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在真空密封造型工艺（V法）的基础上，提出压力下真空密封造型铸造工艺（P－V法），并对P－V法中铸型抗压强度、抗剪强度、抗拉强度、硬度、薄膜烧失、浇注时型腔压力、金属液充型流动等工艺参数进行系统的基础研究．
On the basis of the vacuum sealing process (V method), the vacuum sealing molding casting process (P-V method) under pressure was put forward. The compressive strength, shear strength, tensile strength, hardness , Film loss, cavity pressure during pouring, liquid metal filling flow and other process parameters for systematic basic research.