中文摘要：

颤动和在 hypoeutectic Al-Si 合金的半固体泥浆的微观结构上更精制的谷物的效果被学习。液体的传送对流上的颤动的影响被使用水粒子 tracer 的一个系统进行。356 融化在 630660 的温度吗？

英文摘要：

The effects of vibration and grain refiner on the microstructure of semisolid slurry of hypoeutectic Al-Si alloy were studied. The impact of vibration on the convection of liquid was conducted by using a system of water-particle tracer. The 356 melt at temperature of 630-660 ℃ with or without grain refiner Al-5%Ti-1%B was poured into a metal cup as the vibrating vessel, then it was cooled to 590-610 ℃ in the semisolid zone and kept for some time, subsequently vibration with different frequencies was applied. The results show that the primary a（Al） particles become finer and rounder with the increase of vibration frequency. The slurry with primary a（Al） equivalent particle diameter（EPD） of about 90μm and average shape coefficient（ASC） of about 0.5 can be prepared under vibration of 20 Hz. With the combined action of vibration and grain refiner Al-5Ti-B, even smaller and rounder spheroids with EPD of about 85μm and ASC of about 0.6 are obtained.