摘要
为改善AgSnO2电接触材料的加工变形能力和耐电弧侵蚀性能,采用化学包覆-冷等静压-热挤压集成新工艺,掺杂微量CuO,制备了AgSnO2电接触丝材。采用电子万能试验机、触点材料测试系统以及扫描电镜,研究了AgSnO2材料的室温变形行为和电弧侵蚀特征。结果表明:掺杂微量CuO改善了Ag基体与SnO2颗粒的浸润性,提高了AgSnO2丝材的抗拉强度和断后伸长率。在25V/10A直流阻性负载条件下,AgSnO2(CuO)触头的燃弧能量、燃弧时间和断开熔焊力均较AgSnO2触头的低,且其电弧侵蚀斑点表面更为光滑,但接触电阻小幅增大。
AgSnO2electrical contact wire material was prepared by adopting a new integrated process of chemical coating-cold isostatic pressing-hot extrusion and doping trace CuO to improve its machining deformation performance and arc erosion resistance.The room-temperature deformation behavior and arc erosion characteristics of AgSnO2 material were investigated by electronic testing machine,contact material testing system and scanning electron microscope.The results indicate that doping trace CuO improves the wettability of Ag matrix to SnO2 particles and increases the tensile strength and the fracture elongation of AgSnO2 wire.Under the condition of 25V/10 A DC resistance load,AgSnO2(CuO)contact has lower arc energy,arc duration and puddle welding force than AgSnO2 contact,its arc erosion spots have smoother surface,but its contact resistance slightly increases.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2015年第5期54-57 63,63,共5页
Rare Metals and Cemented Carbides
基金
NSFC-云南联合基金项目(u1302272)
国家自然科学基金项目(51267007)
