烧蚀作用下石墨焊接池与电极接触行为研究  

Research on the Contact Behavior of Graphite Welding Pool and Electrode under Ablation

作　　者：杨海燕[1] 高阳臻 袁森[2,3] 龙琴 YANG Haiyan;GAO Yangzhen;YUAN Sen;LONG Qin(Guizhou Vocational Technology College of Electronics and Information,Kaili 556000,China;School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;School of Mechanical Engineering,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州电子信息职业技术学院,贵州凯里556000 [2]贵州大学机械工程学院,贵州贵阳550025 [3]贵州理工学院机械工程学院,贵州贵阳550003

出　　处：《机械与电子》2023年第5期3-6,共4页Machinery & Electronics

基　　金：国家自然科学基金资助项目(51664006);贵州省科技计划项目(黔科合平台人才[2017]5788号)。

摘　　要：通过测试分析不同石墨焊接池表面形貌、烧蚀率等性能,提出石墨焊接池均匀退化烧蚀特征,建立以线烧蚀系数为表征的烧蚀状态下动态接触电阻模型。且通过实验验证分析了15 N夹持力作用下,石墨表面烧蚀作用对接触电阻的影响。结果表明:石墨焊接池在直径方向的烧蚀速率较大,石墨表面烧蚀作用使得界面接触电阻呈缓慢增加趋势,普通石墨的烧蚀对界面接触电阻的影响相较于精细石墨的作用更加明显,并且模型的计算值与实测值基本一致,误差在合理范围内,保证了模型建立的合理性和准确性。Through testing and analyzing the surface morphology and ablative rate of different graphite welding pools,the uniform degradation ablative characteristics of graphite welding pools were proposed,and the dynamic contact resistance model characterized by linear ablative coefficient was established.The influence of graphite surface ablation on contact resistance under 15 N clamping force was verified and analyzed by experiments.The results show that:the ablative rate of graphite welding pool in the diameter direction is large,and the ablative effect of graphite surface makes the interface contact resistance increase slowly.The effect of ordinary graphite ablation on the interface contact resistance is more obvious than that of fine graphite,and the calculated value of the model is basically consistent with the measured value,and the error is within a reasonable range,ensuring the rationality and accuracy of the model.

关 键 词：Cu/Ni金属丝 深熔钎焊 接触电阻 烧蚀 

分 类 号：TG454[金属学及工艺—焊接]