带钢板形翘曲变形行为的仿真

针对带钢平整轧制过程中常见的板形翘曲缺陷(C翘、L翘和四角翘)的产生机理与变形规律,应用ANSYS有限元软件,分别建立了带钢的在线有张力翘曲变形模型和离线无张力翘曲变形模型,对两种状态下带钢翘曲变形的力学机理和各因素的影响机制与规律进行了仿真分析.研究认为,板形翘曲缺陷是平整轧制过程中带钢的塑性变形(主要是纵向延伸)沿厚度方向上的分布不均匀引起,而与纵向延伸沿宽度方向上的分布无关.在仿真计算结果的指导下,对某厂连退机组平整后带钢的严重板形C翘问题进行了研究,改进工艺后取得了显著效果.

Simulation of warping deformation in thin steel strips

In order to study the generation mechanism and deformation law of warping(cross bowing,lengthwise bowing and twisting) in thin steel strips during temper rolling,strip warping models with tension on-line and without tension off-line were established using ANSYS software.The mechanical mechanism of warping deformation under the two states and the influence mechanism and law of factors were analyzed.According to the analysis results,it is indicated that the warping deformation is caused by the uneven distribution of plastic deformation(mainly vertical extension) along the thickness direction during temper rolling,not the uneven distribution in width.Under the guidance of simulation data,serious cross bowing after temper rolling in a continuous annealing process line was investigated,and a good result was gotten after improving the rolling process.