前言自从进入伟大的七十年代以来,我厂广大职工在毛主席关于“中国应当对于人类有较大的贡献”的伟大号召指引下,高举“鞍钢宪法”的旗帜,运用毛主席光辉哲学思想,经过反复实践,攻克了球墨铸铁大轧辊试制过程的一道道难关,使轧辊综合机械性能取得了较大的提高,不但超过了历史上最高水平,而且赶上了进口的日本球墨铸铁初轧辊(见表1)。通过这一阶段实践,我们深深地认识到轧辊大截面内部质量较差是影响机械性能进一步提高的主要矛盾,在这个问题上,对我们仍然 Foreword Since entering the great seventies, under the great call of Chairman Mao on “China should make greater contribution to mankind,” our factory workers hold the banner of “Ansteel Constitution” and use Chairman Mao’s brilliant philosophy, After repeated practice, the difficult process of trial production of large ductile iron was solved and the overall mechanical performance of the roll was greatly improved. It not only surpassed the highest level in history, but also caught up with the imported Japanese ductile iron primary roll (see Table 1). Through this stage of practice, we deeply recognize that the poor internal quality of the large cross-section of the roll is the main contradiction of the mechanical properties to further improve, on this issue, we still