1、序言铸铁在感应炉熔化中,适当提高含S量后,若在后期添加增碳剂,激冷急剧减少。其理由可认为是,S延迟了增碳剂在铁水中的分散和溶解,凝固时残存的未溶解石墨成为析出石墨核生成及成长基底。关于S对增碳剂的溶解延迟作用已经报导过,故本文论述未溶解石墨与石墨核生成及成长有关的实验结果。 1, Preface Cast iron in the induction furnace melting, the appropriate increase in S content, if added later in the carbon agent, quench sharply reduced. This is presumably because S delays the dispersion and dissolution of the recarburiser in the molten iron, and the remaining undissolved graphite at the time of solidification becomes the base of precipitated graphite nucleation and growth. The effect of S on the dissolution delay of the recarburizer has been reported, so the experimental results on the formation and growth of graphite nuclei of undissolved graphite are discussed.