某汽车蓄电池用H65黄铜电缆端子开裂原因分析  

Cause Analysis on Cracking of H65Brass Cable Terminal of a Automobile Battery

作　　者：薛喜才 邵百明[1] 倪雷[1] 朱玲斌 贾尚华 XUE Xicai;SHAO Baiming;NI Lei;ZHU Lingbin;JIA Shanghua(Passenger Vehicle Company,SAIC Motor Corporation Limited,Shanghai 201800,China)

机构地区：[1]上海汽车集团股份有限公司乘用车公司,上海201800

出　　处：《理化检验（物理分册）》2020年第5期56-58,62,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某汽车蓄电池H65黄铜电缆端子在现场装配后出现多起开裂故障。通过宏观观查、化学成分分析、断口分析、金相检验、硬度测试、盐雾模拟试验等方法对端子开裂的原因进行了分析。结果表明:汽车蓄电池电缆端子冲压成型后残余应力未得到有效释放,且端子在存储期间接触到H2O,O2,CO2等介质,导致其发生了应力腐蚀开裂。There were many cracks in the cable terminal of a automobile battery after assembling on site.The causes of terminal cracking were analyzed by macroscopic observation,chemical composition analysis,fracture analysis,metallographic examination,hardness test and salt spray simulation test.The results show that the residual stress of the battery cable terminal was not effectively released after stamping,and the terminal was exposed to H2O,O2,CO2 and other media during storage,resulting in stress corrosion cracking.

关 键 词：汽车蓄电池 H65黄铜 电缆端子 残余应力 应力腐蚀开裂 

分 类 号：TG178[金属学及工艺—金属表面处理]