PTFE/金属自润滑复合材料的磨损性能研究

Study on wear property of PTFE/metal selflubricating composites

用MM-200磨损试验机对纯PTFE板料、3层复合材料(DU)及钉板型复合材料的工作层在干摩擦定载荷条件下的磨损性能进行了研究;用SEM对磨损试样表面和磨屑形貌进行观察和分析。结果表明:铜和PTFE的复合能提高PTFE的耐磨性并改变其磨屑的形成机理;铜钉板取代传统的平钢板,不仅提高了材料的承载能力,也大大提高了材料的耐磨性能;在干摩擦条件下,纯PTFE板料主要发生粘着磨损和微凸体刨切,3层复合材料主要是磨粒磨损,钉板型复合材料的磨损机理是粘着磨损和磨粒磨损共同作用。

Under dry friction condition and constant load, the wear properties of pure PTFE material, three-layer composite and copper nail plate composite were studied by MM-200 wear tester. The frictional surfaces of testing composite and the wear debris were examined by the way of SEM The results showed that the composite of Cu and PTFE can improved the anti-wear property and changed the form mechanism of debris; copper nail plate replacing national even steel plate not only improved the capacity of load, but also enhanced the anti-wear property of material; under dry friction condition, the wear mechanism of pure PTFE material was adhension wear and ting convex grain planning, the wear mechanism of three-layer composite was abrasion, the wear mechanism of copper nail plate composite was conjunct effect of adhesion and abrasion.