The ideal of the design and finalized programme of the type-D green mold hardness tester are expounded by the theory and the experiments.
本文从理论和实践的两个角度，论述了D型湿砂型表面硬度计的设计思想，定型设计方案。
Influence of the initial temperature fields and mold hardness on the shrinkage defect of ductile iron casting by EPC process was mainly investigated in this paper.
本文主要讨论了初始温度场和铸型硬度对消失模铸造球墨铸铁件收缩缺陷的影响。
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。
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