轻质高强镁合金机匣可分凹模模锻工艺

Die Forging Process of Lightweight and High Strength Magnesium Alloy Casing with Separable Female Die

目的通过对新型镁合金材料Mg-5Gd-4Y-0.3Zr进行力学性能实验和成形工艺数值模拟分析,对镁合金机匣成形工艺进行设计优化和开发参考。方法采用Gleeble-3500热模拟试验机,得到该镁合金材料在不同温度、不同应变速率下对应的真应力数据,并建立材料模型,应用在有限元模拟分析中。结果经优化后的工艺方案能得到充型饱满、无质量缺陷的镁合金机匣锻件,并通过工艺实验,验证了该设计方案的可行性。结论采用可分凹模模锻成形,能够锻造出外形美观、强度达标的轻质镁合金机匣。

This work aims to optimize design and process reference by mechanical experiment and finite element simulation of Mg-5Gd-4Y-0.3Zr magnesium alloy forming process. Gleeble-3500 thermal simulation instrument was used to obtain the true stress data at different temperature and strain rate of magnesium alloy. A material model was built to be used in finite element simulation. The process program after optimization could obtain magnesium alloy casing of full shape and good quality. Process experiments proved that the design was feasible. Lightweight magnesium alloy casing of intact shape and high strength can be formed with separable female die.