随着稀土元素在球墨铸铁上的广泛应用,炼制稀土——镁中间合金成了铸造球墨铸铁的重要一环。我们在这一工作中,利用硼砂做复盖剂,在提高熔炼温度,减少镁的氧化和降低劳动强度等方面,收到了一定效果,现将我们的体会介绍如下。 With the extensive use of rare earth elements in ductile iron, refining rare earth - magnesium master alloy has become an important part of casting ductile iron. In this work, we use borax as a covering agent and have achieved some results in raising the smelting temperature, reducing the oxidation of magnesium and reducing the labor intensity. Now, our experience is as follows.