铸造2012，Vol.61Issue(4)：357-361,5.
球墨铸铁石墨球核心组成及形核机制的研究
Phase Composition and Nucleation Mechanism of Spheroidal Graphite Nucleus in Ductile Iron
摘要
Abstract
The morphology, size and composition of spheroidal graphite (SG) nuclei were researched by casting a series of different samples which were treated by the same nodulizer and different inoculants. Wedge and chill test pieces used for chemical analysis were cast. The observation of the SG nucleus was done by using of FE-SEM. The results indicate that the morphologies of SG nuclei are different, including spherical, conical, polygonal and so on. The SG nucleus consist of sulfide, oxide and carbide, and the size is about 0.6-7 μm. Not only single core but also double and multiple cores are found in SG nuclei. The mismatch between most nuclei compounds and graphite is small, so compounds are good nucleating sites for SG. For the δ between the SiO2 and graphite is large, SiO2 can act as spherical graphite substrate only after the combination with SiC.关键词
球墨铸铁/石墨球核心/异质形核/形核机理Key words
ductile iron/ spheroidal graphite nuclei/ heterogeneous nucleation/ mechanism of nucleation分类
矿业与冶金引用本文复制引用
申志清,田学雷,郑洪亮,李桐桐,徐岩,许荣福,张宁..球墨铸铁石墨球核心组成及形核机制的研究[J].铸造,2012,61(4):357-361,5.基金项目
2009年度山东省优秀中青年科学家科研奖励基金计划(BS2009ZZ005). （BS2009ZZ005）
