高压电器2024，Vol.60Issue(4)：1-9,9.DOI:10.13296/j.1001-1609.hva.2024.04.001
CuCr55电极触头真空电弧燃弧与烧蚀特性
Vacuum Arc Ignition and Ablation Characteristics of CuCr55 Electrode Contacts
摘要
Abstract
Copper-chromium alloy materials,as one of the most important contact materials in the field of electrical contacts,have been widely used in vacuum interrupter.CuCr55 contact materials are prepared by arc melting method and the micro-structures of fusion casting CuCr25,fusion infiltration CuCr50 and arc melting CuCr55 materials are compared and the vacuum arc ignition and ablation characteristics of arc melting CuCr55 contacts are particularly an-alyzed.A high-speed camera is used to photograph the arcing characteristic of short circuit current and the critical current for generating anode spots is obtained.The electron microscope is used to observe the micro-morphology of the contact surface after ablation,the material fracture,fine cracks or significant bulging are not happened on the con-tact surface.The research results show that the arc melting CuCr55 contacts have a micro structure with fine and uni-form chromium particles,diffuse distribution of micro structure spheroidization,and good uniform ablation character-istics.关键词
真空灭弧室/触头材料/真空电弧/材料烧蚀Key words
vacuum interrupter/contact material/vacuum arc/material ablation引用本文复制引用
薄祥来,刘思远,谢洪涛,王小军,冯卫刚,李鹏,刘志远..CuCr55电极触头真空电弧燃弧与烧蚀特性[J].高压电器,2024,60(4):1-9,9.基金项目
国家重点研发计划项目(2022YFB2403702) （2022YFB2403702）
国家自然科学基金联合基金项目(U22B20121). Project Supported by National Key Research and Development Program(2022YFB2403702),the Joint Funds of the National Natural Science Foundation of China(U22B20121). （U22B20121）
