In this study, the characteristics of microstructures in a liquid state were investigated; these microstructures were produced via electromagnetic stirring using semisolid forming methods. The spherical structures were studied under the application of variable currents using a large electromagnet in order to stir molten metal with a maximum weight of 5–20 kg, which is a range that is commonly used in industries. Moreover, the changes in the microstructures of metal slurries were investigated based on the type of crucible used. Additionally, the size and roundness of the primary α-Al particles were analyzed according to the variable input current. Crucibles composed of ceramics, SUS304, and HK40 were used for the experiment to measure electromagnetic forces. For the HK40 crucible, the average size of the primary α-Al particles was 67.8 µm and their roundness was 2.4. When a current of 120 A was applied, these values were 21.40 µm and 2.3. Thus, it could be concluded that the stirring was well-executed under an input current of 120 A.

在这项研究中，研究了液态微观结构的特性；这些微结构是使用半固态成型方法通过电磁搅拌产生的。使用大型电磁体在可变电流的作用下对球形结构进行了研究，以搅拌最大重量为5-20 kg的熔融金属，这是工业上通常使用的范围。此外，根据所用坩埚的类型，研究了金属浆料的微观结构的变化。另外，根据可变的输入电流分析了初级α-Al颗粒的尺寸和圆度。实验中使用由陶瓷，SUS304和HK40组成的坩埚来测量电磁力。对于HK40坩埚，一次α-Al颗粒的平均尺寸为67。8微米，其圆度为2.4。当施加120A的电流时，这些值为21.40μm和2.3。因此，可以得出结论，搅拌是在120 A的输入电流下进行的。