藕状多孔铜基自润滑材料的载流磨损性能  

Current-carrying Wear Properties of a Self-lubricating Material Fabricated with Lotus-type Porous Copper

作　　者：钟豪 金青林[1] ZHONG Hao;JIN Qinglin(Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)

机构地区：[1]昆明理工大学材料科学与工程学院

出　　处：《热加工工艺》2019年第14期80-83,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51164018)

摘　　要：采用机械挤压法制备了以藕状多孔铜铬合金为基体,石墨为润滑相的自润滑材料,并测试了这种自润滑材料的载流磨损特性。本文分析了载流磨损性能随藕状多孔铜铬合金的成分和电流强度的变化规律,并借助SEM、EDS等表征手段分析了其磨损机理。结果表明:自润滑材料的磨损率随着基体Cr含量的增加而减小,随着电流强度的增加而增大;磨损机制均以氧化磨损和磨粒磨损为主,并伴随有塑性变形和粘着磨损。A self-lubricating material characterized by lotus-type porous Cu-Cr alloy as matrix and graphite as lubricant phase was fabricated by mechanical extrusion process. The current-carrying wear rate of the self-lubricating material was measured. It was found that the current-carrying wear properties changed with the current, alloy content and average pore diameter of the lotus-type porous Cu-Cr alloy. The wear mechanism of the self-lubricating material was analyzed by using SEM and EDS. The results indicate that the wear rate of the self-lubricating material decreases with the increase of the Cr content and increases with the increase of the current intensity. Oxidation and abrasive wear, accompanied with plastic deformation and adhesion wear are considered to be the main wear mechanism for the self-lubricating material.

关 键 词：藕状多孔铜 自润滑 磨损性能 载流 磨损机制 

分 类 号：TB333[一般工业技术—材料科学与工程]