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本文利用真空低压铸造工艺来制备镁合金和铝合金试样,选择该铸造工艺过程为模拟对象,根据相似原理,在有机玻璃模型中用液体作为流体,对金属镁液和铝液的真空低压铸造过程进行了模拟试验研究。试验表明,在利用真空低压铸造工艺来制备镁合金和铝合金试样的过程中,原型的渗流液面是以平面沿铅垂方向向上推进的,位移和时间的关系满足四次方根规律;当真空度为-0.01MPa、外加气压为0.02MPa时为镁液最佳的工艺参数;当真空度为-0.02MPa、外加气压为0.02MPa时为铝液最佳的工艺参数。实验还将模拟实验的结果与原型进行了对比,模型的充填时间与原型的充填时间一致性良好,证实了本实验结果的正确性。
In this paper, the vacuum low-pressure casting process to prepare magnesium alloy and aluminum alloy samples, select the casting process as a simulation object, according to the similarity principle, in the plexiglass model with liquid as a fluid, magnesium metal and liquid aluminum vacuum low pressure casting Process simulation test. Experiments show that in the process of using vacuum low pressure casting process to prepare magnesium alloy and aluminum alloy sample, the infiltration liquid level of the prototype is pushed up in a vertical plane and the relationship between displacement and time satisfies the quadratic root square rule; When the vacuum degree is -0.01MPa and the applied pressure is 0.02MPa, it is the best technological parameter of magnesium solution. When the vacuum degree is -0.02MPa and the applied pressure is 0.02MPa, it is the best technological parameter of molten aluminum. The experiment also compared the result of simulation experiment with the prototype. The filling time of the model is in good agreement with the filling time of the prototype, which proves the correctness of the experimental results.