Annulus electromagnetic stirring for preparing semisolid A357 aluminum alloy slurry  

作　　者：白月龙 徐骏 张志峰 石力开 

机构地区：[1]General Research Institute for Non-ferrous Metals

出　　处：《中国有色金属学会会刊：英文版》2009年第5期1104-1109,共6页Transactions of Nonferrous Metals Society of China

基　　金：Projects(2006AA03Z115;2009AA03Z534)supported by the Hi-tech Research and Development Program of China;Project(2006CB605203)supported by National Basic Research Program of China

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 primaryα(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 primaryα(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 primaryα(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.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.

关 键 词：电磁搅拌 制备温度 金浆料 半固态 铝 环形 浇注温度 水泥浆 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TF777[金属学及工艺—金属材料]