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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.

According to the problem of strip warp defects widely existing in continuous annealing production,the mechanical model of strip warp was established based on the mechanism that the warp was caused by the inhomogeneity of strip longitudinal elongation in the thickness direction to obtain the relationship of the difference between the upper and lower surface elongation to warping size.And it was pointed out that it was the single-roll drive of temper mill that caused the difference between the upper and lower surface elongating.In order to solve the problems of strip warp during the continuous annealing production,the finite element model(FEM) of continuous annealing and temper rolling process was established.Influences of roller diameter difference,axis eccentricity and friction coefficient on difference of surface extension was simulated.On this basis,the countermeasures aiming to control the strip warp by decreasing the inhomogeneity of the elongation in thickness direction were proposed.After repeatedly optimized and adjusted in continuous annealing line,the countermeasures were applied in the actual production, which can significantly improve the strip warp defects and create remarkable economic efficiency.