时效工艺对Cu-Ag-Zr合金电磨损性能的影响  

Study of Aging Property and Electrical Wear Resistance of Cu-Ag-Zr Alloy for Contact Wire Line Used in Catenary of Railway

作　　者：马行驰[1] 黄金亮[1] 贾淑果[1] 刘平[1] 田保红[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

出　　处：《河南科技大学学报（自然科学版）》2005年第3期7-9,21,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家高技术研究发展计划(863)资助项目(2002AA331110)

摘　　要：对Cu0.1Ag0.18Zr合金时效后的电导率、显微硬度以及电滑动磨损性能进行了研究。结果表明:该合金940℃固溶1h后,在560℃时效可获得较高的电导率,在480℃时效可获得较高的显微硬度。时效前冷变形能大大加快第二相的析出过程,使合金综合性能显著提高。该合金经940℃固溶再经60%变形后,在480℃时效1h,其电导率和显微硬度分别可达85.6%IACS和HV131.2,而固溶后直接时效为81.3%IACS和HV116.1。在载流条件下,合金的磨损量随加载电流的增加而增大;磨损机制是以电蚀为主的电蚀、犁削和磨粒磨损。The microhardness and electrical conductivity and wear resistance of the aged Cu-0. lAg-0. 18Zr alloy were studied.The results show that after solution treatment at 940℃ for 1 h,the higher electrical conductivity can be obtained on aging at 560℃ and higher microhardness can be obtained on aging at 480℃ . The precipitation process of the secondary phase can be accelerated by cold deformation before aging, which greatly improved the properties of the alloy. After 60% cold deformation, the electrical conductivity of about 85.6% IACS and microhardness HV 131.2 can be reached respectively on aging at 480℃ for 1 h. , while they are only 81.3% IACS and HV 116.1 directly aged after solution treatment. The wear rate of the alloy is increased with the increase of electric current. The electrical sliding wear mechanism is the arc erosion, plough wear and abrasive wear dominated by arc erosion.

关 键 词：电磨损性能 合金 时效工艺 滑动磨损性能 显微硬度 IACS 电导率 析出过程 综合性能 磨损机制 磨粒磨损 固溶 第二相 变形能 磨损量 电蚀 

分 类 号：TG166.2[金属学及工艺—热处理] TB333[金属学及工艺—金属学]