汽车后门外板电泳前基板团斑缺陷分析  

Analysis of clump spot defect on hot-dip zinc-coated steel sheet used as outer plate of automotive rear door before electrocoating

作　　者：张维召 王静 ZHANG Weizhao;WANG Jing(Changshu Kehong Material Technology Co.,Ltd.,Changshu 215500,China;Technique Center,Hansteel Co.,Ltd.,Handan 056003,China)

机构地区：[1]常熟科弘材料科技有限公司,江苏常熟215500 [2]邯钢技术中心,河北邯郸056003

出　　处：《电镀与涂饰》2023年第8期41-44,共4页Electroplating & Finishing

基　　金：河北省重大科技成果转化专项(20281004Z)。

摘　　要：某车型汽车后门外板在电泳前发现基板表面有密集的团状斑点缺陷,影响产品外观。采用扫描电镜和能谱仪对缺陷形貌特征和元素成分进行了分析,确定该缺陷是冲压模具表面不洁所致,并在生产环节中得到验证。提出了相应的改进措施,如保持冲压模具间隙调校、定期清洁和光洁度确认,使团斑缺陷得到有效控制。Some visible clump spots were found on the outer plate of automotive rear door made of hot-dip zinc-coated steel sheet before electrocoating process,which affected the appearance quality of the automobile.The surface morphology and elemental composition of the defective area were analyzed by scanning electron microscopy(SEM)and energy-dispersive spectroscopy(EDS).The contamination on the surface of stamping die was regarded as the main cause of this defect,which was further verified in the production process.Some countermeasures were proposed such as routine spacing regulation,regular cleaning,and smoothness confirmation.The problem was then solved.

关 键 词：汽车外板 热浸镀锌 团斑缺陷 表面形貌 元素组成 故障处理 

分 类 号：TG335.5[金属学及工艺—金属压力加工] U466[机械工程—车辆工程]