通过合理的成分设计和适宜的炉前处理，获得了含片状或球状石墨与Ｍ７Ｃ３型碳化物混合的高铬铸铁组织，石墨含量约为３％。热疲劳试验表明，含石墨的高铬铸铁具有比普通高铬铸铁短的裂纹萌生期，但随热循环周次的增加，含石墨高铬铸铁的裂纹发展速率趋于平缓，而普通高铬铸铁易产生裂纹的失稳扩展而形成宏观粗大裂纹。这便使合石墨的高铬铸铁成为一种前景看好的热轧轧辊材料。 Through reasonable composition design and proper pre-treatment, high chromium cast iron with flake or spherical graphite mixed with M7C3 carbide was obtained with graphite content of about 3%. Thermal fatigue tests show that the graphite-containing high-chromium cast iron has a shorter crack initiation period than ordinary high-chromium cast iron. However, with the increase of thermal cycles, the crack growth rate of graphite-containing high-chromium cast iron tends to be gentle, Easy to produce crack instability expansion and the formation of macroscopic coarse cracks. This makes the high graphite chrome cast iron into a promising hot roll material.