用定向凝固和电解萃取—放射性同位素测量技术,分析了球化剂Ce在球铁各相中的分布;配合测量石墨球化率,确定了球铁含Ce量与石墨球化程度的关系,结果表明:Ce在球铁中主要以合金化Ce的形式存在,但石墨相Ce含量是石墨球化程度的表征值;只有当石墨相Ce含量高于一定值时,石墨才能完全球化。
The dependence of nodularization of graphite upon Ce content in RE nodularcast iron, prepared by directional solidification, has been investigated by electrolytic extrac-tion-radioisotope assay analysis of Ce in each phase of the iron together with measurement ofnodulized graphite. Results show that the Ce occurs mainly as alloyed form. In the graphitephase, the Ce content is believed to be characterization of nodularization. The graphite wouldcompletely nodulized only the Ce is over a certain content in graphite phase.
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