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Non-metallic particles, especially alumina, are the main inclusions in aluminum and its alloys. Numerical simulation and the corresponding experiments were carried out to study the motion behavior of alumina particles in commercial pure aluminum under high frequency magnetic field. At the meantime, multi-pipe experiment was also done to discuss the prospect of continuous elimination of non-metallic particles under high frequency magnetic field. It is shown that: 1) results of numerical simulation are in good agreement with the experimental results, which certificates the rationality of the simulation model; 2) when the intensity of high frequency magnetic field is 0.06 T, the 30 μm alumina particles in melt inner could migrate to the edge and be removed within 2 s; 3) multi-pipe elimination of alumina particles under high frequency magnetic field is also effective and has a good prospect in industrial application. 相似文献
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高频磁场电磁净化模拟 总被引:5,自引:0,他引:5
为了更准确地分析高频交变电磁场对金属熔体中的非金属夹杂物的去除效果,分别利用硅含量为18%、12.6%和10%3种铝硅合金所生成的尺寸为100、50和10μm的硅块来模拟非金属夹杂物以进行电磁净化实验研究.实验证明:生成的硅块可以更好地模拟金属液中单个的非金属夹杂物;施加电磁场后发现,电磁挤压力对单个尺寸在100和50 μm的非金属夹杂物的去除效果明显,同时也可以去除10 μm左右的非金属夹杂物. 相似文献
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在利用高频磁场制备表面自生复合材料中,对合金熔体在各个温度区间施加磁场时的凝固行为进行了研究。通过对Al—16wt%Si合金熔体的凝固温度区间进行合理的控制,制备出初生硅相向边沿有效偏聚的表面复合材料:中心部分为洁净的共晶区,外表面富集初生硅颗粒。实验结果表明,对Al—16wt%Si合金而言,施加磁场的最佳温度区间为580℃-600%,在磁场作用时间为20s时,即能实现对硅颗粒的有效偏聚。 相似文献
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