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滑动速度对AZ31镁合金微弧氧化膜磨损性能的影响

发表时间:2014-05-15  浏览量:1634  下载量:481
全部作者: 徐宝库,韩晓光
作者单位: 北车(大连)柴油机有限公司;大连海事大学交通运输装备与海洋工程学院
摘 要: 在AZ31镁合金表面采用硅酸钠电解质体系制备均匀的微弧氧化(microarc oxidation, MAO)陶瓷膜,采用Si3N4球做对磨副,利用WTM-2E型摩擦磨损试验机研究MAO膜的滑动干摩擦行为。采用X射线衍射仪(X-ray diffraction, XRD)和扫描电子显微镜(scanning electron microscopy, SEM)对陶瓷涂层结构和磨损表面进行分析与观察。氧化膜的相结构主要由MgO和Mg2SiO4构成。氧化膜的摩擦系数和磨损量均随滑动速度的增加而逐渐减小,氧化膜的摩擦因数在0.9~1.1之间波动。氧化膜磨穿之后摩擦因数与基体摩擦因数相近。MAO膜的磨损机理主要是磨粒磨损。
关 键 词: 材料失效与保护;摩擦磨损;AZ31镁合金;微弧氧化膜;滑动速度
Title: Influence of sliding velocity on the wear property of microarc oxidation film on AZ31 magnesium alloy
Author: XU Baoku, HAN Xiaoguang
Organization: CNR Dalian Diesel Engine Co., Ltd.; Transportation Equipments and Ocean Engineering College, Dalian Maritime University
Abstract: A uniform microarc oxidation (MAO) film was prepared on the surface of AZ31 magnesium alloy in silicate solution electrolyte. The dry sliding wear behavior of the MAO film was carried out on a WTM-2E tribological machine. The phases and microstructure were identified and observed by using X-ray diffraction(XRD) and scanning electron microscopy(SEM). The MAO film was mainly composed of MgO and Mg2SiO4. Both the weight loss and friction coefficient of MAO film decreased with the increase of sliding velocity, and the friction coefficient fluctuated from 0.9 to 1.1. The friction coefficient of the worn film was close to that of the matrix alloy. Abrasion is the main mechanism for the MAO film
Key words: failure and protection of material; sliding wear; AZ31 magnesium alloy; microarc oxidation film; sliding velocity
发表期数: 2014年5月第9期
引用格式: 徐宝库,韩晓光. 滑动速度对AZ31镁合金微弧氧化膜磨损性能的影响[J]. 中国科技论文在线精品论文,2014,7(9):892-896.
 
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