【摘要】 为研究真空密封铸型在压力下的强度、硬度，设计制造了压力罐，并测试了压力罐内压力为１、２、３、４个大气压时真空密封铸型的抗压、抗剪、抗拉强度及压力为１、２、３、４、５、６、７个大气压时铸型的硬度。结果表明，ＰＶ法铸造的铸型强度、硬度远高于普通Ｖ法铸型和一般砂型，有利于生产尺寸精度较高的铸件。更多还原

【Abstract】 To research the strength and hardness of vacuum sealed mold under pressure, a pressure tank has been designed and made. The compressive strength, shear strength and tensile strength of vacuum sealed mold in the tank under the pressure 1 to 4 atms and the hardness of the mold in the tank under the pressure 1 to 7 atms have been measured. The results show that the strength and hardness of the mold under pressure are much higher than those of Vprocess mold and normal sand mold, which is of great advantage for producing high precision castings.更多还原