钨/铜载流摩擦副的电弧烧蚀行为  

Arc Erosion Behavior of W/Cu Current-Carrying Frictional Pairs

作　　者：宋联美[1,2] 张永振 上官宝[3] 

机构地区：[1]机械科学研究总院武汉材料保护研究所特种表面保护材料及应用国家重点实验室,武汉430030 [2]洛阳理工学院材料科学与工程学院,洛阳471023 [3]河南科技大学河南省材料摩擦学重点实验,洛阳471003

出　　处：《机械工程材料》2018年第1期18-22,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51375147;51405134)

摘　　要：在自制载流电弧试验机上进行了钨/铜载流摩擦副的载流电弧烧蚀试验,研究了其电弧烧蚀行为和电弧烧蚀机理。结果表明:随燃弧时间的延长,载流电弧电流下降,电压增加,电场强度则先增后降;载流电弧分为起弧、稳定燃烧和熄弧3个阶段,各阶段的时间间隔分别约占整个燃弧时间的7%,89%和4%,铜试样的严重烧蚀主要发生在起弧阶段和稳定燃烧的初期;随着试验电流的增大,金属蒸气态电弧存在时间延长,铜试样表面的电弧烧蚀坑宽度增加,深度先增后降,这与高熔点钨的沉积加剧有关。Current-carrying arc erosion tests of W/Cu current-carrying frictional pairs were carried out by the home-made current-carrying arc tester.The arc erosion behavior and arc erosion mechanism were studied.The results show that with the arcing time increasing,the current of current-carrying arc decreased,the voltage increased,and the electric field intensity first increased then decreased.The current-carrying arc was divided into three stages of ignition,stable burning and extinction.The time intervals of the three stages were about 7%,89% and 4% of the total arcing time.The serious arc erosion of copper specimen occurred at the ignition stage and at the beginning of stable burning stage.With the increase of test current,the existence time interval of the arc in metallic vapour state extended;the width of arc erosion pit on copper specimen surface increased and the depth first increased then decreased.The results were related to the increasing deposition of tungsten with high melting point.

关 键 词：载流电弧 电弧烧蚀 电弧热输入 电弧力 

分 类 号：TH117[机械工程—机械设计及理论]