Study of the Influence of Asymmetric Multi-Roll Rolling on the Stress-Strain State of Deformed Metals

One of the promising methods for obtaining improved mechanical properties of metals and alloys is the process of dynamic recrystallization. Among the methods of activating and passing this process, one can single out asymmetric rolling. The paper considers the effect of various roll speed asymmetry schemes on the stress-strain state of the metal and the energy-force parameters during section rolling in a two-high stand and in a stand with a four-high pass. Based on numerical modeling in the QForm environment, it is shown that the use of various speed asymmetry options in a four-high pass will increase the value of effective deformation during rolling. Consequently, this will help to reduce the grain size of the deformed metal, which will lead to improved mechanical properties. In addition, the calculation of the energy-force parameters of the rolling process showed the possibility of reducing the rolling force with an increase in the asymmetry coefficient.