1.概述锶铝合金是国内近年来开发的一种优良合金变质剂,主要用于亚共晶及共晶铝硅合金的变质。其变质类型与传统使用的钠元素相当,但比钠有以下显著优点: 1.1 锶变质有效期长,可达6～8小时以上,重熔4～5次仍有变质效果,能够满足持续时间长的低压铸造和金属型铸造需要,特别适于浇注大型铸件和连续化生产。 1. Overview Strontium aluminum alloy developed in recent years is an excellent alloy modifier, mainly used for hypoeutectic and eutectic Al-Si alloy deterioration. The metamorphic type is equivalent to the traditional sodium element, but has the following significant advantages over sodium: 1.1 strontium metamorphism has a long effective period of more than 6 to 8 hours, remelting 4 to 5 times still metamorphic effect, to meet the long duration Low-pressure casting and metal casting needs, especially suitable for casting large castings and continuous production.