基于Deform 3D的AZ31B镁合金棒材挤压过程的有限元模拟  

Finite Element Simulation of Extrusion Process of AZ31B Magnesium Alloys Based on Deform 3D

作　　者：殷铭[1] 徐立华[1] 

机构地区：[1]苏州工业职业技术学院,江苏苏州215104

出　　处：《热加工工艺》2015年第9期176-178,共3页Hot Working Technology

摘　　要：为了研究不同温度对镁合金挤压的影响,运用Deform 3D软件分别对AZ31B镁合金棒材在300、350、400、450℃的挤压过程进行了有限元模拟。结果表明,随着温度升高,合金的有效应变增大,流变应力减小。这种现象主要与非基面滑移的开动以及动态再结晶的开动有关,释放了应力集中,软化了材料。由于挤压过程中材料上下流动不一样,造成挤压后棒材弯曲现象。随着温度的升高,弯曲趋势随之增大。In order to investigate the effects of different temperatures on the magnesium alloys extrusion, the extrusion process of AZ31 B magnesium alloys at 300,350,400,450℃ was simulated respectively by using finite element software Deform 3D. The results show that the effective strain of the alloy increases and the flow stress decreases with the increase of temperature. This phenomenon is mainly related to the non-basal slipping motion and the start of dynamic recrystallization,which releases the stress concentration and softens material. As the upper and lower material flow is dissimilarity in the extrusion process,bending phenomenon of the bar material is produced after the extrusion. The bending trend increases with the increase of temperature.

关 键 词：AZ31B镁合金 挤压温度 有限元模拟 

分 类 号：TG379[金属学及工艺—金属压力加工]