电磁搅拌法制备铝合金半固态浆料过程中磁场和流场的数值模拟  

Numerical Simulation of Electromagnetic Field and Flow Field in the Course of Preparation Semi-solid Slurry of Aluminum Alloy

作　　者：陈兴润[1] 张志峰[1] 梁博[1] 徐骏[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088

出　　处：《铸造技术》2010年第4期482-486,共5页Foundry Technology

基　　金：国家高技术研究发展项目(No.2006AA03Z115);国家重点基础研究规划项目(No.2006CB605203)

摘　　要：利用ANSYS软件,对电磁搅拌作用下铝合金半固态浆料中的电磁场和流场进行数值模拟。分析电流强度和频率变化对磁感应强度的影响,并分析粘度变化对熔体流动速度的影响。结果表明,在电磁力的作用下,铝合金熔体在水平方向上产生旋转流动;由于感应电流的集肤效应,合金熔体中的电磁力由外向内依次减小;在相同频率下,半固态浆料中的磁感应强度随着电流强度的增加而增加;在相同电流强度下,磁感应强度随着频率的增加而减小;随着半固态浆料的温度降低,其粘度增大,流动速度减小。The electromagnetic fields and flow fields in semisolid slurry of aluminum alloy during electromagnetic stirring were simulated by ANSYS software, the influence of the intensity and frequency of current on the magnetic induction intensity was investigated. The influence of the viscosity on the velocity of slurry was also investigated. The results show that under electromagnetic force the aluminum alloy melt rotate at the horizontal directions Because of skin effect of induced current, electromagnetic force decrease from edge to centre; the magnetic induction intensity increased with the enhancement of current intensity at the same current frequency~ the magnetic density decreased with the enhancement of current frequency at the same current intensity; With the temperature of semisolid slurry decreased, the viscosity of semisolid slurry increased and the velocity of semisolid slurry decreased.

关 键 词：铝合金 半固态浆料 电磁搅拌 磁场 流场 数值模拟 

分 类 号：TG292[金属学及工艺—铸造]