary to adjust the pre - and post-tension difference according to the rolling condition, in order to control the plate shape and longitudinal thickness difference.

In the process of tantalum foil rolling, off-tracking and strip breaking are the most common problems. Through a large number of tests, it is found that the improper setting of front and rear tension is a very important cause of deviation and broken belt, especially for the thickness of ultra-thin foil less than 0.05mm rolling by the front and rear tension difference is more obvious.