Effect of driver roll rotational speed on hot ring rolling of AZ31 magnesium alloy

Based on the ABAQUS/Explicit code, A 3D elastic-plastic and coupled thermo-mechanical FE model of radial ring rolling of AZ31 Magnesium alloy has been proposed to analyze the influence of rotational speed of driver roll to study the inhomogeneity distribution of strain and temperature, fishtail coefficient, rolling force parameters. The results show that: (1) when the rotational speed of driver roll n increases, the strain distribution of the rolled ring becomes less homogeneous, and the temperature distribution more homogeneous yet, and leading to an optimal n value; (2) the fishtail coefficient firstly decreases, then increases with the increase of n; (3) the rolling force, contact area and rolling moment gradually descend with the increase of n.