摘要
为了提高2024铝合金的耐磨性,对其进行微弧氧化。利用扫描电镜(SEM)和X射线衍射仪(XRD)分析了涂层的微观组织结构和物相组成;采用高速往复摩擦磨损试验机对2024铝合金微弧氧化涂层在不同载荷下的磨损性能进行了研究,并采用白光三维形貌仪进行磨损形貌分析及磨损体积计算。结果表明:2024铝合金微弧氧化涂层是一种微孔结构,涂层相主要成分为α-Al_2O_3、γ-Al_2O_3,且Al_2O_3具有高硬度、耐磨损的优良特性,有利于提高铝合金的耐磨损性能;微弧氧化涂层的摩擦系数随着载荷的增加而减小,而磨损量随载荷的增加而增加,磨损机理为磨粒磨损。
In order to improve the wear resistance of 2024 aluminum alloy, micro-arc oxidation （MAO） technology was used to prepare the coat- ing on 2024 aluminum alloy. Scanning electron microscopy （SEM） and X-ray diffractometer （XRD） were employed to analyze the microstructure and phase composition of MAO coating. In addition, high speed reciprocating friction and wear tester was used to test wear resistance of MAO coating on 2024 aluminum under different loads, and the wear performance was evaluated by 3D profiler. Results showed that the micro-arc oxida- tion coating on 2024 aluminum alloy had a dense porous structure, and the coating was composed of α-Al2O3 and γ-Al2O3 with excellent high- hardness and anti-wear properties, which was beneficial to improving the wear resistance of Al alloy. Besides, with the increase of the applied loads, the friction coefficient of micro-arc oxidation coating decreased, and the wear volume increased. The wear mechanism was abrasive wear.
出处
《材料保护》
CSCD
北大核心
2017年第10期1-4,共4页
Materials Protection
基金
国家自然科学基金项目(51404217
41772390)资助
关键词
微弧氧化
2024铝合金
载荷
耐磨性
micro- arc oxidation
2024 aluminum alloy
load
wear resistance
