高强高导Cu-Cr-Ag-Y合金的时效特征及其载流滑动磨损性能  

Aging Characteristics and Electrical Sliding Wear Properties of Cu-Cr-Ag-Y Alloy with High Strength and High Conductivity

作　　者：王松[1] 谢明[1] 张吉明[1] 朱刚[1] 陈永泰[1] 王塞北[1] 李再久[1] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2014年第A01期62-66,共5页Precious Metals

基　　金：国家自然科学基金项目(51164015);云南省省院省校科技合作项目(2012IB002);云南省应用基础研究项目(2011FB126);昆明市科技创新团队项目(20120101AR070005)

摘　　要：对经过连续铸造、固溶和冷拉拔的Cu-Cr-Ag-Y合金进行时效处理,研究了时效工艺参数对合金组织和性能的影响,探讨了合金的时效特征,并在自制磨损试验机上对合金线材进行载流滑动磨损试验。结果表明:铜基体中球形第二相的均匀析出是合金综合性能提高的根本原因。Cu-0.6Cr-0.15Ag-0.03Y合金经450℃/4 h时效处理后可以获得较好的综合性能,其显微硬度与导电率达到245Hv和80.7%IACS。随着加载电流的增加,合金磨损量变大,其载流磨损机制为电侵蚀磨损、磨粒磨损和粘着磨损。Effects of aging process parameters on microstructures and properties of a Cu-Cr-Ag-Y alloy which was produced by continuous casting, solution-treated and cold draw were investigated,and the aging characteristics of the alloy was analyzed.The electrical sliding wear experiment was carried out using a self-made electrical wear tester. The results reveal that the uniform precipitation of the spherical second phase from the copper matrix is the root cause of the improvement of comprehensive performance. A better combination of properties is obtained for the Cu-0.6Cr-0.15Ag-0.03 Y alloy aged at 450℃ for 4 h, the micro-hardness and electrical conductivity of the alloy are 245 Hv and 80.7%IACS, respectively. The wear loss of the alloy increased with increasing electrical current, and its electrical sliding wear mechanism is the electrical erosion wear, abrasive wear and adhesion wear.

关 键 词：金属材料 Cu-Cr-Ag-Y合金 时效处理 组织与性能 载流磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]