武钢冷轧生产技术进步

介绍武钢冷轧厂30年来的发展规模和生产技术进步,阐述二冷轧、三冷轧的先进工艺装备和技术优势,回顾冷轧厂的品种开发和品牌建设历程,展示冷轧厂的现有优势。     

热轧酸洗带钢直接热镀锌工艺探讨

介绍热轧酸洗带钢直接热镀锌生产的背景、工艺特点,对生产中常见的露钢、厚边等缺陷产生原因进行分析并提出解决办法。     

Preset model of bending force for 6-high reversing cold rolling mill based on genetic algorithm

The hydraulic roll-bending device was studied, which was widely used in modern cold rolling mills to regulate the strip flatness. The loaded roll gap crown mathematic model and the strip crown mathematic model of the reversing cold rolling process were established, and the deformation model of roll stack system of the 6-high 1 250 mm high crown (HC) reversing cold rolling mill was built by slit beam method. The simulation results show that, the quadratic component of strip crown decreases nearly linearly with the increase of the work roll bending force, when the shifting value of intermediate roll is determined by the rolling process. From the first pass to the fifth pass of reversing rolling process, the crown controllability of bending force is gradually weakened. Base on analyzing the relationship among the main factors associated with roll-bending force in reversing multi-pass rolling, such as strip width and rolling force, a preset mathematic model of bending force is developed by genetic algorithm. The simulation data demonstrate that the relative deviation of flatness criterions in each rolling pass is improved significantly and the mean relative deviation of all five passes is decreased from 25.1% to 1.7%. The model can keep good shape in multi-pass reversing cold rolling process with the high prediction accuracy and can be used to guide the production process.     

平整过程冷轧带钢表面粗糙度控制技术研究

对采用不同毛化工艺的冷轧带钢表面微观形貌进行了分析,并以3.5μm的电火花毛化辊为研究对象,对其平整轧制过程中辊面和板面粗糙度的衰减曲线进行了试验研究.在大量试验数据和理论分析的基础上,获得了平整轧制过程中带钢粗糙度衰减规律,从而为成品带钢表面粗糙度的控制提供了指导.     

冷轧板形平坦度计算方法

 冷连轧生产线多配备有1套或2套板形仪,用于板形的实时反馈控制以及板形质量的监测,各处所用板形仪的规格不尽相同。板形平坦度指标是表征冷轧带钢板形质量的重要参数,由板形控制系统根据板形仪检测结果自动提供,一般以IU(I-Unit)表示。为了更准确地表征带钢板形质量,分析了某冷轧常用板形控制系统中带钢平坦度的计算方法,并考虑板形仪传感器分布不均会对其平坦度计算结果造成的影响,在此基础上提出了利用线性插值构造间距均匀的横向伸长率分布模型的方法,对平坦度计算过程进行了修正,并以实际板形数据进行检验,结果表明修正后的板形平坦度计算方法不再依赖于板形仪传感器的布置方案,使得具有不同板形仪的冷轧生产线的板形质量更具可比性。     

钢卷卷取助卷器影响酸洗钢生产的故障分析

武钢酸洗轧机联合机组为生产酸洗钢而增加了涂油功能,导致助卷器出现震动、噪声及皮带辊轴承易烧毁等问题。对产生上述问题的原因进行了分析,并提出了相应的解决办法。通过对卷取机扩径瓦的改进、皮带辊子轴承及皮带的改型,使得酸洗钢得以正常生产。