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通过Deform-3D软件对AZ80镁合金的挤压成形进行了数值模拟并进行了挤压试验,研究了模具、模芯以及挤压筒不同预热温度对静液扩展挤压成形过程的影响。结果表明,预热温度越高,成形所需挤压力越小,管材越容易成形;模具温度与模芯温度对挤压力峰值的影响较大,挤压筒温度主要影响挤压稳定阶段挤压力的平稳性。试验表明,在模具、模芯、挤压筒预热温度分别为250、250、20℃时,管材可完整成形,验证了AZ80镁合金静液挤压扩展成形工艺方法的可行性与数值模拟的合理性。
The extrusion of AZ80 magnesium alloy was carried out by Deform-3D software. The effects of different preheating temperature, such as mold, core and extruder barrel, on the hydrostatic expansion extrusion process were studied. The results show that the higher the preheating temperature is, the smaller the pressing force required for forming is and the easier the pipe is formed. The influence of the die temperature and the core temperature on the peak of extrusion pressure is large. The temperature of the extrusion cylinder mainly affects the extrusion stability Stable pressure. The test shows that the pipe can be formed completely when the preheating temperature of mold, core and extrusion cylinder are 250, 250 and 20 ℃, respectively, which verifies the feasibility and numerical simulation of extrusion process of AZ80 magnesium alloy by hydrostatic extrusion rationality.