伟大领袖毛主席教导我们:“研究任何过程,如果是存在着两个以上矛盾的复杂过程的话,就要用全力找出它的主要矛盾。捉住了这个主要矛盾,一切问题就迎刃而解了。”我们在调查φ630毫米冷硬复合球墨铸铁轧辊质量时,对断辊进行了大量的取样分析,力求找出影响轧辊质量的主要矛盾。化学分析和金相分析的结果表明:轧辊使用寿命随辊心 Chairman Mao, the great leader, taught us: "If we look into any process, and if there are complicated processes of more than two contradictions, we shall try our best to find out its major contradictions and seize this major contradiction so that all problems will be solved. When we investigated the quality of the φ630mm chilled composite ductile iron roll, we conducted a lot of sample analysis on the broken roll and tried to find the main contradiction that affected the roll quality. Chemical analysis and metallographic analysis of the results show that: roll life with roller heart