The flow stress model, the dynamic recrystallization (DRX) model, the grain growth (GG) model and the Normalized Cockcroft-Latham (NC-L) ductile fracture criterion are integrated into the finite element (FE) model to simulate the physical field and DRX evolution of the AZ80 magnesium (Mg) alloy wheel forming process by the rotating back extrusion (RBE) process. The deformation behavior of the AZ80 Mg alloy wheel during the forming process is calculated quantitatively when the angular velocity (\(\omega\)) is 0 to 80°/s. Findings revealed that the RBE process increases the deformation heat and effective strain in the forming process of the wheel, and refines the grain size of the whole wheel. However, excessive angular velocity (\(\omega\) > 40°/s) is not conducive to the DRX of the wheel bottom, which makes the grain at the wheel core grow abnormally and reduces the uniformity of the microstructure distribution at the wheel bottom. The damage factor value at the upper rim increases with the increase in \(\omega\), i.e., the tendency of the upper rim to crack increases. Therefore, the \(\omega\) of the Mg alloy wheel produced by the RBE process within the scope of this study should be set at 40°/s. The RBE process of the Mg alloy wheel can provide a new idea for the plastic forming of Mg alloy wheels.

将流变应力模型、动态再结晶（DRX）模型、晶粒生长（GG）模型和归一化Cockcroft-Latham（NC-L）延性断裂准则集成到有限元（FE）模型中以模拟物理场和DRX 是 AZ80 镁 (Mg) 合金车轮成型工艺的演变，采用旋转反向挤压 (RBE) 工艺。定量计算了角速度( \(\omega\) )为0~80°/s时AZ80镁合金轮毂成形过程中的变形行为。结果表明，RBE工艺增加了车轮成形过程中的变形热和有效应变，细化了整个车轮的晶粒尺寸。但过大的角速度（\(\omega\)  > 40°/s）不利于轮底的DRX，使轮芯处晶粒异常长大，降低轮处微观组织分布的均匀性底部。上缘处的损伤因子值随着\(\omega\)的增大而增大，即上缘破裂的倾向增大。因此，本研究范围内RBE工艺生产的镁合金轮毂的\(\omega\)应设置为40°/s。镁合金轮毂RBE工艺可为镁合金轮毂塑性成形提供新思路。