深冲钢热轧猫耳形板廓缺陷成因分析与控制  

Cause analysis and control of cat ears strip profile defects of deep drawing steel during hot rolling

作　　者：董强 曹建国[2] 何毅 文雄 孙丽荣 李朝阳 DONG Qiang;CAO Jianguo;HE Yi;WEN Xiong;SUN Lirong;LI Zhaoyang(Post-Doctoral Research Center,Shandong Iron and Steel Group Co.,Ltd.,Jinan 271104,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Mechanical Engineering,Shandong Jiaotong University,Jinan 250357,China;Rizhao Co.,Ltd.,Shandong Iron and Steel Group,Rizhao 276800,China)

机构地区：[1]山东钢铁股份有限公司博士后科研工作站,山东济南271104 [2]北京科技大学机械工程学院,北京100083 [3]山东交通学院工程机械学院,山东济南250357 [4]山东钢铁集团日照有限公司,山东日照276800

出　　处：《轧钢》2023年第3期28-32,共5页Steel Rolling

基　　金：山东省自然科学基金项目(ZR2020ME107);中国科协青年人才托举工程项目;山东钢铁股份有限公司博士后科研工作站项目。

摘　　要：针对某产线深冲钢热轧出现大量猫耳形板廓缺陷的问题,对精轧机组工作辊磨损及其热凸度、比例凸度分配、带钢横向温度分布、轧制过程相变等板形影响因素进行了测试分析。结果表明:各机架比例凸度设定不合理,带钢横向温度分布不均匀,精轧下游末机架带钢发生相变等因素的共同作用,是造成深冲钢热轧猫耳形板廓缺陷的主要原因。通过将系统中精轧入口设定凸度调整为厚度的1.5%,将出口目标凸度设置为40~120μm,并采用保证加热炉板坯保温时间,开启辊道保温罩,超宽带钢采用边部加热器,改善机架间冷却及将终轧温度提高10℃的措施,基本消除了深冲钢热轧猫耳形板廓缺陷。In view of appearing numerous cat ears strip profile defects of the deep drawing steel during hot rolling of a production line,the influence factors on strip shape were measured and analyzed,such as work roll wear and thermal crown,proportional crown allocation,transverse temperature distribution of strip and phase transformation during hot rolling.The results show that the main causes of cat ears strip profile defects of deep drawing steelduring hot rolling are the unreasonable setting of proportional crown of each stand,the uneven transverse temperature distribution of the strip and the phase transformation of strip at the finishing stand.Therefore,several measures were put forward,such as setting strip crowns at the inlet of finishing millto 1.5%thickness of the slab,setting the target crown at the outlet to 40-120μm,ensuring the reservation time of slab in furnace,applying roller cover in front of the finishing mill,using edge heater for the ultra wide strip,improving the cooling between finishing stands and increasing the finishing rolling temperature by 10℃.Based on these measures,the cat ears strip profile defects of deep drawing steel during hot rolling have been notably eliminated.

关 键 词：深冲钢 热轧带钢 板形 猫耳形板廓缺陷 横向温度分布 相变 

分 类 号：TG333[金属学及工艺—金属压力加工]