十八辊轧机轧制高强薄规格带钢斜纹浪产生机理与控制技术  

Research on the mechanism and control technology for diagonal wave of high-strength and thin-gauge strip rolled by 18-high mill

作　　者：王少飞 林海海 王春海 丁栗锟 杨志勇 WANG Shaofei;LIN Haihai;WANG Chunhai;DING Likun;YANG Zhiyong(Shougang Jingtang Iron and Steel United Co.,Ltd.,Tangshan 063200,China;Technology Research Institute of Shougang Group Co.,Ltd.,Beijing 100041,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司冷轧部,河北唐山063200 [2]首钢集团有限公司技术研究院,北京100041

出　　处：《轧钢》2025年第1期78-85,共8页Steel Rolling

摘　　要：十八辊单机架轧机在轧制高强薄规格带钢时极易出现斜纹浪缺陷,分析认为斜纹浪产生的机理为带钢存在一定的切应力和不均匀的张应力,使带钢在轧制过程中产生不均匀塑性变形而导致。为解决斜纹浪板形问题,运用有限元ABAQUS软件建立了十八辊轧机轧制过程三维弹塑性仿真模型,分析了中间辊弯辊、轴向横移等手段的板形调控能力。结果表明:随着带钢宽度的增加,十八辊轧机中间辊弯辊、轴向横移对承载辊缝二次凸度、四次凸度调控功效逐渐增大,中间辊轴向横移调控功效要优于常规冷连轧机,而中间辊弯辊调控功效较常规冷连轧机要弱,十八辊轧机对承载辊缝四次凸度的调节能力明显高于常规冷连轧机,但对二次凸度的调节能力要弱于常规冷连轧机;当带钢发生跑偏时,轧机两侧出现轧制力偏差,且带钢跑偏量对十八辊轧机两侧轧制力差值的影响大于常规冷轧机。因此,相对于常规冷连轧,十八辊单机架轧机更容易产生斜纹浪板形缺陷。针对十八辊轧机生产带钢斜纹浪问题,提出减少末道次轧制力F(F<5MN),提高末道次前、后张力(提高30%)的措施,实现了斜纹浪缺陷的有效控制。The 18-high single-stand mill is prone to produce diagonal wave defects when rolling high-strength and thin gauge strip.Analysis indicates that the mechanism behind the generation of diagonal waves is the existence of certain shear stress and uneven tensile stress in the strip,leading to uneven plastic deformation during rolling.To resolve the problem of diagonal wave shape defects,a three-dimensional elastoplastic simulation model of the rolling process of the 18-high mill was established using the finite element software ABAQUS.The shape control capabilities of intermediate roll bending and axial shifting were analyzed.The results show that as the strip width increases,the regulation effectiveness of intermediate roll bending and axial shifting on the secondary and quaternary crown of the loaded roll gap gradually increases in the 18-high mill.The regulation effectiveness of intermediate roll axial shifting is superior to that of conventional tandem cold rolling mills,while the regulation effectiveness of intermediate roll bending is weaker.The 18-high mill exhibits significantly higher adjustment capability for the quaternary crown of the loaded roll gap compared to conventional tandem cold rolling mills,but its adjustment capability for the secondary crown is weaker.When the strip deviates from the centerline during rolling,a rolling force deviation occurs on both sides of the mill,and the influence of strip deviation on the rolling force difference between the two sides of the 18-high mill is greater than that of conventional cold rolling mills.Therefore,compared to conventional tandem cold rolling,the 18-high single-stand mill is more prone to diagonal wave shape defects.To resolve the diagonal wave problem of strip produced by the 18-high mill,measures such as reducing the final pass rolling force(F<5000kN)and increasing the forward and backward tension of the final pass(by 30%)were proposed,the diagonal wave defects was effectively controlled.

关 键 词：十八辊轧机 高强钢 薄规格 斜纹浪 有限元 承载辊缝 凸度 板形调控 

分 类 号：TG3[金属学及工艺—金属压力加工]