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制成振动电磁场发生设备和旋转磁场发生设备。发现振动磁场能显著减少集中缩孔的侵入深度。在石墨型中安设钢网证实“型壁游离”是发生等轴晶的原因。两种工频电磁场都能细化铝合金的宏观组织并显著改变其微观结晶的形态,但两者的作用略有不同。
Made of vibration electromagnetic field generating equipment and rotating magnetic field generating equipment. It was found that the vibrational magnetic field can significantly reduce the penetration depth of the concentrated shrinkage cavity. The installation of stencils in the graphite type confirmed “wall free” as the cause of equiaxed grains. Both kinds of power frequency electromagnetic fields can refine the macrostructure of aluminum alloy and significantly change the morphology of its microscopic crystal, but the roles of the two are slightly different.