中文摘要：

倒温度的效果，突然电磁与低力量激动人心然后浸泡 AISi7Mg 合金的微观结构上的处理被调查。Theresults 表演如果 AISi7Mg 合金在 630 或 650 deg C 被倒并且同时在一短时间在低力量由一块电磁的地搅动了，流的过程能容易被控制，大多数团结的主要 alpha-AI 谷物变得球形并且仅仅他们的一些象 arerosette 一样。弱电磁激动人心使温度地更同类并且让主要 alpha-AI 谷物在一个更大的区域分散，它导致主要 alpha-AI 谷物的球形的微观结构。当 AISi7Mg 合金以半固体状态被浸泡或再热时，主要 a-AI 谷物进一步成熟，他们变得更球形，它对 AISi7Mg 合金形成的半固体有利。

英文摘要：

The effects of pouring temperature, short electromagnetic stirring with low strength and then soaking treatment on the microstructure of AISi7Mg alloy were investigated. The results show that if AlSi7Mg alloy is poured at 630 or 650℃ and meanwhile stirred by an electromagnetic field at a low power for a short time, the pouring process can be easily controlled and most solidified primary α-Al grains become spherical and only a few of them are rosette-like. Weak electromagnetic stirring makes the temperature field more homogeneous and makes the primary α-Al grains disperse in a larger region, which leads to the spherical microstructures of primary α-Al grains. When the AISi7Mg alloy is soaked or reheated at the semisolid state, the primary α-Al grains ripen further and they become more spherical, which is favorable to the semi-solid forming of AlSi7Mg alloy.