AZ系列镁合金热模拟挤压过程中挤压力的研究
Extrusion Force of AZ Series Mg Alloy During Thermal Simulated Extrusion Forming
彭 建1,2, 周 绸1, 李 权1
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作者单位：(1. 重庆大学 材料科学与工程学院, 重庆 400044; 2. 重庆市科学技术研究院, 重庆 401123)
中文关键字：镁合金； 挤压力； 热模拟； 均匀化
英文关键字：magnesium alloy; extrusion force; thermal simulation; homogenization
中文摘要：通过在Gleeble1500D热模拟试验机上对AZ10、AZ31、AZ61和AZ91镁合金进行模拟挤压，并对热模拟挤压成形过程中的挤压力进行测定，研究AZ系列镁合金热模拟挤压成形过程挤压力及其组织变化。研究结果表明，在AZ系列镁合金中，随着合金元素含量的增多，挤压力逐渐增大，并且同种镁合金在挤压前经均匀化退火处理后所需的挤压力比未经均匀化处理的合金所需挤压力大，动态再结晶是影响其挤压力大小的决定性因素。
英文摘要：AZ10, AZ31, AZ61 and AZ91 magnesium alloys were deformed with simulated extrusion system on Gleeble 1500D, which can determine the extrusion force during extrusion forming process. The microstructure of the alloys and the evolution of extrusion force were investigated. The results show that the extrusion force increases gradually with the increase of alloy element. Aimed at the same magnesium alloy, the deformed alloy with previous homogenization before extrusion has more extrusion force than that without homogenization, and dynamic recrystallization is a decisive factor in extrusion force during extrusion forming.