Comprehensive Thickness Control Technology of 1180 MPa Grade Ultra-high Strength Steels in Cold Tandem Rolling.

To resolve the issues of thickness variation and thickness deviation at head and tail for ultra-high strength steels in continuous cold tandem rolling, a thickness deviation prediction model and a roll gap adjustment estimation model were established based on the metal mass flow equation firstly. In addition, a thickness control system was exploited, and optimal roll gap adjustment model was established. Finally, an optimization model for rolling speed and tension in the head and tail rolling processes of the strip steels was built. The first stand of continues cold tandem rolling unit was taken as the technical application objects to test the two typical ultra-high strength steels. The results demonstrate that the length of thickness deviation for the ultra-high strength steel AR4146E1 and DU6220A1 decreased from 70.3 m and 36.89 m to 16.85 m and 16.33 m respectively. [ABSTRACT FROM AUTHOR]