(中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083)
摘 要: 對不同載荷條件下AuNi9/金鍍層摩擦副的摩擦磨損行為進行研究，觀察并分析磨損表面和磨屑的形貌。結(jié)果表明：在0.2 N條件下摩擦因數(shù)為0.8，0.4 N條件下摩擦因數(shù)從初始的0.6經(jīng)12 km的滑動距離后降低至0.3。低載荷條件下，金鍍層主要發(fā)生粘著磨損，經(jīng)20 km距離的測試鍍層未出現(xiàn)嚴(yán)重的磨損；高載荷條件下，金鍍層的主要磨損機制為磨粒磨損，鍍層磨損表面發(fā)生嚴(yán)重的塑性變形和產(chǎn)生較深的犁溝，磨損嚴(yán)重。AuNi9/金鍍層摩擦副以金鍍層的磨損為主，AuNi9合金絲磨損為輔，低載荷條件下，AuNi9合金絲和金鍍層均發(fā)生適度的磨損，摩擦副具有長的使用壽命。
關(guān)鍵字: 合金；金鍍層；載荷；摩擦磨損性能
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The friction and wear behavior of AuNi9/Au coating tribo-couple under different loads was investigated, and the characteristics of worn surface and wear debris were also observed and analyzed. The results show that the friction coefficient at the load of 0.2 N is 0.8 and the friction coefficient at the load of 0.4 N decreases from 0.6 to 0.3 after 12 km sliding distance. Under low load condition, the sliding wear of Au coating mainly occurs by adhesive wear, and the degree of coating wear is limited when the sliding wear test of 20 km is conducted. Under high load condition, the dominant wear mechanism of Au coating is abrasive wear, and the severe plastic deformation and deep grooves are observed in the worn surface of the coating. The wear degree of Au coating is more severe than that of AuNi9 alloy fiber. The wear of AuNi9 alloy fiber and Au coating is acceptable at low load, and the tribo-couple can operate for extended periods of time.
Key words: alloy; Au coating; load; tribological property
