| 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,2019,47(3):1008~1014.[Chen Shuying,Ma shengnan,Yue Xudong,Qingchun Li,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.] |
| 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 |
| 投稿时间：2017-08-21 修订日期：2017-09-27 |
| 中文关键词: 过共晶Al-Si合金 P变质 熔体搅拌 初生硅 AlP |
| 基金项目:国家自然科学基金面上项目(51674138) |
| 中文摘要: |
| 针对过共晶铝硅合金经过P变质后初生硅仍然粗大的问题,采用Cu-9%P合金变质处理Al-15%Si、Al-18%Si、Al-20%Si合金,变质处理后对熔体进行搅拌,研究了搅拌工艺对变质处理效果的影响,分析了熔体搅拌提高变质效果机理。结果表明,Cu-P合金变质过共晶铝硅合金时,对熔体进行搅拌可显著提高变质效果,初生硅最高可细化85%；在最佳搅拌时间内,搅拌强度越大、硅含量越高,变质效果越好；搅拌熔体迫使富P区域内AlP停止生长,熔体流动速度越快,对富P区域内AlP的冲刷越强烈,越容易得到细小的AlP；搅拌熔体能够增加组织中初生α相的数量,搅拌工艺合适时,典型的共晶组织基本消失,可获得连续的α基体上均匀分布细小初生硅的凝固组织。 |
| Influences of Melt Stirring Treatment on Modification effect of Hypereutectic Al-Si Alloys Modified by Cu-P Alloy |
| 英文关键词:hypereutectic Al-Si alloy P modification melt stirring primary Si AlP |
| 英文摘要: |
| 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. |
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