Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (5): 327-333.DOI: 10.11890/1006-7191-105-327

• 研究论文 • 上一篇    下一篇

稀土Er对过共晶Al-Si合金的组织及性能的影响

邢鹏飞1,高波1,庄艳歆1,刘凯华2,涂赣峰2   

  1. 1. 东北大学
    2.
  • 收稿日期:2010-05-07 修回日期:2010-07-10 出版日期:2010-10-25 发布日期:2010-10-14
  • 通讯作者: 邢鹏飞

On the modification of hypereutectic Al-Si alloys using rare earth Er

Pengfei XING1, Bo GAO1, Yanxin ZHUANG2, Kaihua LIU1,Ganfeng TU1   

  1. 1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
    2. Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, China
  • Received:2010-05-07 Revised:2010-07-10 Online:2010-10-25 Published:2010-10-14
  • Contact: Pengfei XING

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关键词: Rare earth Er, Al-Si alloy, microstructure, modification

Abstract: Hypereutectic Al-17.5Si (wt pct) and Al-25Si (wt pct) alloys with various content of rare earth Er were prepared by conventional casting technique. The effect of Er on the microstructure and properties of the hypereutectic Al-Si alloys was investigated using optical microscopy, scanning electron microscopy as well as friction and wear tests. It was found that optimal amount of Er exists in modifying the hypereutectic Al-Si alloys. An appropriate addition of Er improved the anti-wear properties, and reduced the friction coefficient of the hypereutectic Al-Si alloys studied. The primary silicon crystals in the hypereutectic Al-Si alloys were refined with the suitable addition of Er element. The modification mechanism was also discussed in this paper.

Key words: Rare earth Er, Al-Si alloy, Microstructure, Modification