热镀锌带钢表面色差缺陷形成机理及改进措施  

Formation mechanism and improvement measures of color difference defect on surface of hot-dip galvanized strip steel

作　　者：段晓溪 马幸江 鲁洋泽 韩志刚[1] 李振[1] 宁媛媛[1] DUAN Xiao-xi;MA Xing-jiang;LU Yang-ze;HAN Zhi-gang;LI Zhen;NING Yuan-yuan(Cold-rolling Department,Shougang Jingtang United Iron and Steel Company Limited,Tangshan 063200,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司冷轧作业部,河北唐山063200

出　　处：《物理测试》2020年第6期37-42,共6页Physics Examination and Testing

摘　　要：为了消除热镀锌板卷的色差缺陷,从热轧、镀锌、冲压工艺对色差缺陷形成机理进行分析。导致热镀锌板卷色差缺陷的主要原因有原料表面粗糙度不均匀、锌层厚度不均、冲压导致锌层开裂。针对这3种不同原因,制定了相应措施在热轧工序冷却装置上进行边部遮蔽;提高沉没辊安装精度、调节镀后冷却段移动风箱上下表面的风量;冲压模具表面强化、润滑等,有效减少了色差缺陷的不合格率。In order to eliminate the color difference defect of hot-dip galvanized sheet,the forming mechanism of color difference defect was analyzed from hot rolling,galvanizing and stamping processes.The main reasons for the color difference defect of hot galvanizing sheet included uneven surface roughness of raw materials,uneven thickness of zinc layer,and cracking of zinc layer caused by stamping.In view of these three different reasons,the corresponding measures were formulated,shielding the side of cooling device in hot rolling process,improving the installation accuracy of sinking roller,and adjusting the air volume on the upper and lower surface of the moving bellows in the cooling section after plating,surface enhancement and lubrication of stamping die,etc.The unqualificate rate of color difference defect effectively decreased.

关 键 词：热镀锌 色差 形成机理 措施 

分 类 号：TG174.4[金属学及工艺—金属表面处理]