接触线用微合金化Cu-Ag-Cr合金时效析出行为和电磨损机理探讨  

Discuss on aging characteristics and electrical sliding wear resistance of trace alloyed Cu-Ag-Cr alloy contact wire

作　　者：刘勇[1] 刘平[2] 田保红[1] 贾淑果[1] 王艳蕊[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]上海理工大学电功能材料研究所,上海200093

出　　处：《材料热处理学报》2007年第B08期34-37,共4页Transactions of Materials and Heat Treatment

基　　金：国家863项目(2002AA331112);河南省杰出人才创新基金(0521001200);河南省教育厅自然科学基金项目(2006430004)

摘　　要：对真空熔炼制得的微合金化Cu-0.1Ag-0.6Cr合金进行固溶、时效处理后的显微硬度和导电率进行了测试,并利用TEM、SEM对合金析出相和电滑动磨损表面形貌进行了观察和分析。结果表明形变和时效综合作用能显著提高合金的综合性能:该合金经980℃×20 min固溶处理、60%变形后,在480℃时效30 min可获得良好综合性能,其显微硬度和电导率分别可达165 HV和83%IACS;而圃溶后直接时效仪为154 HV和78%IACS。在载流条件下,合金的磨损量随加载电流的增加而增大;磨损过程中,粘着磨损、磨粒磨损和电烧蚀磨损等形式交互作用,促进了磨损过程的进行。The properties of microhardness and electrical conductivity of trace alloyed Cu-0.1Ag-0.6Cr alloy which been melted by vacuum furnace after soluted-aged were tested in this paper. Using TEM and SEM, the morphology of the precipitations and the tested alloy worn surface were also investigated. The results showed that the compositive effect of deformation and aging could greatly improve the characteristic of the tested alloy. Aging at 480℃ for 30 min after soluted at 980 ℃ for 20 min and 60% cold deformation, the values of microhardness and electrical conductivity can reach 165 HV and 83%IACS, respectivily, but they are only 154 HV and 78%IACS without deformation. The wear volume loss of the alloy increased with increasing electric currents. While with the effect of current, the electrical wear mechanisms are abrasive wear, adhesive wear and arc erosion wear. The interact effects between these above wear forms accelerated the wear course.

关 键 词：Cu-Ag—Cr合金 显微硬度 导电率 磨损机制 

分 类 号：TG146.11[一般工业技术—材料科学与工程]