冷轧高强钢头尾厚度波动原因分析及优化  

Analysis and optimization of head and tail thickness fluctuation of cold rolled high-strength steel strip

作　　者：陈飞 蒋自武 李旭东 焦会立[2] 孙力娟 李振 CHEN Fei;JIANG Ziwu;LI Xudong;JIAO Huili;SUN Lijuan;LI Zhen(Technology Institute of Shougang Group Co.,Ltd.,Beijing 100043,China;Beijing Shougang Co.,Ltd.,Beijing 100041,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]北京首钢股份有限公司,北京100041

出　　处：《轧钢》2024年第3期127-132,共6页Steel Rolling

摘　　要：针对某厂DP590冷硬卷带头、带尾高频厚度波动的问题,对其产生原因进行了研究。结果表明:热轧卷沿轧向性能不均是引发冷轧过程工艺失稳及冷硬卷厚度波动的重要原因,而热轧卷卷取前空冷阶段由于带钢存在中浪缺陷和残留冷却水是影响其轧向性能均匀性的根本原因。为此,提出了控制带钢板形、提高层冷系统吹扫能力、采用U形冷却等工艺优化措施,保证空冷阶段带钢沿轧向的均匀冷却条件,显著提高了冷轧过程厚度控制的稳定性,冷硬卷厚度超差长度从41 m大幅降至10 m以内,一检封闭率由31.8%降至1.6%,有效解决了冷硬卷带钢头尾厚度波动问题,提高了成材率。In view of the high-frequency thickness fluctuations at the head and tail of DP590 cold rolled coils in a factory,the causes were researched.The results indicate that the uneven property of the hot rolled coils along the longitudinal direction is a significant factor leading to process instability during cold rolling and thickness fluctuations of cold rolled coils.The fundamental reason for the uneven longitudinal property lies in the existence of mid-wave defects and residual cooling water during the pre-air cooling stage of hot rolled strip coiling.Therefore,it is proposed to control the shape of the strip,enhance the blow-off capability of the laminar cooling system,and adopt U-shaped cooling and other process optimization measures to ensure uniform cooling conditions along the longitudinal direction of the strip during the air cooling stage.The stability of thickness control during the cold rolling process can be significantly improved.The excessive thickness length of the cold rolled coils has been reduced from 41 meters to within 10 meters,and the first inspection failure rate has decreased from 31.8%to 1.6%.This effectively resolves the problem of thickness fluctuations at the head and tail of cold rolled coils,thereby improving the yield rate.

关 键 词：冷轧 高强钢 厚度波动 热轧钢卷 性能均匀性 成材率 

分 类 号：TG335.12[金属学及工艺—金属压力加工]