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论述了铸铁件在高温状态下的失效机制，它不仅取决于材质的耐热性，还与缩松等铸造缺陷有关。用Ｘ射线探伤证实，耐热球墨可锻铸铁的缩松倾向较中硅耐热球铁有明显改善，是一种抗渗漏性能优良的新型耐热铸铁
The failure mechanism of cast iron at high temperature is discussed. It depends not only on the heat resistance of the material, but also on casting defects such as shrinkage. X-ray inspection confirmed that the heat-resistant ductile malleable iron shrinkage tendencies than the heat-resistant ductile iron has been significantly improved, is a good anti-leakage performance of the new heat-resistant cast iron