Investigation of rheo-diecasting mold filling of semi-solid A380 aluminum alloy slurry  

作　　者：Zhi-yong Liu Wei-min Mao Wei-pan Wang Zhi-kai Zheng Rui Yue 

机构地区：[1]School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China [2]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [3]Beijing Nanshan Institute of Aeronautical Materials, Beijing 100048, China [4]National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2017年第6期691-700,共10页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Basic Research Program of China (No. 2011CB606300);the National Natural Science Foundation of China (No. 5077400)

摘　　要：The rheo-diecasting mold filling capacity and the microstructure of the semi-solid A380 aluminum alloy slurry were investigated. The results show that the mold filling capacity was strengthened with increasing pouring temperature or increasing injection pressure. Under certain process parameters, the mold cavity was fully filled. However, the mold filling capacity decreased with increasing holding time. The mold filling capacity was improved with increasing shape factor of primary α(Al) grains; however, the solid fraction and the grain size significantly increased at the same time. In addition, the microstructures along the route of the spiral samples obviously differed. The grain size decreased gradually from the near-end to the far-end, whereas the shape factor increased gradually.The rheo-diecasting mold filling capacity and the microstructure of the semi-solid A380 aluminum alloy slurry were investigated. The results show that the mold filling capacity was strengthened with increasing pouring temperature or increasing injection pressure. Under certain process parameters, the mold cavity was fully filled. However, the mold filling capacity decreased with increasing holding time. The mold filling capacity was improved with increasing shape factor of primary α(Al) grains; however, the solid fraction and the grain size significantly increased at the same time. In addition, the microstructures along the route of the spiral samples obviously differed. The grain size decreased gradually from the near-end to the far-end, whereas the shape factor increased gradually.

关 键 词：aluminum alloys SEMI-SOLID SLURRY RHEO-DIECASTING MOLD FILLING microstructure 

分 类 号：TG249.2[金属学及工艺—铸造]