利用三维造型软件 UG 对 ZM5 合金铸件建立几何模型，在熔模铸造工艺下通过 ProCAST 软件对其在空冷、油冷和水冷条件下分别进行数值模拟，并在空冷条件下进行试验验证。 结果表明，铸件温度分布梯度在水冷介质下分布最广，油冷介质下次之，在空冷介质下最小；在空冷介质下，铸件孤立液相区成椭球状；在油冷和水冷介质下，铸件孤立液相区成针锥状；试验结果与模拟保持一致，验证了模拟的可行性。 该研究可为实际熔模铸造过程中镁合金选取不同冷却介质提供技术支持和工程指导。

The geometric model of ZM5 alloy casting was established by using the three-dimensional modelling software UG. The numerical simulation of ZM5 alloy casting under air-cooled, oil-cooled and water-cooled conditions was carried out by ProCAST software, and the casting was tested under air cooling conditions. The results show that the temperature distribution gradient of the casting is the most widely distributed in the water-cooled medium, followed by the oil-cooled medium, and the smallest in the air-cooled medium. Under the air cooling medium, the isolated liquid phase region of the casting is ellipsoidal; under the oil cooling and water cooling medium, the isolated liquid phase region of the casting is needle cone shaped. The test results are consistent with the simulation, which verifies the feasibility of the simulation. The simulation can provide a reference for the selection of different cooling media for magnesium alloys in the actual casting process.