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稀土镁球铁由于具有很多优点,在我国机械工业中已获得广泛应用。前几年,产量逐年增长。至一九七八年,全国年产量已达四十万吨以上。近一、两年来,由于球铁生产厂加强了生产管理和质量控制,采用了新工艺新技术,再加上稀土合金的质量也有新的改进,所以在稀土镁球铁的生产中,稀土镁球化剂的加入量普遍减少,废品率普遍下降,球铁质量普遍提高。如稀土镁球化剂的加入量,在冲天炉条件下,前几年多在1.5%以上,有的高达2%以
Rare earth magnesium ductile iron has many advantages in our country’s machinery industry has been widely used. A few years ago, the output increased year by year. By 1978, the national annual output has reached more than 400,000 tons. In the past one or two years, due to the intensification of production management and quality control of the ductile iron production plant and the introduction of new technology and technology, coupled with new improvements in the quality of rare earth alloys, rare earth magnesium The amount of nodulizer generally decreased, the rejection rate generally declined, the quality of ductile iron generally improved. Such as rare earth nodulizer addition, in the cupola conditions, a few years ago in more than 1.5%, and some as high as 2% to