AlSi7Mg轮毂半固态流变挤压铸造成形数值模拟

Numerical Simulation of Semi-solid Rheological Extrusion Casting of AlSi7Mg Wheel Hub

利用半固态流变挤压铸造技术代替传统铸造来生产汽车轮毂。基于有限元软件AnyCasting和carreau表观粘度模型,对铝合金轮毂的半固态流变挤压铸造成形过程进行了数值模拟,研究了压射速度、浇注温度和模具预热温度3个主要工艺参数对半固态浆料充型和凝固过程的影响规律,并采用正交试验设计获取了最佳的工艺参数。结果表明,最佳的工艺参数组合为压射速度0.07 m/s、浇注温度595℃和模具预热温度225℃,同时得出半固态浆料的浇注温度对铸件缺陷的影响最大,压射速度其次,模具预热温度最小。

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.