东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (4): 541-544+548.DOI: -

• 论著 • 上一篇    下一篇

强磁场对Cu-40%Pb偏晶合金凝固组织的影响

张林;王恩刚;左小伟;赫冀成;   

  1. 东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-04-15 发布日期:2013-06-22
  • 通讯作者: Zhang, L.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50574027);;

Solidification structure of Cu-40%Pb monotectic alloy in high magnetic field

Zhang, Lin (1); Wang, En-Gang (1); Zuo, Xiao-Wei (1); He, Ji-Cheng (1)   

  1. (1) Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-04-15 Published:2013-06-22
  • Contact: Zhang, L.
  • About author:-
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摘要： 在强磁场作用下进行了Cu-40%Pb偏晶合金的凝固实验,研究了偏晶共生组织的凝固形态.实验结果表明:12 T强磁场的作用使富Pb组织形态发生变化,试样中部及下部的棒状相伸长,在试样中部形成了超长规则排列的棒状富Pb相.凝固前沿富Pb小液滴的运动及分布是决定共生组织中棒状相形态的决定性因素.施加强磁场可改变富Pb基体的表观黏度,从而对凝固前沿的富Pb小液滴运动及附近流体流动产生抑制作用,这被认为是规则排列的超长棒状相的形成原因.

关键词: 偏晶合金, 凝固, 强磁场, Cu-Pb, 棒状组织

Abstract: The solidification structure of Cu-40%Pb monotectic alloy was experimentally investigated in a 12 T high magnetic field, including the coexistent monotectic morphology of solidification. The results showed that during the solidification in such a magnetic field the rod-like and regularly arranged extra-long Pb-rich phase forms at the centre of specimen. The high magnetic field enables the Pb-rich phase in solidification structure to have a elongating effect, so the percentage elongation is efficient to analyze the result from the elongation effect. The high magnetic field can also hold back the motion of Pb-rich phase droplets and the melt flow along the solidification front, which is just the reason why the extra-long and regularly arranged monotectic structure forms.

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