The mold hardness under different vacuum degree was tested.The results showed that the mold hardness of EPC process was higher than that of green sand mold and was more uniformly distributed.

• 不同真空度下消失模铸型硬度的测试结果表明，消失模铸型的硬度高于普通湿型砂铸型，并且硬度分布更均匀。