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

摘要：

　　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 cant 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.

关键词： Cu-Fe alloy rotary electromagnetic stirring grain size Fe dendrites

作者: QU Lei ZUO Xiao-wei WANG En-gang ZHANG Lin HE Ji-cheng

作者单位: Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education). Northeastern University,Shenyang 110819,Liaoning P. R. China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-5

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）