Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (6): 408-414.DOI: 10.1016/S1006-7191(08)60116-7

• 研究论文 • 上一篇    下一篇

ANNULAR ELECTROMAGNETIC STIRRING——A NEW METHOD FOR THE PRODUCTION OF SEMI-SOLID A357 ALUMINUM ALLOY SLURRY

朱光磊1;徐骏2;张志峰3;白月龙4;石力开5   

  1. 1. 北京有色金属研究总院国家有色金属复合材料工程技术研究中心
    2. 北京有色金属研究院
    3. 北京有色金属研究总院
    4. 北京科技大学铸造研究所
    5.
  • 收稿日期:2009-01-04 修回日期:2009-03-14 出版日期:2009-12-25 发布日期:2009-12-16
  • 通讯作者: 朱光磊
  • 基金资助:

    国家高技术研究发展计划;国家重点基础研究发展计划

Annular electromagnetic stirring-a new method for the production of semi-solid A357 aluminum alloy slurry

Guanglei ZHU, Jun XU, Zhifeng ZHANG, Yuelong BAI, Likai SHI   

  1. National Engineering & Technology Research Center for Non-ferrous Metal Matrix Composites, General Research Institute for Non-ferrous Metals, Beijing 100088, China
  • Received:2009-01-04 Revised:2009-03-14 Online:2009-12-25 Published:2009-12-16
  • Contact: Guanglei ZHU

PDF (PC)

1655

摘要：

A new method for producing semisolid slurry, Annular Electromagnetic Stirring (A-EMS), to refine and spheroidize grains was exploited. Experimental work was undertaken to investigate the effects of cooling rate, stirring power and stirring time on the solidification behavior of A357 alloy using A-EMS. It was found that increasing the cooling rate and stirring power gave rise to substantial grain refinement, which could be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and composition fields in the bulk liquid during the initial stage of solidification. Results showed that a fully grain refined spherical structure could be obtained using proper processing conditions within 10s.

关键词: Semisolid, Annular Electromagnetic Stirring, A357

Abstract:

A new method for producing semisolid slurry, annular electromagnetic stirring (A-EMS), to refine and spheroidize grains was exploited. Experimental work was undertaken to investigate the effects of cooling rate, stirring power and stirring time on the solidification behavior of A357 alloy using A-EMS. It was found that increasing the cooling rate and stirring power gave rise to substantial grain refinement, which could be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and composition fields in the bulk liquid during the initial stage of solidification. Results showed that a fully grain refined spherical structure could be obtained using proper processing conditions within 10s.

Key words: Semisolid, Annular electromagnetic stirring, A357