(華南理工大學(xué) 國(guó)家金屬材料近凈成形工程技術(shù)研究中心，廣州 510640)
摘 要: 采用攪拌鑄造法制備A356/10%SiCp(100 μm)垂直向上吸鑄件，采用顯微數(shù)字圖像分析系統(tǒng)定量分析鑄件不同位置SiC顆粒的含量。基于歐拉?拉格朗日方法，建立顆粒增強(qiáng)鋁基復(fù)合材料充型過(guò)程的數(shù)學(xué)模型，完成了實(shí)驗(yàn)鑄件復(fù)合材料流動(dòng)與SiC顆粒分布的模擬。對(duì)模擬和實(shí)驗(yàn)結(jié)果進(jìn)行比較和驗(yàn)證分析。結(jié)果表明，在充型開始部位型壁附近出現(xiàn)SiC顆粒富集層；隨著充型距離的增加，SiC顆粒向鑄件型腔中心運(yùn)動(dòng)，在鑄件前端中心部位SiC顆粒含量稍高；沿充型方向，鑄件中SiC顆粒含量降低。
關(guān)鍵字: A356/SiCp；充型過(guò)程；顆粒分布；數(shù)值模擬
（National Engineering Research Centre of Metallic Materials Near-Net-Shape Forming for Metallic Mateirals,
South China University of Technology, Guangzhou 510640, China）
Abstract:An A356/10%SiCp(100 μm) upward suction casting was conducted with stirring casting technique. The SiCp contents of different sections in the casting were quantitatively measured with micro digital image analysis system. Based on the Eulerian?Lagrangian method, a model for the particle reinforced-composite casting mold filling was presented. It was applied to the composite liquid flow and SiC particulate distribution in the experimental casting. The simulation results were compared and validated with the experimental ones. The results show that the SiC particulates are prone to be aggregated near the mold wall at the casting filling beginning part; they move towards the centre as the filling distance increases, resulting in slightly higher content of SiC particulate within the centre part in the casting front; the SiC particulate contents decrease along the upward mold filling direction.
Key words: A356/SiCp; mold filling; particulate distribution; numerical simulation
