A Study on the Microstructures and Toughness of Fe-B Cast Alloy Containing Rare Earth

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• 作者：Dawei Yi (1)
  Zhiyun Zhang (1)
  Hanguang Fu (2)
  Chengyan Yang (3)
  Shengqiang Ma (4)
  Yefei Li (4)
  
  1. School of Materials Science and Engineering ; Xi鈥檃n University of Science and Technology ; 58 Yanta Road ; Xi鈥檃n ; 710054 ; Shaanxi Province ; People鈥檚 Republic of China
  2. Research Institute of Advance Materials Processing Technology ; School of Materials Science and Engineering ; Beijing University of Technology ; Beijing ; 100124 ; People鈥檚 Republic of China
  3. Foundry ; Zibo聽Diesel聽Engine聽Company ; Zibo ; 255077 ; Shandong Province ; People鈥檚 Republic of China
  4. State Key Laboratory for Mechanical Behavior of Materials ; School of Materials Science and Engineering ; Xi鈥檃n Jiaotong University ; Xi鈥檃n ; 710049 ; Shaanxi Province ; People鈥檚 Republic of China
  
• 关键词：boride ; cerium ; impact toughness ; microstructure
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：24
• 期：2
• 页码：626-634
• 全文大小：3,236 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Characterization and Evaluation Materials
  Materials Science
  Tribology, Corrosion and Coatings
  Quality Control, Reliability, Safety and Risk
  Engineering Design
  
• 出版者：Springer New York
• ISSN：1544-1024

文摘

This study investigates the effect of cerium on the microstructures, mechanical properties of medium carbon Fe-B cast alloy. The as-cast microstructure of Fe-B cast alloy consists of the eutectic boride, pearlite, and ferrite. Compared with the coarse eutectic borides in the unmodified alloy, the eutectic boride structures in the modified alloy are greatly refined. Cerium promotes the formation of Ce2O3 phase. Ce2O3 can act as effective heterogeneous nuclei of primary austenite, and refine austenite and boride. After heat treatment, the impact toughness of the modified alloy is higher than that of the unmodified alloy because there are more broken borides in the modified alloy. Meanwhile, the fracture mechanism of medium carbon Fe-B alloy is depicted and analyzed by using fractography.