双向挤压与螺旋复合变形有限元分析

Finite element analysis of dual-directional extrusion and spiral compound deformation

以AZ31镁合金为研究对象,对双向挤压与螺旋复合变形模型进行工艺参数的数值模拟运算,分析工艺条件对AZ31镁合金在成型过程中等效应变和挤压力的影响。结果表明:双向挤压与螺旋复合变形可显著提高坯料变形过程的等效应变,随着挤压比的增加、挤压温度和挤压速度的升高,坯料所获得的等效应变值显著升高,双向挤压与螺旋复合变形AZ31镁合金的等效应变值可高达3.2。工艺条件的有限元分析为镁合金在双向挤压与螺旋复合变形的实际生产应用提供了重要参考价值。

The model of dual-directional extrusion and spiral compound deformation was proposed,and numerical simulation calculation of process parameters was carried out on the AZ31 magnesium alloy. The effect of process conditions on the equivalent strain and extrusion load during the formation of AZ31 Mg alloys was analyzed. The research results show that dualdirectional extrusion and spiral compound deformation can prominently increase the equivalent strain of billet during the deformation process,and with the increase of the extrusion ratio,extrusion temperature and velocity,the equivalent strain of deformed billet increases. The plastic strain of AZ31 Mg alloys can be as high as 3.2 after dual-directional extrusion and spiral compound deformation. Finite element analysis of process conditions can provide an important reference for actual production of dual-directional extrusion and spiral compound deformation of Mg alloys.