Hot rolled plate 380CL surface cross fold defects affect the process processing of downstream customers,resulting in lower production rate of downstream processes,affecting the appearance quality of the final product,users often complain about the quality,and even cause quality objections.In order to solve such surface quality de-fects,through the investigation and analysis of the composition,properties,structure,plate shape and hot rolling process of 380CL hot-rolled,the key causes of surface cross wrinkles were found.Taking the process cost into ac-count,the final rolling temperature of hot-rolled products and the ratio of upper and lower layer cooling water were adjusted without increasing the leveling process.Moreover,the strategy of cooling water input between the finishing mill is formulated to reduce the C-warping of the finished hot rolled sheet,reduce the hardness difference between the upper and lower surfaces of the hot rolled strip,and eliminate the cross fold defects caused by the un-coiling of the hot rolled plate 380CL,which provides a new idea to solve the cross fold surface defects in the hot rolled sheet.
万方数据
维普
