电镀锌钢板表面白色线状缺陷的形成机理  

Formation mechanism for white line defect on surface of electro-galvanized sheet

作　　者：董蓓[1] 杨成志[2] 蔡捷[1] 黄道兵[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430081 [2]武汉钢铁股份有限公司冷轧总厂,湖北武汉430081

出　　处：《钢铁研究学报》2015年第7期56-61,72,共7页Journal of Iron and Steel Research

摘　　要：运用扫描电镜、金相显微镜、电子背散射衍射仪研究了电镀锌钢板表面白色线状缺陷产生的原因及形成机理。研究结果表明:白色线状缺陷位置有大量的夹渣,夹渣成分主要为O、Mg、Si、Ca、Al等元素,来自于热轧氧化铁皮的压入和连铸夹渣,同时缺陷处存在高斯织构,影响了电镀锌层晶粒的取向,导致电镀锌表面产生白色线状缺陷。The cause and mechanisms for formation of white line defect on surface of electro-galvanized sheet were investigated by means of SEM, OM, EDAX and EBSD. The research results show that there is much slag mainly containing O, Mg, Si, Ca and A1 at white line defect. The slag is from scale forming during hot rolling and contin- uous casting processes. Meanwhile, Gause texture is found at the defect. The texture influences the grain orienta- tion of laminar zinc, resulting in white line defect on surface of electro-galvanized sheet.

关 键 词：电镀锌钢板 白色线状缺陷 夹渣 高斯织构 

分 类 号：TG115[金属学及工艺—物理冶金]