Abstract：In order to study the cause of longitudinal crack defect of hot rolled coil in CSP production line of thin plate factory, continuous casting process and operating parameters of equipment were investigated and analyzed. The results show that the poor vibration accuracy of vibrating table of continuous casting machine and scaling of the copper plate in the mould are the main reasons for the longitudinal crack of hot rolling.After adjusting the vibration parameters, improving the alignment accuracy of the shaking table and controlling the scale formation of the copper plate, the longitudinal crack defect on the surface of the hot rolled coil plate was reduced, and the longitudinal crack rate decreased from the highest 1.15% to less than 0.10%.In view of CSP casting machine, on the premise of ensuring good thermal conductivity of the mould copper plate, the joint bearing clearance of the four-link mechanism of the mould vibrator should be strictly controlled within 0.02 mm.Elevation deviation of shaking table should be strictly controlled within 0.05 mm.Horizontal displacement of mould vibration is suggested to be controlled within 0.1 mm.
马超, 孙丽钢, 张玮, 关胜, 贾贵君. 包钢CSP热轧卷板纵裂缺陷分析与控制[J]. 连铸, 2020, 39(4): 54-59.
MA Chao, SUN Li-gang, ZHANG Wei, GUAN Sheng, JIA Gui-jun. Analysis and control of longitudinal crack on hot rolled coil in CSP plant of Baotou Steel. CONTINUOUS CASTING, 2020, 39(4): 54-59.
2020, Vol. 39 
