Q235B钢带纵裂缺陷分析

Analysis on Longitudinal Crack Defect of Q235B Steel Belt

纵裂缺陷是薄板厂CSP生产线生产Q235B钢带的主要缺陷。通过对热轧钢带纵裂缺陷的产生原因进行分析,结合CSP生产线实际情况,对产生纵裂的工艺控制点进行相关性分析,总结归纳出恢复相关设备精度、合理使用保护渣、提高结晶器进出水温差等措施,有效的降低了Q235B钢带纵裂缺陷率,提高了热轧钢带的合格率。

The longitudinal crack is the main defect of Q235B steel belt manufactured by CSP production line of CSP Plant.Such measures as restore the accuracy of associated equipment,reasonably use casting powder as well as improve temperature difference of water inlet and outlet for crystallizer are summarized through the correlation analysis of process control points causing longitudinal crack by analyzing the causes of longitudinal crack for hot rolled steel belt combining with the actual situation of CSP production line.As a result,the longitudinal crack defect rate of Q235B steel belt is effectively reduced and qualified rate of hot rolled steel belt is improved.