摘要
热轧工序中钢材氧化铁皮的形成受轧制工艺参数、钢种、设备等因素的影响,容易导致带钢表面质量不合格,并造成产线正常生产秩序被打乱。针对连铸连轧短流程产线低碳钢因氧化铁皮缺陷降级率高的问题,结合产线特点和轧制工艺,对氧化铁皮缺陷形成原因和控制措施进行了研究。结果表明:短流程工艺成品带钢氧化铁皮缺陷主要分为板道系﹑温度系﹑除鳞系3类。板道系氧化铁皮缺陷主要是产线辊道工况异常形成的柳叶状或纺锤状氧化铁皮压入,温度系氧化铁皮缺陷主要受轧制工艺制度的影响,除鳞系氧化铁皮缺陷主要由除鳞设备能力不足造成。通过对轧前工况设备的确认﹑使用合理的轧制温度和卷取温度,以及改造升级除鳞集管设备,将成品带钢氧化铁皮缺陷降级率由之前的10%以上降至0。
The formation of steel oxide scale in hot rolling process is affected by rolling process parameters,steel types,equipment and other factors,which easily leads to unqualified surface quality of strip and disorder of normal production of production line.Aiming at the problem of high degradation rate of low carbon steel strip in short process of continuous casting and rolling due to defects of oxide scale,based on the characteristics of production line and rolling technology,the formation reasons and control measures of oxide scale were studied.The results show that the oxide scale defects are mainly divided into three categories:plate system and,temperature system and descaling system.The oxide scale defect of the plate system is mainly forced into the willow leaf or spindle shaped oxide scales formed by abnormal rolling conditions of the roller table of the production line.The oxide scale defect of temperature system is mainly affected by the rolling process system,the oxide scale defect of descaling system iron sheet is mainly caused by insufficient descaling equipment.The degration rate of finished strip due to oxide scale will be reduced from more than 10%to 0 by confirming the equipment before rolling,using reasonable rolling temperature and coiling temperature,and upgrading the descaling header equipment.
作者
李生存
王浩宇
周旬
张郢
LI Shengcun;WANG Haoyu;ZHOU Xun;ZHANG Ying(Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,China)
出处
《轧钢》
北大核心
2024年第1期112-117,共6页
Steel Rolling
关键词
氧化铁皮缺陷
薄板坯连铸连轧
短流程
低碳钢
铁素体区轧制
除鳞
oxide scale defect
continuous casting and rolling of thin slab
short process
low carbon steel
ferritic zone rolling
descaling
