AZ31合金的挤压工艺数值模拟及参数优化

Numerical Simulation and Parameter Optimization of Extrusion Process for AZ31 Alloy

对AZ31合金热挤压过程中的工艺参数对温度场变化的影响进行了数值模拟与参数优化,并在优化工艺下得到了与腔体连接部分挤压型材的组织特征。结果表明,对挤压过程进行分段模拟的过程中,热挤压工艺参数和腔体温度都会对AZ31合金型材的温度场和显微组织产生重要的影响。其中,挤压速度、模具预热温度一致的条件下,AZ31合金挤压件的温度降主要与腔体温度有关;在优化参数工艺下得到的腔体区域和挤出区域的AZ31合金的组织都较为致密,没有出现气孔、夹杂等缺陷。

Influence of process parameters on the temperature field in the hot extrusion process of AZ31 alloy was simulated and the parameters were optimized. The results show that during the process of extrusion, hot extrusion process parameters and chamber temperature have an important influence on the temperature field and microstructure of AZ31 alloy. In the condition of uniform extrusion speed and die preheating temperature, the temperature drop of AZ31 alloy is mainly related to the cavity temperature.