Journal of South China University of Technology (Natural Science Edition) ›› 2021, Vol. 49 ›› Issue (9): 73-79.doi: 10.12141/j.issn.1000-565X.200014

Special Issue: 2021年材料科学与技术

• Materials Science & Technology • Previous Articles     Next Articles

Influence of Ce Addition on Microstructure and Corrosion Resistance to Molten Aluminum of Fe-Cr-B Alloys

CHEN Weiping1 LI Bing1 LING Zicheng1 FU Zhiqiang1 ZHANG Xianman2   

  1. 1.Guangdong Key Laboratory for Advanced Metallic Materials Processing，South China University of Technology，
    Guangzhou 510640，Guangdong，China；2.College of Electrical and Mechanical Engineering，Hainan University，
    Haikou 570228，Hainan，China
  • Received:2020-01-10 Revised:2020-05-30 Online:2021-09-25 Published:2021-09-01
  • Contact: 陈维平（1959-），男，博士，教授，博士生导师，主要从事金属材料制备与成形研究。 E-mail:mewpchen@scut.edu.cn
  • About author:陈维平（1959-），男，博士，教授，博士生导师，主要从事金属材料制备与成形研究。
  • Supported by:
    Supported by the National Natural Science Foundation of China (51701053)

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Abstract: Fe-Cr-B alloy has excellent corrosion resistance to molten aluminum，but its toughness is poor.In order to improve the toughness of Fe-Cr-B alloy，the influence of Ce addition （0~0.92%，mass fraction） on the microstructure，mechanical properties and corrosion resistance of Fe-Cr-B alloy in molten aluminum at 750℃ was investigated.The results show that the addition of Ce changes the boride structure in Fe-Cr-B alloy from a continuous network，dendritic and long rod-like structure to a short rod-like and block structure with less interconnection.With the Ce content increases，the alloy's impact toughness gradually increases，and the corrosion resistance to molten aluminum increases first and then decreases.The uniformly distributed short rod-like boride can improve the alloy's impact toughness while maintaining excellent corrosion resistance to molten aluminum.The Fe-Cr-B alloy with 0.59% Ce has the best comprehensive properties，its impact toughness is 187.97% higher than that of Ce-free，and its corrosion resistance to molten aluminum reaches 5.9 times that of typical die steel H13.

Key words: Fe-Cr-B alloy, boride, cerium, microstructure, molten aluminum corrosion

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