以Zn-10 wt%Bi的过偏晶合金作为研究对象,在强磁场条件下,考察了不同电磁体积力对其显微凝固组织与凝固过程的影响.实验结果表明,在一定的强静磁场下,当交变电流增加到某一特定值时(交变电流频率为50 Hz),得到的凝固组织最为均匀,第二相颗粒直径也达到最小;在固定交变电流值的条件下(交变电流频率为50Hz),Zn-10 wt%Bi合金的凝固组织随着磁感应强度的增加,其偏析程度、弥散程度和第二相Bi颗粒的大小都有明显的改善.实验分析结果表明,磁场复合交变电流产生的电磁体积力的大小,对合金凝固组织都有显著影响,通过控制磁感应强度和交变电流大小,从而获得较为理想的过偏晶合金凝固组织. The effect of different electromagnet forces on the microstructure and solidification process of Zn-10 wt% Bi supergrinding alloy was studied under strong magnetic field.The experimental results show that under certain strong static magnetic field , When the alternating current is increased to a certain value (the alternating current frequency is 50 Hz), the solidified microstructure is the most uniform and the diameter of the second phase particles reaches the minimum. Under the conditions of constant alternating current The frequency of current change is 50Hz), the segregation degree, dispersion degree and the size of Bi particles in the second phase of Zn-10wt% Bi alloy are obviously improved with the increase of the magnetic flux density.The experimental results show that the magnetic field The magnitude of the electromagnet volume force generated by the composite alternating current has a significant influence on the solidified microstructure of the alloy. By controlling the magnetic induction intensity and the alternating current, the ideal solidified microstructure of the over-crystallized alloy is obtained.