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含Ｃｒ、Ｓｉ各４～５％的耐热球墨可锻铸铁是一种缩松倾向小、抗渗漏性能良好的新型耐％热铸铁。着重研究了其耐热性（主要是抗氧化性），初步分析了它的氧化膜成分与结构。最后得出：在９５０℃条件下，其抗氧化性较中硅耐热球铁高出一个数量级。
The heat-resistant ductile malleable cast iron containing 4 to 5% of Cr and Si each is a new type of hot-resistant hot-cast iron with small shrinkage tendency and excellent anti-seepage performance. Focus on its heat resistance (mainly anti-oxidation), preliminary analysis of its oxide film composition and structure. The results show that under 950 ℃, its oxidation resistance is an order of magnitude higher than that of heat-resistant ductile iron.