Abstract:In recent years, the shape quality of hot strip has been focused by more and more customer. The flattening of hot strip coil is used to improve the shape quality. However, the process of flattening brought a large number of surface quality defects. The scractch among surface defects affected on the surface quality of the strip most severely. Scratch is caused by the shear slip of local metal, resulting from the relative sliding of adjacent layers with high pressure. The reason of relative sliding is that the static friction between adjacent layers is not enough to counteract the rotary inertia of coil. The radius mutation between the rugged area and the adjacent smooth area causes sufficient pressure on local contact surface, which results in shear slip of local metal. Finally the corresponding preventive measures are pointed out.
王淑华,马光宗,吕长宝. 热轧钢卷平整生产线挫伤缺陷的原因分析[J]. 中国冶金, 2014, 24(5): 45-49.
WANG Shu-hua,MA Guang-zong,L Chang-bao. Analysis of Scratch in Flatening of Hot Rolled Strip Coil. China Metallurgy, 2014, 24(5): 45-49.