织构化喷涂涂层摩擦学特性的研究

发布时间：2018-09-06 18:19

【摘要】：零件的报废绝大多数是由于零件的磨损造成的,所以材料表面的抗磨损性能在很大程度上决定了零件的使用寿命。如何提高材料的抗磨损从而达到延长零件的使用寿命是很多企业关注的重点。根据摩擦学理论,在零件表面制备一层固体润滑涂层,可以使零件的使用寿命大大增长,因为固体润滑涂层的剪切应力比较低,这层涂层可以显著地降低摩擦副的磨损情况。但是近年来随着工业工程的迅速发展,对零件表面的耐磨性能要求越来越苛刻,在喷涂涂层表面制备规则均匀的纹理造型则很好的决绝了这个问题,表面工程就是在这样的前提下被提出。本文采用超音速等离子喷涂技术、激光重熔技术和表面微造型技术的复合制备了KF301/WS2改性润滑耐磨涂层,运用激光器对涂层表面进行微造型加工,加工出凹坑、菱形、平行和间断四种表面形貌,制定合理的摩擦实验对不同纹理的涂层进行摩擦实验,研究四种不同(凹坑、菱形、平行和间断)轨迹部分激光重熔KF301/WS2润滑耐磨涂层在室温下的摩擦学特性。研究得出以下结论：(1)不同织构化图案对涂层表面摩擦因数、摩擦量有一定的影响。(2)在初始阶段时凹坑的摩擦系数为0.0085上下、菱形为0.0092、平行为0.015、断纹为0.018。(3)凹坑、菱形和平行微形貌使摩擦状态快速进入稳定期,且有效地抑制了摩擦量的波动。(4)在磨损时间为1小时时,断纹纹理的摩擦量为0.03mg,而凹坑纹理的数值在0.014mg左右。(5)摩擦学性能由高到低依次为凹坑、菱形、平行和断纹纹理。
[Abstract]:The scrap of parts is mostly caused by the wear and tear of the parts, so the wear resistance of the material surface determines the service life of the parts to a great extent. How to improve the wear resistance of materials to prolong the service life of parts is the focus of many enterprises. According to the tribology theory a layer of solid lubricating coating on the surface of the part can greatly increase the service life of the part because the shear stress of the solid lubricating coating is relatively low and the wear of the friction pair can be significantly reduced by the coating. However, with the rapid development of industrial engineering in recent years, the requirements of wear resistance on the surface of parts are becoming more and more stringent, and the uniform texture modeling on the surface of sprayed coatings is a good solution to this problem. Surface engineering is proposed under such a premise. In this paper, KF301/WS2 modified lubricating and wear resistant coatings were prepared by using supersonic plasma spraying technology, laser remelting technology and surface micro modeling technology. Parallel and discontinuous surface morphologies, a reasonable friction experiment was established for the friction experiments of coatings with different textures, and four different (pits, diamonds) were studied. Tribological characteristics of partial laser remelting KF301/WS2 lubricating and wear resistant coatings with parallel and discontinuous tracks at room temperature. The results are as follows: (1) different textured patterns have certain influence on the friction coefficient and friction amount of the coating surface. (2) at the initial stage, the friction coefficient of the pit is about 0.0085, the diamond is 0.0092, the parallel is 0.015, the fracture pattern is 0.018. (3) the pit. The diamond and parallel microtopography make the friction state enter the stable period quickly, and effectively restrain the fluctuation of the friction quantity. (4) when the wear time is 1 hour, The friction amount of broken grain is 0.03mg, while the value of pit texture is about 0.014mg. (5) the tribological properties from high to low are pit, diamond, parallel and broken texture.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TG174.4;TH117

【共引文献】