CREM法半连铸铝合金过程中最佳电磁场频率范围的确定  

Determination of Optimal Frequency on the Process of Semi-continuous Casting of Aluminum Alloy by CREM

作　　者：张勤 崔建忠[1] 张北江[1] 

机构地区：[1]东北大学材料电磁过程教育部重点实验室,辽宁沈阳110006

出　　处：《铸造》2004年第1期41-45,共5页Foundry

基　　金：国家重大基础发展规划项目"973"项目(编号:G199906490501)。

摘　　要：数值模拟了CREM法半连续铸造铝合金过程中,磁感应强度在空间和结晶器内部的分布;涡流在参考面上的速度通量以及液穴深度,结果证明存在一个最佳电磁场频率范围,并对此进行了实验验证。实验结果与数值模拟非常吻合,表明:频率在10～30Hz时,铸锭微观组织非枝晶化程度最高,溶质元素在基体中的固溶度最大,整体分布最为均匀。During the semi-continuous casting of aluminum alloy by CREM process, the distribution of magnetic flux density vector in space and melt; velocity flux as a function of radius of referenced cylinder under different frequency of electromagnetic field and the sump height are numerically studied. The results show that there is an optimal frequency range of electromagnetic field. In order to verity that, a series tests are also done subsequently. Their results are well coincide with each other. It is also show that in the range of 10～30Hz, the degree of non-dendritic structure of ingot is maximum; the distribution of alloying elements is most uniform and the solid solution of alloying elements in matrix is biggest promoted.

关 键 词：CREM法 半连续铸造 铝合金 最佳频率 

分 类 号：TG249.7[金属学及工艺—铸造] TG111.4