Al-50% Si合金干摩擦磨损性能研究  

Research on Dry Friction and Wear Properties of Al-50%Si Alloy

作　　者：牛秋林[1] 张深圳 荆露 戎杰 邱新义[1] 李鹏南[1] NIU Qiulin;ZHANG Shenzhen;JING Lu;RONG Jie;QIU Xinyi;LI Pengnan(School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Southern Aerospace Industry Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]湖南科技大学机电工程学院,湘潭411201 [2]湖南南方宇航工业股份有限公司,株洲412000

出　　处：《航空制造技术》2025年第6期115-122,共8页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52075168,51605161);湖南省自然科学基金面上项目(2025JJ50275)。

摘　　要：开展硬质合金与Al-50%Si合金干摩擦磨损试验,旨在探究载荷、滑动速度对Al-50%Si合金摩擦磨损性能的影响及硬质合金磨损机理。结果表明,摩擦系数随时间呈现3个变化阶段:磨合阶段、过渡阶段、稳定阶段。Al-50%Si合金磨损量随载荷、滑动速度的增加而增大。低滑动载荷摩擦条件下,Al-50%Si合金的磨损机理为剥层磨损;当载荷超过50 N时,Al-50%Si合金的磨损机理转变为“磨粒磨损+剥层磨损”。低滑动速度摩擦条件下,Al-50%Si合金的磨损机理为“剥层磨损+磨粒磨损”;随着滑动速度的提高,Al-50%Si合金的磨损机理变为剥层磨损。同时,硬质合金球表面主要产生划痕、粘结、剥落等磨损特征,磨损机制为粘结磨损和磨粒磨损。The dry friction and wear tests of cemented carbide and Al-50%Si alloy were carried out to explore effects of load and sliding speed on the friction and wear properties of Al-50%Si alloy and wear mechanism of the cemented carbide.The results show that friction coefficient changes in three stages with time:running-in stage,transition stage and stable stage.The wear amount of Al-50%Si alloy increases with the increase of load and sliding speed.The wear mechanism of Al-50%Si alloy at low sliding load is delamination wear;when the load exceeds 50 N,the wear mechanism of Al-50%Si alloy changes to"abrasive wear+delamination wear".At low sliding speed,the wear mechanism of Al-50%Si alloy is"delamination wear+abrasive wear";with the increase of sliding speed,the wear mechanism is mainly delamination wear.Moreover,the surface of cemented carbide ball has wear features of scratch,adhesion,and delamination,and wear mechanism of adhesive wear and abrasive wear.

关 键 词：硬质合金 Al-50%Si合金 干摩擦磨损 摩擦系数 剥层磨损 磨损机制 

分 类 号：TH117.1[机械工程—机械设计及理论] TG146.2[一般工业技术—材料科学与工程]