铝合金汽车车身点焊电极失效机理及延寿技术研究  

The Research on the Failure Mechanism and Life Extension Technology of Spot Welding Electrode for Aluminum Alloy Automobile Body

作　　者：于汇泳 周慧琳 刘丹 YU Hui-yong;ZHOU Hui-lin;LIU Dan(College of Vehicle and Traffic Engineering,Henan Institute of Technology,Xinxiang 453003,China;College of Materials Science and Engineering,Henan Institute of Technology,Xinxiang 453003,China;Shanghai Turbine Plant Company Limited,Shanghai 200240,China)

机构地区：[1]河南工学院车辆与交通工程学院,河南新乡453003 [2]河南工学院材料科学与工程学院,河南新乡453003 [3]上海汽轮机厂有限公司,上海200240

出　　处：《河南工学院学报》2020年第1期55-59,共5页Journal of Henan Institute of Technology

基　　金：河南省高等学校青年骨干教师培养计划项目(2016GGJS-196);河南省科技攻关项目(192102210214)。

摘　　要：通过试验对铝合金车身点焊电极烧损的失效机理进行了分析。点焊时,由于电极和铝合金工件间的不均匀点接触引起的局部强烈反应,加快了电极的烧损失效速度。利用点焊时的加压作用和其产生的电阻热,在铝合金点焊电极端面成功制得Cu-Ti-B复合涂层,该复合涂层可减轻电极的烧损,延长电极的使用寿命。The paper explored the failure mechanism of electrode burnout during spot welding of automotive aluminum alloys through experiment which indicates that the local strong reaction caused by uneven point contact between the electrode and the aluminum alloy work piece during spot welding accelerates the burning loss of electrodes. The Cu-Ti-B composite coating was successfully fabricated on the end face of the aluminum alloy spot welding electrode by means of the pressurization effect and resistance heat generated during spot welding. The composite coating can reduce the burning loss of the electrode and prolong the service life of the electrode.

关 键 词：铝合金点焊 电极烧损 涂层 

分 类 号：TB333[一般工业技术—材料科学与工程]