连续退火机组带钢板形翘曲控制

发布时间：2019-03-08 12:47

【摘要】：针对高强度带钢连续退火过程易发多发的板形翘曲问题,根据带钢纵向延伸在厚度方向分布不均导致了翘曲的机理认识建立了带钢翘曲生成力学模型,求解获得带钢上下表面延伸差与翘曲大小的关系及影响规律,并分析指出连退机组平整机单辊驱动是导致带钢产生上下表面延伸差的主要原因。为解决某高强度带钢连退机组存在的板形翘曲问题,建立该机组平整轧制过程有限元仿真模型,模拟分析上下工作辊辊径差、轴线偏心距和摩擦因数差对带钢上下表面延伸差的影响,并提出以减小厚度方向延伸不均为目标的板形翘曲控制的若干对策措施。将所提出的对策措施上机试用并多次优化调整后稳定用于某连退机组的实际生产,使该机组产品带钢的板形翘曲缺陷得到明显改善,创造显著经济效益。
[Abstract]:In order to solve the problem of strip warpage in the continuous annealing process of high strength strip, a mechanical model of strip warpage formation is established according to the mechanism of the uneven distribution of longitudinal extension in the thickness direction of high strength strip, and the mechanical model of strip warpage formation is established. The relationship between the upper and lower surface elongation difference and the warpage size is obtained and the influence law is obtained. It is pointed out that the single roll drive of the continuous annealing mill is the main cause of the upper and lower surface elongation difference of the strip steel. In order to solve the problem of strip warpage existing in a high strength strip mill, the finite element simulation model of flat rolling process is established, and the roll diameter difference between upper and lower work rolls is simulated and analyzed. The influence of axis eccentricity and friction coefficient difference on the upper and lower surface elongation difference of strip steel is studied. Some countermeasures are proposed to control the strip warpage with the aim of reducing the inhomogeneity of thickness direction extension. The proposed countermeasures have been applied to the actual production of a continuous withdrawal unit after trial and many optimized adjustments. The strip shape warping defect of this unit has been obviously improved and remarkable economic benefits have been created.
【作者单位】：宝钢股份有限公司冷轧厂;北京科技大学机械工程学院;
【分类号】：TG335.56;TG157

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