采用数值模拟仿真技术,对实际压铸件充型过程气体卷入进行了数值模拟,预测了压铸件中孔洞的形成位置。通过对实际压铸件局部剖面及其在光学显微镜下微观组织的观察,对模拟结果进行了验证。结果表明,孔洞的产生不仅与气体卷入密切相关,而且与凝固过程浇道的早期凝固及压力传递有关。 Using numerical simulation technology, the actual gas-filled process of die-casting process was numerically simulated, and the formation position of holes in die casting was predicted. The simulation results were verified by the observation of the actual cross-section of die-casting and its microstructure under optical microscope. The results show that the cavities are not only closely related to the gas entrainment, but also to the early solidification and pressure transfer of the runner in the solidification process.