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首页> 中文期刊> 《中国铸造》 >Separation of primary Si and impurity boron removal from Al-30Si-10Sn melt under a traveling magnetic field

Separation of primary Si and impurity boron removal from Al-30Si-10Sn melt under a traveling magnetic field

         
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摘要

Separation of primary Si phase and removal of boron in the primary Si phase during the solidification process of the Al-30%Si-10%Sn melt under a traveling magnetic field（TMF） were investigated. The results showed that the agglomeration layer of the primary Si can be formed in the periphery of the ingot while the inner microstructures mainly consist of the eutectic α-Al+Si and β-Sn phases. The intense melt flow carries the bulk liquid with higher Si content to promote the growth of the primary Si phase which is first precipitated close to the inner wall of crucible with a relatively lower temperature, resulting in the remarkable segregation of the primary Si phase. The content of impurity B in the primary Si phase can be removed effectively with an increase in magnetic flux intensity. The results of electron probe microanalysis（EPMA） clearly indicated that the average intensity of the B Ka line in the α-Al phase region of Al-Si-Sn alloy is higher in the case of solidification under TMF than that of normal solidification condition, suggesting that the electromagnetic stirring can promote the B removal from the primary Si phase.

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  • 来源
    《中国铸造》 |2016年第4期|284-288|共5页
  • 作者

    Jin-ling Sun; Qing-chuan Zou; Jin-chuan Jie; Ting-ju Li;

  • 作者单位

    1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province);

    School of Materials Science and Engineering;

    Dalian University of Technology 2. Laboratory of Special Processing of Raw Materials;

    Dalian University of Te;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TG146.21;
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