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本文采用电解分离-放射性测量法及显微自射线照相法研究了Ce及S在高纯Fe-C-Si合金各相中的分布和其对石墨形态的影响。实验结果表明:Ce除了与S,O形成夹杂外,首先在石墨中富集;随着合金中Ce含量的增加,石墨中Ce量趋于饱和,大量的Ce以合金化形式存在于铸铁之中;S也在石墨中富集,如合金中S含量继续增加,则以FeS形式存在于共晶团边界;合金中固溶S量极微;石墨形态与Ce在石墨中的吸附和镶嵌程度有关,呈饱和镶嵌吸附时,石墨程球状;呈半饱和态时,石墨为蠕虫状。
In this paper, the distribution of Ce and S in the phases of high-purity Fe-C-Si alloy and its effect on the morphology of graphite were studied by electrolytic separation-radiometry and microscopic self-radiography. The experimental results show that Ce is not only inclusified with S and O, but also enriched in graphite. With the increase of Ce content in the alloy, the amount of Ce in the graphite tends to be saturated and a large amount of Ce exists in the alloying state in the cast iron ; S is also enriched in graphite, such as the S content of the alloy continues to increase, then exist in the form of FeS eutectic group boundaries; alloy S amount of micro-solution; graphite morphology and Ce in graphite adsorption and mosaic level , Was saturated mosaic adsorption, graphite ball spherical; half-saturated state, the graphite is worm-like.