基于DEFORM-3D软件的AZ31镁合金管材反挤压过程计算机模拟研究

Computer Simulation Study on Backward Extrusion Process of AZ31 Magnesium Alloy Tube Based on DEFROM-3D Software

通过DEFORM-3D软件对AZ31镁合金在300℃进行了不同壁厚(5、2.5、1mm)管的反挤压成形模拟。结果表明,在300℃能成功地反挤成形,但挤压过程中变形不均匀。随着离试样中心位置的距离增大,变形有效应变先增大后减小,这主要与反挤压过程中材料流动的不同有关。总之,在300℃能够反挤压成形管壁1mm的镁合金筒形件。

The backward extrusion forming process of AZ31 magnesium alloy tube with different wall thickness（ 5, 2.5,1mm） at 300℃ was simulated by using DEFORM-3D software. The results show that the backward extrusion can be performed successfully at 300℃, but the deformation is un-homogeneous in extrusion process. The effective strain increases firstly then decreases with the distance increasing from the specimen center position. This is mainly related to the difference of material flow in backward extrusion process. In a word, magnesium alloy tube parts with the wall of 1mm can be formed at 300℃ in backward extrusion.