摘要
利用超景深光学显微镜、扫描电子显微镜(SEM)、能谱仪(EDS)等对1235D铝合金电池箔针孔缺陷位置进行宏观、微观形貌观察,并对针孔处异常区域进行微区成分分析,探究针孔形成原因。结果表明:1235D铝合金电池箔针孔形貌主要呈现三种类型,A类沿轧制方向呈不规则豁口状,B类沿轧制方向呈长条状,C类垂直于轧制方向呈不规则凹坑状。在三种针孔处均发现明显异物,根据能谱成分分析结果,推断异物分别与富Fe析出相、轧辊脱落物及熔体精炼后残留杂质相关联。依据三类针孔的形成机制,分别提出添加变质剂、规范轧辊磨削工艺及增加多孔管式过滤器等改善措施,降低了针孔密度,减少了D级及以上针孔数量,针孔缺陷得到改善。
Ultra-depth of field optical microscope,scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)and other equipment were used to observe the macro and micro morphologies of the location of pinhole defects of the 1235D aluminum alloy battery foil,and the abnormal area at the pinholes were analyzed to explore the cause of pinholes formation.The results show that there are mainly three types of pinhole morphologies.Type A presents irregular notch along the rolling direction.Type B presents a long strip along the rolling direction.Type C is pits with irregular shape perpendicular to the rolling direction.Significant foreign matters are found at the three types of pinholes.According to the analysis of energy spectrum,it is inferred that the foreign matters are related to Fe-rich precipitates,materials falling off the roll and residual impurities after melt refining.On the basis of théformation mechanism of three types of pinholes,the corresponding improvement measures such as adding modifier,standardizing roll grinding process and adding porous tubular filter are proposed respectively,which reduce the pinhole density and the number of pinholes of grade D and above,improving the pinhole defects as a result.
作者
徐红轩
田国建
川崎拓
王玉莲
吴小永
XU Hong-xuan;TIAN Guo-jian;KAWASAKI Hira-ku;WANG Yu-lian;WU Xiao-yong(Jiangsu Dingsheng New Materials Joint-stock Co.,LTD.,Zhenjiang 212141,China)
出处
《轻合金加工技术》
CAS
2022年第9期36-40,共5页
Light Alloy Fabrication Technology
关键词
1235D铝合金
电池箔
针孔
改善措施
1235D aluminum alloy
battery foil
pinhole
improvement measures
