热轧铜/钢/铜复合板冲压件底部开裂分析  

Analysis of Bottom Cracking of Hot Rolled Copper/Steel/Copper Clad Sheet Stamping Parts

作　　者：王鹏举 向多伦 杨洋 李雄 刘新 房金龙 Wang Pengju;Xiang Duolun;Yang Yang

机构地区：[1]重庆长江电工工业集团有限公司,401336 [2]中国北方工业有限公司

出　　处：《工程机械》2025年第1期115-121,I0011,I0012,共9页Construction Machinery and Equipment

摘　　要：针对热轧铜/钢/铜复合板冲压后底部圆角开裂问题,采用数值模拟、扫描电镜、透射电镜以及力学拉伸测试,对冲压后有底裂和无底裂两种板材的界面、力学性能以及冲压过程中的受力变形情况进行分析。结果表明:通过有限元分析得出,复合板冲压件的底部铜层变形量较大;与无底裂复合板相比,有底裂板材铜/钢界面存在断续褐色锌的氧化物;两种板材具有相似的力学性能,但有底裂板材断口处铜层与钢层存在明显的开裂现象;铜/钢界面存在锌的氧化物造成了冲压件底部的开裂。In view of the problem of bottom round corner cracking of hot rolled copper/steel/copper clad sheets after stamping,numerical simulation,scanning electron microscope,transmission electron microscope and mechanical tensile testing are adopted to analyze the interface and mechanical properties of two sheets with and without bottom cracks after stamping,as well as the stress deformation during stamping.The results show that,through finite element analysis,the bottom copper layer of the clad sheet stamping part has a relatively large deformation;compared with the clad sheet without bottom cracks,the sheet with bottom cracks has intermittent brown zinc oxides at the copper/steel interface;the two sheets have similar mechanical properties,but there is an obvious cracking phenomenon in the copper layer and the steel layer at the fracture of the sheet with bottom cracks;the zinc oxides at the copper/steel interface cause cracking at the bottom of the stamping parts.

关 键 词：铜/钢/铜复合薄板 底部开裂 微观组织 力学性能 有限元分析 

分 类 号：TG386[金属学及工艺—金属压力加工]