酒钢冷轧低碳钢薄板表面“黑线”缺陷成因及控制  

Cause and Control of Surface“Black Line”Defects of Cold-Rolled Low Carbon Sheet in JISCO

作　　者：杨作宏[1] 邹明[2] 郑跃强[2] 

机构地区：[1]酒泉钢铁(集团)有限责任公司总工程师室,甘肃嘉峪关735100 [2]酒泉钢铁(集团)有限责任公司碳钢薄板厂,甘肃嘉峪关735100

出　　处：《物理测试》2013年第5期28-32,共5页Physics Examination and Testing

摘　　要：对酒钢CSP冷连轧机组生产的低碳钢薄板表面出现的长、短两类"黑线"缺陷进行了光学显微镜(OM)和扫描电镜(SEM)形貌观察及能谱仪(EDS)成分测定,并结合生产工艺分析确认,"长黑线"缺陷是连铸环节产生的外来夹杂物在冷轧后暴露所造成的,"短黑线"缺陷是由于CSP均热炉炉辊辊环结瘤造成热轧板下表面氧化铁皮压入产生的。据此,提出相应的解决措施并优化生产工艺。改进后冷轧板表面质量合格率提高了6%。The surface defects of long and short ＂black line＂ appeare on the low carbon steel sheet from the CSP cold rolling process in JISCO were analyzed by optical microscopy （OM）, scanning electron microscopy （SEM） and en- ergy dispersive spectroscopy （EDS）. Combining the analysis of production processes, it shows that the ＂long black line＂ defect is caused by foreign inclusions formed during continuous casting and exposed after cold rolling. The＂ short black line＂ defect is due to the rolled-in oxide scale in the bottom surface of hot-rolled plates, which is caused by the roll ring nodulation in soaking furnace. Based on the result, the corresponding solutions to improve produc- tion processes were suggested. After improving, the surface qualified rate of the cold-rolled sheet increases by 6 .

关 键 词：冷轧板 缺陷 夹杂物 氧化铁 

分 类 号：TG335.12[金属学及工艺—金属压力加工]