Numerical Simulation of Semi-solid Rheological Extrusion Casting of AlSi7Mg Wheel Hub
Author of the article:LI Daozhong;DING Wuxue;SUN Yu;WAN Shuiping;YE Liu
Author's Workplace：School of Mechanical Engineering Nanjing University of Science and Technology,Nanjing 210094,China;Suzhou Sanji Foundry Equipment Co.,Ltd.,Suzhou 215106,China
Key Words：semi-solid extrusion casting numerical simulation orthogonal test AlSi7Mg wheel hub
Abstract：Semi-solid rheological extrusion casting technology was used instead of conventional casting to produce automobile wheel hubs.Based on the finite element software AnyCasting and carreau apparent viscosity model,the semi-solid rheological extrusion casting process of aluminum alloy hub was numerically simulated.The effects of three main technological parameters of injection velocity,pouring temperature and mould preheating temperature on the filling and solidification process of semi-solid slurry were studied,and the optimum process parameters were obtained by orthogonal design.The results show that the best combination of process parameters,injection speed,pouring temperature and mould preheating temperature are 0.07 m/s,595℃and 225℃respectively,and the pouring temperature of semi-solid slurry has the greatest influence on casting defects,injection speed is the second,mould preheating temperature is the smallest.
