等离子体电解氧化7075铝合金的干滑动磨损性能及显微组织

施渊吉, 黎军顽, 郭训忠, 于林惠, 李爽, 黄浩

doi:10.16577/j.cnki.42-1215/tb.2021.01.021

材料保护 >

2021 , Vol. 54 >Issue 1: 121 - 126

DOI: https://doi.org/10.16577/j.cnki.42-1215/tb.2021.01.021

工艺探讨

等离子体电解氧化7075铝合金的干滑动磨损性能及显微组织

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1南京工业职业技术大学机械工程学院； 2南京航空航天大学材料科学与技术学院； 3上海大学材料科学与工程学院； 4河北工业职业技术学院科研处

郭训忠(1981-)，教授，研究方向为先进塑性加工技术及工艺装备，电话：13601581696，E-mail: guoxunzhong@nuaa.edu.cn

收稿日期: 2020-07-19

网络出版日期: 2025-07-09

基金资助

江苏省高等学校自然科学研究面上项目(19KJB430024)；江苏省工业软件工程技术研究开发中心开放基金重点项目(ZK190401)资助

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Dry Sliding Wear Properties and Microstructure of 7075 Aluminum Alloy via Plasma Electrolytic Oxidation

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(1.School of Mechanical Engineering, Nanjing Vocational University of Industry Technology, Nanjing 210046, China;2.College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;3.School of Materials Science and Engineering,Shanghai University, Shanghai 200072, China;4.Department of Scientific Research, Hebei college of industry and Technology, Shijiazhuang 050091, China)

Received date: 2020-07-19

Online published: 2025-07-09

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摘要

为了提高7075铝合金的表面性能，在硅酸盐-硼酸盐体系的电解液中，基于脉冲恒电压功率模式，采用等离子体电解氧化法(PEO)对7075铝合金进行表面处理以提高其表面质量，研究了电参数占空比对PEO涂层形貌和磨损性能的影响。采用扫描电子显微镜观察了PEO涂层的表面、截面形貌，并进一步通过磨损试验对涂层磨损性能进行了评价。结果表明：PEO涂层的显微硬度与耐磨性均随占空比的增加先增大后减小，成分分析表明涂层主要由α-Al2O3和γ-Al2O3组成。

关键词： 7075铝合金; 等离子体电解氧化; PEO涂层; 占空比; 显微组织; 磨损试验; 摩擦系数

本文引用格式

施渊吉, 黎军顽, 郭训忠, 于林惠, 李爽, 黄浩 . 等离子体电解氧化7075铝合金的干滑动磨损性能及显微组织[J]. 材料保护, 2021 , 54(1) : 121 -126 . DOI: 10.16577/j.cnki.42-1215/tb.2021.01.021

Abstract

In this paper, 7075 aluminum alloy were treated in silicate-borate based electrolyte via plasma electrolytic oxidation(PEO), employing a pulsed constant voltage power mode to improve the surface quality and surface properties of 7075 aluminum alloy.The effects of electrical parameter(duty cycle)on morphology and wearing behavior of the PEO coatings were thoroughly investigated.The surface and cross section morphology of the coatings was observed by scanning electron microscope.Besides, the wearing properties of the coatings were evaluated by the wearing experiment.Results showed that the microhardness and the wearing resistance of the coatings both first increased and then decreased with the increase of duty cycle.Composition analysis proved the coating was composed of α-Al2O3 and γ-Al2O3.

Key words： 7075 aluminum alloy; plasma electrolytic oxidation; PEO coating; duty cycle; microstructure; wearing test; friction coefficient

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