Cherepovets State University, Cherepovets, Russia

A. V. Kozhevnikov, Dr. Eng., Associate Prof., Head of the Dept. of Electric Power and Electrical Engineering
D. L. Shalaevskiy, Cand. Eng., Associate Prof., Dept. of Metallurgy, Mechanical Engineering and Process Equipment, e-mail: shal_dmitrij@yandex.ru
Yu. V. Platonov, Head of the Laboratory, Dept. of Electrical Power Engineering and Electrical Engineering
I. A. Kozhevnikova, Dr. Eng., Associate Prof., Head of the Dept. of Metallurgy, Mechanical Engineering and Process Equipment

The paper presents the results of studying the process of asymmetric rolling by the mentioned methods. The creation of different conditions on the upper and lower surfaces of the roll in the deformation zone in the study was performed by lower and upper rolls, with barrels of different diameters, which were given the same angular velocity relative to their axes of rotation. Analytical formulas are obtained that determine the energy-power and structural parameters of an asymmetric deformation zone, which made it possible to determine the patterns of the influence of rolling conditions on the energy-power and structural characteristics of an asymmetric deformation zone. The most significant, interesting factor here was the amount of energy consumption for the conduct of the technological process. It has been established that the asymmetry factor has little effect on the energy efficiency of rolling. The results were checked for validity by modeling the process in the DEFORM environment, the results of such a check confirmed the reliability of the solutions. Experimental rolling of steel samples was carried out on a laboratory mill 400 in rolls with different diameters of the barrels of the upper and lower rolls to assess the distribution of the shape and size of the grain along the height of the section of the finished strip. It was found that the coefficient of grain asymmetry at the surface of the strip that was in contact with the roll barrel, which had a higher speed, was greater than the similar parameter at the surface of the strip, which was in contact with the roll barrel, which had a lower speed. The results of the work can be used in determining the largest allowable difference in the diameters of the barrels of work rolls, obtained as a result of their regrinding, in existing cold rolling mills, taking into account the active layer.
The study was supported by the Russian Science Foundation grant No. 23-29-00428, https://rscf.ru/project/23-29-00428/.
A. S. Smirnov, K. P. Korepina participated in this work.

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