研究了电磁搅拌对ＺＬ１０１Ａ 铝合金显微组织的影响， 阐明了不同搅拌工艺条件下ＺＬ１０１Ａ铝合金的显微组织的变化规律。结果表明： 在磁场强度大于０ ．０６５ Ｔ 的ＥＭＳ作用下，ＺＬ１０１Ａ 合金能够得到非树枝晶组织； 未经细化处理， 晶粒尺寸在１００ ～３００ μｍ 范围内； 随着ＥＭＳ 作用的增强， 晶粒向完全椭球形发展； 本实验条件下ＥＭＳ 没有细化共晶Ｓｉ 的作用， 也没有改变共晶Ｓｉ 的析出形态； 搅拌作用与合金凝固速度的良好匹配是得到理想非树枝晶组织的关键 The effects of electromagnetic stirring on the microstructure of ZL101A aluminum alloy were studied. The variation of microstructure of ZL101A aluminum alloy under different stirring conditions was clarified. The results show that: the magnetic field intensity is greater than 0. 065 T under the action of EMS, ZL101A alloy can get non-dendritic microstructure; without refinement, the grain size in the range of 100 ~ 300 μm; with the enhancement of EMS, the grain to fully ellipsoid development; this experiment Under the conditions of EMS did not refine the eutectic Si role, did not change the eutectic Si precipitation morphology; stirring and the solidification rate of the alloy is a good match to get the ideal non-dendritic structure of the key