我厂生产的球墨复合轧辊,从用于轧制码钢的轧辊报废中发现,轧辊不耐用的主要原因是:①先在辊身中间出现环裂,然后发生折断,占轧辊总报废的70%左右;②辊面早期出现裂纹,有时在裂纹交叉处发生米粒状剥落。经分析研究,认为轧制硅钢断辊增多,是原有的轧辊强度未能满足新的条件下使用要求之故。为提高轧辊的强度,特别是轧辊中心部分的强度,改善轧辊的耐磨性和耐热性,减少辊面裂纹,延长使用寿命。我们进行了反复 The ductile iron composite roll produced by our factory is found from the scrapped roll used for rolling yards. The main reasons that the roll is not durable are as follows: firstly, ring cracking occurs in the middle of the roll body and then breaks, accounting for 70% Around; ② early cracks in the roll surface, and sometimes occur at the crack cross-grain peel. According to the analysis and research, it is considered that the broken roller of rolled silicon steel is increased and the original roller strength fails to meet the requirements of the new condition. In order to improve the strength of the roll, especially in the central part of the roll, the wear resistance and the heat resistance of the roll are improved, the crack on the roll surface is reduced, and the service life is prolonged. We repeated