摘要
电池壳表面微小点缺陷特别是疑似"砂眼"缺陷已成为制约其产品质量的最重要因素。运用扫描电镜、光学显微镜、聚焦离子束和电解酸蚀法对电池壳表面常见的几类典型点缺陷表面、截面进行宏观和微观形貌观察。结果表明,钢中非金属夹杂(渣)物是造成电池壳表面点缺陷的重要原因,有害夹杂物临界尺寸下限推进至60μm。其爆发的宏观特征形貌规律,可成为加工单元人工挑拣的依据和失效分析的先期预判,成为进一步检验分析的指南。
Surface defects of battery shell especially tiny suspected ＂pinhole＂defects have become the most important factor in the quality of the products.Scanning electron microscopy,optical microscopy,focused ion beam and electrolytic etching treatment were used to characterize several typical types of point defects by observing the macro and micro morphology on surface and the cross section of battery shell.The results show that non-metallic inclusion is the important cause of surface defects on battery shell steel,and the critical size limit of harmful inclusions is down to60 μm.Through the macroscopic morphology characterization,the origin of point defects breakout could be predicted before failure analysis,which has become a quick guide for further samplepreparation and analysis.
出处
《宝钢技术》
CAS
2014年第5期67-75,共9页
Baosteel Technology
关键词
电池壳
表面缺陷
失效分析
砂眼
battery shell
surface defects
failure analysis
pinhole
