皮尔格轧制AZ31镁合金管材微观组织预测

Microstructure Prediction of Pilger Rolled AZ31 Magnesium Alloy Pipe

摘要:

精准预测镁合金管材在皮尔格轧制变形过程中的晶粒演变，对控制镁合金管材的最终性能具有重要参考意义，本文结合AZ31镁合金管材在皮尔格轧机上的轧制实验，建立基于动态再结晶、静态再结晶、静态回复、晶粒粗化及晶粒拓扑变形的元胞自动机模型，并借助有限元计算得出的每道次轧制结果，与元胞自动机结合起来，得到镁合金管材在轧制过程中的晶粒演变的动态特征，发现晶粒在轧制过程中产生连续再结晶并细化，并最终进行实验验证。

Abstract:

It is of great significance to predict the grain evolution of magnesium alloy pipe in the process of pilger rolling deformation in real time for controling the final performance of the magnesium alloy pipe. In this paper, the cellular automata model based on dynamic recrystallization, static recrystallization, static recovery, grain coarsening and grain topological deformation was established by rolling experiments on AZ31 magnesium alloy pipes on a Pilger mill.Finally, the results of each pass obtained by the finite element calculation are combined with the cellular automata to obtain the grain evolution of the magnesium alloy pipe in the rolling process in real time. It is found that the grains are continuously generated during the rolling process. and was finally verified by experiments.