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.
出处
《贵金属》
CAS
CSCD
北大核心
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)
