摘要
概述了钢液中Ce及其化合物的热力学行为,预测了Ce加入钢液后的稳定化合物类型及其变化规律。阐述了Ce化合物粒子及固溶Ce对钢铸态组织的细化机理,并揭示了其细化凝固组织的规律。分析了Ce变质处理对钢铸态成分均匀性的改善效果,及其降低钢中元素偏析的机理。最后指出了稀土Ce改善钢铸态组织和均质性研究中尚未解决的几个问题,提出了该领域未来研究的主要方向。
The thermodynamic behavior of Ce and its compounds in molten steel was summarized,and the types of stable compounds after Ce added to molten steel and its variation were predicted.The mechanisms and rules of Ce compounds and dissolves Ce refining solidification structure of as-cast steel were summarized respectively.The improvement of homogenous by Ce was analyzed and the reason of decrease of element segregation was summarized.At last,some problems were pointed out which had not been solved in the research of rare earth Ce to improve the microstructure and homogeneity of steel,and put forward the main directions of the future research in this field.
引文
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