不同润湿组合配流副的摩擦磨损试验研究

为调控配流副表面润湿性以提高摩擦学性能,采用低面能修饰法制备具有不同润湿性的上试样超级双相不锈钢SAF2507和下试样碳纤维增强聚醚醚酮(CFRPEEK)组成配流副,利用MMD-5A标准摩擦磨损试验机测试并分析其在蒸馏水、海水、L-HM46抗磨液压油3种润滑条件下的摩擦磨损特性。结果表明：低面能修饰使配流副上试样与下试样由亲水表面转变为疏水表面,上下试样表面虽仍保持亲油性但其油接触角明显增大;同种配流副在油、海水、水介质中摩擦因数依次减小;在水、海水、油介质下双疏水表面配流副较双亲水表面配流副摩擦因数分别减小8.2%、38.2%、24.4%;同种配流副在水、海水、油介质中磨痕深度依次减小。配流副的摩擦主要以犁沟效应和黏着磨损为主,双低表面能组合配流副能有效减小摩擦过程中的黏着磨损,从而表现出较好的摩擦学性能。

Experimental Study on Friction and Wear of Valve Pairs with Different Wetting Combinations

In order to control the surface wettability of the port pair and improve the tribological properties,the upper sample super duplex stainless steel SAF2507 and the lower sample carbon fiber reinforced polyetheretherketone(CFRPEEK) with different wettability were prepared by the low surface energy modification method.Using standard friction and wear testing machine MMD-5A,the friction and wear properties of test specimens with different wetting combinations were studied under three different working media,the pure water,seawater and L-HM46 anti-wear hydraulic oil.The test results show that the low surface energy modification changes the surfaces of SAF2507 and CFRPEEK from hydrophobic to hydrophobic,and the upper and lower samples are still hydrophilic surfaces,but the oil contact angle increases significantly.The friction coefficient of the same port pair decrease sequentially in oil,seawater,and water media.In water,seawater and oil media,the friction coefficient of the double-modified surface port pair is reduced by 8.2%,38.2%,and 24.4% compared with the double-hydrophilic surface port pair,respectively.The depth of wear scars of the same distribution pair decreases sequentially in water,seawater and oil media.The friction between SAF2507 and CFRPEEK is mainly due to the furrow effect and adhesive wear.The double low surface energy match achieves the effect of friction reduction by reducing the viscous resistance of the lubricating fluid.