【摘要】 采用数值模拟的方法，研究了镁合金压铸件充型凝固过程。基于正交试验设计，分析了浇注温度、模具温度、压射速度和保压时间等工艺参数对缩松、缩孔、热裂倾向指数的影响。结合模拟结果，获得了最佳的压铸工艺参数：浇注温度为690℃，压射速度为8 m/s，模具温度为240℃，保压时间为7 s。优化后的工艺参数减少了铸件的缩松、缩孔和热裂倾向指数，用该工艺参数进行压铸生产，获得了质量良好的镁合金压铸件，并对缺陷位置及微观组织进行了验证。更多还原

【Abstract】 In this paper, the filling and solidification process of magnesium alloy die casting was numerically simulated.Based on orthogonal experimental design, the effects of pouring temperature, mold temperature, injection speed and holding time on shrinkage porosity, hot tearing tendency were studied. Combined with the simulation results, the best die casting process parameters was obtained: 690 ℃ pouring temperature, 8m/s injection speed, 240 ℃ mold temperature and 7 s holding time. The optimized die casting process parameters reduced the shrinkage porosity and hot tearing tendency on the die casting. Good quality magnesium alloy die casting was obtained by using process parameters, and the defect location and microstructure were verified.更多还原