In this study a gating system including sprue, runner and overflows for semi-solid rheocasting of aluminum alloy was designed by means of numerical simulations with a commercial software. The effects of pouring temperature, mold temperature and injection speed on the filling process performance of semi-solid die casting were studied. Based on orthogonal test analysis, the optimal die casting process parameters were selected, which were metal pouring temperature 590 °C, mold temperature 260 °C and injection velocity 0.5 m/s. Semi-solid slurry preparation process of Swirled Enthalpy Equilibration Device (SEED) was used for die casting production experiment. Aluminum alloy semi-solid bracket components were successfully produced with the key die casting process parameters selected, which was consistent with the simulation result. The design of semi-solid gating system was further verified by observing and analyzing the microstructure of different zones of the casting. The characteristic parameters, particle size and shape factor of microstructure of the produced semi-solid casting showed that the semi-solid aluminum alloy components are of good quality.

在这项研究中，通过使用商业软件进行数值模拟，设计了一种用于铝合金半固态流变铸造的浇口、流道和溢流口系统。研究了浇注温度、模具温度和注射速度对半固态压铸件充型过程性能的影响。基于正交试验分析，选择了最佳压铸工艺参数，金属浇注温度590℃，模具温度260℃，注射速度0.5m/s。采用涡流焓平衡装置（SEED）的半固态浆料制备工艺进行压铸生产实验。选用关键压铸工艺参数成功生产出铝合金半固态支架组件，与仿真结果一致。通过观察和分析铸件不同区域的显微组织，进一步验证了半固态浇注系统的设计。生产的半固态铸件的特征参数、粒度和显微组织形状因子表明半固态铝合金部件质量良好。