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为了降低冷轧带钢的横向同板差,通常需要采用紧边轧制工艺,带钢边部处于大拉伸应力状态,很容易引起边裂或断带。提出一种冷轧带钢来料横断面形状的简单描述方法,以热轧来料横断面参数作为输入参数,采用板形模拟软件分析了来料断面形状的两个关键参数对带钢出口张应力与出口断面形状的影响规律。模拟结果表明,减小热轧来料边部15和40mm处凸度值C_(15)和C_(40),改善热轧带钢边部减薄,不仅有利于减小冷轧带钢横向同板差,而且可以改善带钢边部残余拉应力,从而减小冷轧带钢边部张应力,有利于避免第一道次带钢发生边裂与断带事故。
In order to reduce the horizontal plate of cold-rolled strip with the plate, usually require the use of tight-edge rolling process, the edge of the strip in a state of large tensile stress, it is easy to cause edge cracking or broken belt. A simple method for describing the cross-sectional shape of incoming cold-rolled strip was proposed. The cross-sectional parameters of hot-rolled strip were taken as input parameters. The plate shape simulation software was used to analyze the influence of two key parameters Influence of stress and outlet cross section shape. The simulation results show that reducing the crown values C 15 and C 40 at the 15 and 40 mm edges of the hot rolled material and improving the edge thinning of the hot rolled strip are not only helpful to reduce the transverse co-rotation of the cold rolled strip Plate difference, but also can improve the residual tensile stress on the edge of the strip, thereby reducing the tensile stress on the edge of the cold-rolled strip, which is beneficial to avoid the edge break and belt break in the first pass.