关键词: 凝固过程, 蠕虫状石墨, 蠕虫状石墨铸铁

Abstract: Solidification process of CV graphite iron with the addition of various CV-graphitizing materials and the crystallization behavior of the graphite during. The eutectic reaction was clarified. The two ,arrest stage on the cooling curve during the eutectic freezing were observed in the cast iron with CV graphite. In the first stage of the arrest, the spheroidal graphite nucleated prior to the eutectic freezing and grew with austenite shell. The CV graphite was formed in the second stage and grew in contact with the liquid due to partial dissolution of the austenite shell surrounding the graphite spheroid. Accordingly, it was suggested that the graphite nodules formed in the first stage of e4tectic freezing were served as the starting point of CV graphite growth.

Key words: 凝固过程, 蠕虫状石墨, 蠕虫状石墨铸铁