20年来,国内外一直在研究将可锻铸铁成分的液态金属转变为典型的球墨铸铁,或采用变质孕育剂生产快速石墨化的可锻铸铁。近年来日、法、美、匈牙利等国家已有许多这方面资料的报导。本文是采用三种稀土 In the past 20 years, the domestic and foreign countries have been studying the transformation of liquid metal of malleable cast iron into typical ductile cast iron, or the use of metamorphic inoculants to produce rapidly graphitized malleable cast iron. In recent years, Japan, France, the United States, Hungary and other countries have many reports in this regard. This article is the use of three kinds of rare earth