旋转电极电火花沉积/堆焊的放电机理  

Discharge mechanism of electro-spark deposition with rotary electrode

作　　者：韩红彪[1] 郭敬迪 焦文清 HAN Hongbiao;GUO Jingdi;JIAO Wenqing(Henan University of Science and Technology,Luoyang 471003,China)

机构地区：[1]河南科技大学

出　　处：《焊接学报》2019年第5期67-72,I0005,共7页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51375146);河南省高等学校重点科研资助项目(17A460012)

摘　　要：为了研究旋转电极电火花沉积/堆焊的放电机理,文中进行单点间隙放电、单点接触放电和旋转电极连续放电试验,对放电过程中两极之间的电压和电流波形进行了采集和分析.结果表明,在一定的电压和间隙条件下,电极与基体之间的介质能够被击穿出现间隙放电现象.接触放电现象主要包括短路放电和间隙放电两个阶段.旋转电极沉积/堆焊过程中电极与基体的接触状态复杂多变,放电过程中既存在非接触放电现象,也存在接触放电和短路放电现象,其中大部分是接触放电现象.Single point gap discharge,single point contact discharge and continuous discharge with rotary electrode tests were conducted in order to study the discharge mechanism of electro-spark deposition with rotary electrode.The voltage and current waveform between the electrode and substrate in discharge process were collected and analyzed.The results show that the medium between electrode and substrate can be broken down and result in gap discharge under certain voltage and gap conditions.Contact discharge mainly consists of two stages:short circuit discharge and gap discharge.The contact state between electrode and substrate is complicated and variable in the process of electro-spark deposition with rotary electrode.During the discharge process,there exists not only non-contact discharge phenomena,but contact discharge and short circuit discharge phenomena.Most of them are contact discharge phenomena.

关 键 词：旋转电极 电火花沉积 接触放电 间隙放电 

分 类 号：TG456[金属学及工艺—焊接]