（内蒙古科技大学材料与冶金学院，内蒙古包头 014010）
摘要：采用光学显微镜观察、扫描电镜分析、硬度测试及拉伸试验等手段和方法，对稀土Ce在IF钢中的微合金化作用进行了研究。结果表明：在IF钢中，稀土Ce能够细化铁素体晶粒，质变TiN复合夹杂，提高硬度，改善塑性。
关键词：Ce；IF钢；显微组织；塑性
中图分类号：TG142.13 文献标识码：A
Theeffect of Rare-Earth Ce on Microstructure
andPlasticity of IF Steel
LIU Xiang-jun，YANG Ji-chun，YANGChang-qiao
(Material and Metallurgy School, Inner Mongolia University of Science andTechnology,
Baotou 014010, China)
Abstract：Themicrostructures，inclusions and mechanical properties of theIF steel containing Ce were investigated using metallographic microscopy，scanning electron microscopy， and universal tensile testing machine. The resultsshow that Ce could not only distinctly improve the microstructures of the steel，refine the grains and modify the inclusions，but improve the hardness and plasticity.
Key words: Ce; IF steel; Microstructure; Plasticity