The shape of cross-sectional profile is the most important characteristic of the quality of hot rolled steel, because it is accurately reproduced after subsequent cold rolling and thereby has a significant effect on the flatness of cold rolled strips. Traditional method to evaluating the accuracy of cross-sectional profile by geometric dimensions is the least squares approximation of hot-rolled strip thickness by second order polynomial. A number of parameters that characterize the macro-features of hot-rolled strips’ profile are found from the obtained second order parabola coefficients; this is wedge, convexity, displacement, coefficient of determination and the recently introduced saddle-shape coefficient, showing the presence of edge thickenings. Edge thickenings are formed due to wear of the work rolls in the areas corresponding to the edges of the rolled strips. An analysis of the existing geometrical parameters of the cross-sectional profile of the hot-rolled strips showed that with their help in some cases it is practically impossible to predict the flatness of cold-rolled strips. Analysis of the flatness of cold-rolled strips has identified four specific classes of cross-sectional profiles of hot rolled strips that have a significant effect on the shape of cold-rolled strips, and three of them negatively affect the flatness of cold rolled strips. Profiles with a concave middle and (or) near-edge areas lead to waviness, pike-shaped profiles cause warping.

截面轮廓的形状是热轧钢质量最重要的特征，因为它在随后的冷轧后精确再现，从而对冷轧带钢的平整度有显着影响。传统的用几何尺寸评价断面轮廓精度的方法是用二阶多项式对热轧带钢厚度进行最小二乘逼近。从得到的二阶抛物线系数中发现了一些表征热轧带钢宏观特征的参数；这是楔形、凸度、位移、决定系数和最近引入的鞍形系数，表明存在边缘增厚。由于在对应于轧制带材边缘的区域中工作辊的磨损而形成边缘增厚。对热轧带材横截面轮廓的现有几何参数的分析表明，在某些情况下，在它们的帮助下，实际上不可能预测冷轧带材的平整度。对冷轧带钢平直度的分析确定了四种特定类别的热轧带钢横截面轮廓，它们对冷轧带钢的形状有显着影响，其中三种对冷轧带钢的平直度有负面影响。具有凹形中间和（或）近边缘区域的型材会导致波纹，长矛形型材会导致翘曲。对热轧带材横截面轮廓的现有几何参数的分析表明，在某些情况下，在它们的帮助下，实际上不可能预测冷轧带材的平整度。对冷轧带钢平直度的分析确定了四种特定类别的热轧带钢横截面轮廓，它们对冷轧带钢的形状有显着影响，其中三种对冷轧带钢的平直度有负面影响。具有凹形中间和（或）近边缘区域的型材会导致波纹，长矛形型材会导致翘曲。对热轧带材横截面轮廓的现有几何参数的分析表明，在某些情况下，在它们的帮助下，实际上不可能预测冷轧带材的平整度。对冷轧带钢平直度的分析确定了四种特定类别的热轧带钢横截面轮廓，它们对冷轧带钢的形状有显着影响，其中三种对冷轧带钢的平直度有负面影响。具有凹形中间和（或）近边缘区域的型材会导致波纹，长矛形型材会导致翘曲。对冷轧带钢平直度的分析确定了四种特定类别的热轧带钢横截面轮廓，它们对冷轧带钢的形状有显着影响，其中三种对冷轧带钢的平直度有负面影响。具有凹形中间和（或）近边缘区域的型材会导致波纹，长矛形型材会导致翘曲。对冷轧带钢平直度的分析确定了四种特定类别的热轧带钢横截面轮廓，它们对冷轧带钢的形状有显着影响，其中三种对冷轧带钢的平直度有负面影响。具有凹形中间和（或）近边缘区域的型材会导致波纹，长矛形型材会导致翘曲。