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对铝-硅合金进行变质处理,可以改善其力学性能和加工性能。锶是铝-硅合金强烈的变质剂,与钠比较,锶不仅有精炼作用,而且衰减很小,在液态合金中其变质作用能持续几个小时,且能重复熔化而其变质性能没有影响。国外
Modifying the aluminum-silicon alloy can improve its mechanical properties and processing properties. Strontium is a strong aluminum-silicon alloy modifier. Compared with sodium, strontium not only has the effect of refining, but also has little attenuation. Its metamorphism can last for a few hours in the liquid alloy and can be melted repeatedly without affecting its metamorphic properties. foreign