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陈淑英,马胜男,岳旭东,李青春,常国威.Cu-P合金变质过共晶铝硅合金时熔体搅拌工艺对变质效果的影响[J].稀有金属材料与工程(英文),2019,47(3):1008~1014.[Chen Shuying,Ma shengnan,Yue Xudong,Qingchun Li and Chang Guowei.Influences of Melt Stirring Treatment on Modification effect of Hypereutectic Al-Si Alloys Modified by Cu-P Alloy[J].Rare Metal Materials and Engineering,2019,47(3):1008~1014.]
Influences of Melt Stirring Treatment on Modification effect of Hypereutectic Al-Si Alloys Modified by Cu-P Alloy
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Received:August 21, 2017  Revised:September 27, 2017
DOI:
Key words: hypereutectic Al-Si alloy  P modification  melt stirring  primary Si  AlP
Foundation item:国家自然科学基金面上项目(51674138)
Author NameAffiliation
Chen Shuying,Ma shengnan,Yue Xudong,Qingchun Li and Chang Guowei  
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Abstract:
      The primary silicon is still rough in hypereuctic Al-Si alloys with the P modification. Aimed at this, the melt stirring is proceeded after the Al-15%Si, Al-18%Si and Al-20%Si alloys were modified by the Cu-9%P alloy, and the influences of the stirring parameters on the modification effect were studied. The mechanism that the melt stirring can improve the modification effect was analyzed. The results show that the melt stirring can obviously enhance the modification effect of hypereuctic Al-Si alloys modified the Cu-P alloy, and the primary silicon can refine the maximum 85%. Within the optimum stirring time, the stronger the stirring is and the higher the silicon content is, the better the modification effect is. The melt stirring compel the AlP in the region of rich P to stop the growth. The faster the velocity of the melt flow is, the stronger the scour of AlP in rich P region is. The easier it is to obtain the fine AlP. The melt stirring can also increase the quantity of the primary α in the microstructure. The typical eutectic structure basically disappears if the stirring parameters are suitable. The microstructure of the tiny primary silicon evenly distributed in the continuous α matrix is obtained.