实验证实了当l′/h小于一定值时,即便对于冷轧板带,也会出现宏观的不均匀变形,基于均匀变形假设导出的n_f理论解不适用,必须给以校正量Δn_f∝1/(l′/h)。本文给出的考虑不均匀变形影响的n_f统计模型不仅适用于冷轧机组,也适用于板带热连轧机组与中厚板轧制。 Experiments show that when l ’/ h is less than a certain value, macroscopic nonuniform deformation will occur even in cold rolled strip. Based on the assumption of uniform deformation, the n_f theoretical solution is not applicable, and the correction amount Δn_fα1 / (l ’/ h). The n_f statistical model given in this paper is not only suitable for cold rolling mill, but also for strip hot rolling mill and plate rolling.