东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2013, Vol. 34 ›› Issue (12): 1739-1743.DOI: 10.12068/j.issn.1005-3026.2013.12.016

• 材料与冶金 • 上一篇    下一篇

工艺参数对Al-Zr中间合金中初生Al3Zr相的影响

李飞，朱庆丰，李磊，崔建忠   

  1. (东北大学材料电磁过程研究教育部重点实验室，辽宁沈阳110819)
  • 发布日期:2013-07-09
  • 通讯作者: 李飞
  • 作者简介:李飞(1979-)，男，辽宁沈阳人，东北大学博士研究生;崔建忠(1950-)，男，黑龙江双城人，东北大学教授，博士生导师
  • 基金资助:
    国家重点基础研究发展计划项目(2012CB619506)；国家自然科学基金资助项目(51201029，51204053)；中国博士后科学基金资助项目(2012M520637)

Effects of Process Parameters on Primary Al3Zr Phase in AlZr Master Alloys

LI Fei， ZHU Qingfeng， LI Lei， CUI Jianzhong   

  1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China
  • Published:2013-07-09
  • Contact: CUI Jianzhong
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摘要： 以Al-K2ZrF6为反应体系，采用Al热还原法，研究了不同工艺参数对Al-Zr中间合金凝固过程中初生Al3Zr相的形貌、尺寸、数量及分布状态的影响.结果表明:随着熔体反应温度的增加，Al3Zr晶体的形貌由小块状逐渐长成长条状，尺寸增加，数量减少；当温度低于1000℃，晶体呈现小块状；温度高于1000℃时，晶体呈现长条状；温度为1000℃时，晶体呈现块状和长条状的混合态.与使用铁模相比，采用耐火材料模时，Al3Zr相尺寸增大，数量减小.随着K2ZrF6加入量的增加，Al3Zr相的体积分数增多，尺寸更细小，分布更均匀.

关键词: Al-Zr中间合金, Al-K2ZrF6体系, 初生Al3Zr相, 形貌, 工艺参数

Abstract: The effects of processing parameters on the morphology， size， amount and distribution of the primary Al3Zr phase during the solidification of AlZr master alloys were investigated by the aluminothermic reduction method in the AlK2ZrF6 reaction system. The results showed that the morphologies of the primary Al3Zr crystals transformed from the small blocky shape to long strip shape， and the size of the primary Al3Zr increased while their amount decreased， with the increase of the molten reaction temperature. When the reaction temperature was below 1000℃， Al3Zr crystals exhibited small blocky shapes; when the temperature was higher than 1000℃， they displayed long strip shapes; when temperature was 1000℃， they displayed the small blocky and long strip mixed morphologies. The sizes of the Al3Zr became larger and the amounts of them became fewer in the refractory mold in comparison to that in the iron mold. With the increase of the K2ZrF6 content， the volume fraction of Al3Zr phase increased gradually， and these crystals grew much finer and with more uniform distribution in the Al matrix.

Key words: AlZr master alloy, AlK2ZrF6 system, primary Al3Zr phase, morphology, process parameter

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