Study on Property and Structure of Duplex Lubricating Film with Lower Friction Coefficient
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摘要: 采用微弧氧化和喷涂二硫化钼基润滑材料并在150～200℃固化2h左右的工艺,在铝合金表面制备了低摩擦系数的复合润滑膜.研究了复合润滑膜的结构与性能对摩擦系数的影响.结果表明,去除微弧氧化膜的表面疏松层获得以γ-Al2O3为主的致密硬化层,使其表面硬度明显提高,并且显著降低复合润滑膜的摩擦系数.微弧氧化层的硬度与载荷大小是影响摩擦系数的主要因素,摩擦系数稳定在0.05～0.08,复合润滑膜制备工艺对基材性能影响较小.Abstract: Duplex lubricating films with lower friction coefficient were prepared on aluminum alloy by micro arc oxidation(MAO)and spraying MoS2-based lubricant material which was solidified about two hours at 150～200℃.The effect of structure and properties on the friction coefficients were studied.The results illustrate that the compact zone mainly containing γ-Al2O3 was obtained by removing the surface loose zone of MAO film,its surface hardness was improved obviously and the friction coefficient of duplex lubricating film was decreased significantly.The surface hardness of compact zone and loading were main factors to the friction coefficients which were in the range of 0.05～0.08 steadily,and the processing of duplex lubricating film has a little effect to tensile properties of the base aluminum alloy.
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Key words:
- aluminium alloy /
- solid lubricant /
- micro arc oxidation /
- molybdenum disulfide /
- friction coefficient
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