摘要
通过光学显微镜、扫描电子显微镜和X射线衍射分析等检测手段,研究了稀土铈(Ce)对钢铸态组织、碳化物析出尺寸以及碳化物形态的影响。利用FactSage热力学软件的Equilib模块,计算并分析了钢凝固过程中稀土夹杂物的析出类型变化。结合二维晶格错配度理论计算和实验结果表明,加入微量铈后,钢中形成的稀土夹杂物可以作为γ-Fe固溶体及碳化物的异质形核核心,钢中大尺寸碳化物数量减少,同时促进了碳化物在钢中的均匀分布。钢的枝晶组织和碳化物析出尺寸得到了显著细化,析出的碳化物形态从复杂的棒状变为相对单一的片状。
The effect of rare earth cerium(Ce)on the as-cast microstructure of the steel,the size of carbide precipitation,and carbide morphology,were systematically studied through optical microscopy,scanning electron microscopy,and X-ray diffraction.Besides,through the Equilib module of the FactSage thermodynamics software,the changes in the precipitation type of the inclusions with Ce during the solidification of the steel were calculated and analyzed.The theoretical calculation and experimental results showed that,the rare earth inclusions formed in steel after adding Ce can be used as the core of heterogeneous nucleation of γ-Fe solid solution and carbide,which reduce the amount of large size carbide and promote the uniform distribution of carbide in the as-cast steel.In addition,the as-cast microstructure and carbide precipitation size of the steel have been significantly refined,and the precipitated carbide morphology changes from a complex rod shape to a relatively single lamellar shape.
作者
卫晓辉
韩啸
乔西亚
庄振
Wei Xiaohui;Han Xiao;Qiao Xiya;Zhuang Zhen(School of Materials and Metallurgy,University of Science and Technology Liaoning,Liaoning,114051)
出处
《当代化工研究》
CAS
2023年第23期42-44,共3页
Modern Chemical Research
基金
辽宁科技大学国家自然科学基金项目“非平衡态下多组分熔渣反应过程中的界面化学冶金行为”(项目编号:51874171)。
关键词
碳化物
铸态组织
铈
二维晶格错配度
carbide
as-cast microstructure
cerium
two-dimensional lattice mismatch
