铝青铜与碳纤增强聚醚醚酮的滑动摩擦特性研究  

Tribological Behaviours of Aluminium Bronze Sliding Against Carbon Fiber Reinforced Polyetheretherketone

作　　者：唐群国[1] 陈晶田[2] 金文浩[1] 

机构地区：[1]华中科技大学机械科学与工程学院液压与气动中心,武汉430074 [2]华中科技大学光电子科学与工程学院,武汉430074

出　　处：《机械科学与技术》2011年第9期1519-1523,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家863计划项目(2008AA09Z202);国家科技发展支撑计划项目(2006BAF01B03-02)资助

摘　　要：为了了解铝青铜QAl9-4和碳纤增强聚醚醚酮(CFRPEEK)在水液压元件摩擦副中应用的可行性,通过环-环端面接触的摩擦试验机对铝青铜QAl9-4和CFRPEEK在水润滑和干摩擦条件下的摩擦磨损性能进行了试验研究,探讨了压力和滑动速度对摩擦系数及材料磨损率的影响关系,对铝青铜QAl9-4和CFRPEEK的摩擦磨损机理进行了分析讨论。在水润滑下,摩擦系数及体积磨损率总体上随滑动速度增加呈下降趋势,压力对摩擦系数影响不大,材料的磨损率随压力增加呈上升趋势,QAl9-4的体积磨损率明显高于CFRPEEK。在水润滑下,QAl9-4的主要磨损机理是粘着磨损以及嵌入CFR-PEEK的QAl9-4磨屑引起的磨粒磨损,CFRPEEK的磨损机理主要是以塑性涂抹为特征的粘着、QAl9-4表面粗糙峰引起的机械犁耕。在干摩擦条件下,摩擦系数和材料磨损量较水润滑均显著增加,且摩擦系数不稳定。水的润滑作用和冷却散热效应是造成两种摩擦条件下差异的主要原因。Friction and wear characteristics of carbon fiber reinforced polyetheretherketone（CFRPEEK） sliding on aluminum bronze QA19-4 was investigated on a ring-ring contact tribo test rig under water lubrication and dry condition respectively in order to learn about their applicability in the design of friction counterparts of water hydraulic elements.Effects of sliding velocity and normal pressure on friction factor and wear have been obtained.The friction and wear mechanism was further analyzed and discussed.The effect of sliding velocity on the friction factor is greater compared with normal pressure.The friction factor and volumetric wear rate of both aluminium bronze and CFRPEEK generally decrease with velocity,while pressure has little influence on the friction factor.But the wear rate of materials tends to increase with the pressure.The wear rate of aluminium bronze is much higher than that of CFRPEEK.The main wear mechanism of aluminium bronze is adhesive wear and abrasive wear caused by the aluminium bronze particles caught in the CFRPEEK.The main wear mechanism of CFRPEEK is adhesive wear and mechanical ploughing.As for the dry sliding case,both friction and wear increase remarkably and the friction factor gets unsteady.The lubrication effects and heat dissipation effects of water are attributed to the difference.

关 键 词：铝青铜 聚醚醚酮 水润滑 干摩擦 滑动摩擦 

分 类 号：TB332[一般工业技术—材料科学与工程]