中文摘要：

在半固体 A357 铝合金泥浆的微观结构上倒温度和体环差距宽度的效果由体环准备了电磁激动人心(AEMS ) 技术被调查。低流温度和狭窄的体环豁开的结果表演对获得有益小球形主要(艾尔) 阶段。更低的流温度是并且体环差距宽度越小，越多制服，越多更小并且更多球形微观结构。微观结构获得了由平常电磁激动人心并且 AEMS 被比较。结果显示主要(艾尔) 粒子是球状的，小并且在 AEMS 获得的泥浆同类地散布。但是在泥浆获得了由平常电磁激动人心，主要(艾尔) 粒子是在泥浆的边的小树突，他们大、在像插座或树枝状泥浆内部。

英文摘要：

The effects of pouring temperature and annulus gap width on the microstructure of the semi-solid A357 aluminum alloy slurry prepared by annulus electromagnetic stirring（AEMS） technology were investigated. The results show that low pouring temperature and narrow annulus gap are advantageous to obtaining the small spherical primary a（Al） phase. The lower the pouring temperature is and the smaller the annulus gap width is, the more uniform, the smaller and the more spherical the microstructure is. The microstructures obtained by the ordinary electromagnetic stirring and AEMS were compared. The results indicate that the primary a（Al） particles are globular, small and distribute homogeneously in the slurry obtained by AEMS. But in the slurry obtained by the ordinary electromagnetic stirring, the primary α（Al） particles are small dendrites in the edge of the slurry and they are large and rosette-like or dendritic in the inner of the slurry.