滑动速度对AZ31镁合金微弧氧化膜磨损性能的影响.doc

文档介绍：
滑动速度对 AZ31 镁合金微弧氧化膜磨损性
能的影响#
韩晓光*
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(大连海事大学交通运输装备与海洋工程学院大连市 116023)
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陶瓷膜,利用摩擦磨
损试验机研究了微弧氧化膜的滑动干摩擦行为。采用 X 射线衍射仪和扫描电镜对陶瓷涂层
结构和磨损表面进行分析和观察。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 - 之间波动。
氧化膜磨穿以后摩擦因数与基体摩擦因数相近。微弧氧化膜的磨损机理主要是磨粒磨损。
关键词:摩擦磨损;AZ31 镁合金;微弧氧化膜;滑动速度
中图分类号:
The influence of sliding velocity to the wear property of
microarc oxidation film on AZ31 magnesium alloy
HAN Xiaoguang
(Transportation Equipments and Ocean Engineering College, Dalian Maritime University,
Dalian,116026, China)
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 trobological machine. The phases and microstructure were
identified and observed by using X-ray diffractometry(XRD) and scanning electron
microscopy(SEM). The MAO film was posed 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 to . The friction coefficient of the worn film is close to
that of the matrix alloy. Abrasion is the main mechnism for the MAO film.
Key words: Sliding wear; AZ31 magnesium alloy; microarc oxidation film; sliding vel