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Solidification Structure of Cu-Fe Alloy under a Rotary Electromagnetic Stirrer

机译：旋转电磁搅拌器下Cu-Fe合金的凝固结构

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The effect of rotary electromagnetic stirring(EMS)on the Cu grain size and Fe dendrites is investigated in this paper,in order to get a Cu-Fe alloy ingot with good quality.The macro-and micro-structures are observed by Leica-DMR optical microscope.The solidification structures of Cu-2 and 8wt.％Fe consist with finer equiaxed grains.The Cu grain size is most sensitive to the Fe content.EMS can't effectively improve the grain size for the Cu-Fe alloy.For ingot cooled without EMS,there are also many large Fe-rich particles distribute in the Cu-matrix,beside the Fe dendrites,because of the existence of metastable miscibility gap in the undercooled liquid state.And the Fe-rich phases are not found in the ingots with EMS,indicating the EMS can affect the undercooling of the liquid and further restrain the liquid phase separation.Under the EMS,the Fe dendrites break up into many smaller Fe fragments.And the size of Fe fragments decreases with the increasing stirring current.
机译：本文研究了旋转电磁搅拌（EMS）对Cu晶粒尺寸和Fe树枝状物的影响，以获得具有良好质量的Cu-Fe合金锭。用Leica-DMR观察到宏观和微结构光学显微镜。Cu-2和8wt的凝固结构。％Fe包含更精细的等式晶粒。Cu粒径对Fe含量最敏感。对于Fe含量，不能有效地改善Cu-Fe合金的晶粒尺寸。如此没有EMS冷却锭，还有许多大的Fe富含Fe富含Fe型颗粒的颗粒在Fe Dendrites旁边分布，因为在过冷液态中的亚稳态混溶性间隙存在。未发现Fe的阶段具有EMS的铸锭，表明EMS可以影响液体的过冷，并进一步抑制液相分离。在EMS中，Fe Dendrites分解成许多较小的Fe片段。并且Fe片段的尺寸随着搅拌电流的增加而降低。

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