基于ABAQUS/Explicit平台建立了AZ31镁合金环件径轴向热轧的三维弹塑性热力耦合有限元模型,分析了芯辊直径对成形环件的应变和温度分布不均匀性以及轧制性能的影响。结果表明,随着芯辊直径的增加,成形环件的等效应变和温度分布越来越均匀;同时轧制力和径向轧制力矩逐渐增大,轴向轧制力矩逐渐减小。 Based on the ABAQUS / Explicit platform, a three-dimensional elastic-plastic thermal-mechanical coupling finite element model of axial hot rolling of AZ31 magnesium alloy rings was established. The influence of core roller diameter on the strain and temperature distribution inhomogeneity and rolling properties of the ring was analyzed . The results show that with the increase of core roll diameter, the equivalent strain and temperature distribution of the forming ring are more and more uniform. Meanwhile, the rolling force and radial rolling moment increase gradually and the axial rolling moment decreases gradually.