基于Deform的AZ31镁合金板材挤压工艺的有限元模拟

Finite Element Simulation of Extrusion Process of AZ31 Magnesium Alloys Sheet Based on Deform

为了研究温度对镁合金板材挤压的影响,通过Deform-3D对挤压速度10 mm/min和挤压温度300、350、400、450℃以及挤压温度400℃和挤压速度10、50、100、200 mm/min条件下的AZ31镁合金板材成形过程进行了数值模拟。结果显示,随着挤压温度升高,有效应变增大,流变应力减小。随着挤压速度增大,有效应变增大,有效应力随之增大。板材挤压过程中,板材的边部出现卷曲现象,距中心越远的部位有效应变越小,挤压变形也不均匀。因此,在挤压时需要根据实际情况选择合适的挤压温度。

In order to investigate the effects of temperature on the magnesium alloy sheet extrusion, the forming process of AZ31 magnesium alloy sheet was numerically simulated by Deform 3D under extrusion temperatures of300,350,400,450℃, extrusion speed of 10mm/min and extrusion temperature of 400℃, extrusion speeds of 10,50,100,200mm/min. The results show that the effective strain increases and the flow stress decreases with the increase of extrusion temperature. The effective strain and effective stress increase with the increase of extrusion speed. During the extrusion, the side on sheet produces crimping phenomenon. The more distant location is from the center, the smaller effective strain is, and the extrusion deformation is heterogeneous. Therefore, the extrusion needs to choose an appropriate temperature according to the actual situation.