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。
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.
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。
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.
对铸型冷却速度、浇注温度、球化率和化学成分对辊身硬度的影响进行了论述，并提出了解决问题的措施。
The influences of cooling rate of the mould, pouring temperature, nodularity and chemical composition on hardness of roll body were described, and the measures for solve problems were proposed.
另外，研究了消失模铸造法铸型表面硬度、界面换热系数的变化规律。
Moreover, the variation law of mold surface hardness and interface heat transfer coefficient were studied.
结果表明：此工艺方法生产的铸型，其强度、硬度远高于一般铸型，适合于生产尺寸精度高的铸件。
The results show that the strength and hardness of the mold produced by this method are much higher than those of normal sand mold, suitable for producing high precision thin wall castings.
结果表明：此工艺方法生产的铸型，其强度、硬度远高于一般铸型，适合于生产尺寸精度高的铸件。
The results show that the strength and hardness of the mold produced by this method are much higher than those of normal sand mold, suitable for producing high precision thin wall castings.
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