一、序言一般认为,轧制板材产生平坦度不良的原因如下:在不同的轧制条件下,由于板宽方向上的压下率不均匀,在与横向塑性变形的平衡下,钢板轧向的应变在横向上的分布便会变得不均匀。然而这种应变不均匀程度较小时,就会全部作为残余应力而被吸收,不会产生平坦度不良现象。当延伸不均匀增大时,残余应力便也随之增大,钢板就不能在平坦状态下保持较快的残余应力,因而沿轧向产生纵向弯曲,导致平坦度不良。所以,为了采用解析方法求得平坦度,就需要使用 I. Preface It is generally believed that the reasons for the poor flatness of the rolled sheet are as follows: under different rolling conditions, due to the non-uniform rolling reduction in the width direction of the sheet, under the balance with the transverse plastic deformation, Strain in the horizontal distribution will become uneven. However, when the degree of strain non-uniformity is small, all of them are absorbed as residual stress, and flatness is not deteriorated. When the non-uniform elongation increases, the residual stress increases. As a result, the steel plate can not maintain fast residual stress in the flat state. As a result, longitudinal bending occurs in the rolling direction, resulting in poor flatness. Therefore, in order to use analytic methods to obtain flatness, you need to use