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Effect of rotating magnetic field on the solidification microstractures of Pb-Sn alloys

机译:旋转磁场对Pb-Sn合金凝固组织的影响

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摘要

The influence of the rotating magnetic field (RMF) on the solidification process of Pb-Sn binary alloys is studied by comparing the solidification microstructures under the common condition and RMF condition. It is found that the RMF can completely eliminate the gravity induced macrosegregation, and result in dendrite fragmentation and promote solute diffusion velocity. These differences are regarded as the effect of complicated melt flow caused by RMF. Moreover, when the content of the primary phase is small, many spherical microstructures form under the RMF condition. The analyses indicate that these special microstructures are likely the conjunction action of melt flow and concentration and temperature field uniformity caused by RMF.
机译:通过比较常用条件和RMF条件下的凝固组织,研究了旋转磁场(RMF)对Pb-Sn二元合金凝固过程的影响。研究发现,RMF可以完全消除重力引起的宏观偏析,并导致枝晶碎裂和促进溶质扩散速度。这些差异被认为是由RMF引起的复杂熔体流动的影响。此外,当初级相的含量较小时,在RMF条件下会形成许多球形微结构。分析表明,这些特殊的微观结构可能是由R​​MF引起的熔体流动,浓度和温度场均匀性的共同作用。

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