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一、前言我省有丰富的重稀土资源,蕴藏量大,品质优良,这是我省的优势。近年来,随着科研和生产的发展,稀土元素的应用日趋广泛。其中,对于钇基稀土球墨铸铁的制造和使用已经作了许多研究工作,取得了显著的成效。钇基重稀土元素作为球化剂,具有抗球化衰退能力强的优点,可以解决大型轧辊大断面曲轴中心球化不良的问题。在钇基球铁的冶炼中,为了
First, the preface Our province is rich in heavy rare earth resources, reserves, quality, which is the advantage of our province. In recent years, with the development of scientific research and production, the application of rare earth elements is increasingly widespread. Among them, many studies have been made on the manufacture and use of yttrium-based rare-earth nodular cast iron, and remarkable results have been obtained. Yttrium-based heavy rare earth elements as a nodulizer, with the anti-nodular recession advantages, can solve the problem of large spheroidal nodules in large roller center bad ball. In yttrium-based ductile iron smelting, in order to