【摘要】 在镁合金的凝固过程中施加低频或静态磁场都能有效细化晶粒,但静磁场的细化效果要优于低频交流磁场,同时随磁场强度的增加,静磁场细化晶粒的效果明显提高;在静磁场条件下,晶界共晶体组织的厚度明显减小,同时在晶内出现了大量细小块状化合物,这有利于提高镁合金的综合性能。更多还原

【Abstract】 Grain is refined when the magnesium alloy solidifies under magnetic field, especially under magnetostatic field, and the effect of magnetic field on refining grain increases with the increment of magnetic density. Higher magnetic density results in finer grain and thinner boundary eutectic, and much fine massive compound appears inside grain. Therefore the forming property of magnesium alloy is improved when magnesium alloy solidifies under magnetostatic field.更多还原