电流在电磁搅拌制备SiC/C19400复合材料中的影响

Effect of Current on the Preparation of SiC/C19400 Composites by Electromagnetic Stirring

采用有限元软件对电磁搅拌过程进行数值模拟,研究电流对磁感应强度及洛伦兹力的影响规律。通过模拟计算结果显示,模型在通电线圈围合的范围内产生了感应磁场,且磁场强度呈现由模型中心向外缘线性上升的趋势,加载电流越大,磁场强度越大。在二维模型中距离熔体圆心30mm处取值,当电流为60A时,磁场强度为139.5mT,比电流为30A时提高了99%。此外,洛伦兹力的分布同样是从中心向熔体直径增大方向增加。表明了增加电流对电磁搅拌效果提高有积极的作用。

The effect of current on magnetic induction intensity and Lorentz force was studied by using finite element software to simulate the electromagnetic stirring process.The simulation results show that an induced magnetic field was generated within the enclosed current coil,and the magnetic field intensity linearly rises from the center of the model to the outer edge.The larger the current is,the greater the magnetic field intensity will be.In the two-dimensional model,the magnetic field strength was 139.5MT when the current was 60A,which was 99%higher than that when the current was 30A.In addition,the distribution of Lorentz force also increases from the center to the outer edge just as the increase of magnetic field strength.It shows that increasing current has a positive effect on the electromagnetic stirring effect.