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为了拓展所制备的镍基自润滑耐磨复合涂层的应用领域,基于前期研究基础,在HT-1000型高温摩擦磨损试验机研究涂层在300℃不同载荷下的摩擦磨损行为,利用SEM和EDS对磨损表面进行了形貌观察与成分分析,研究其摩擦磨损机理。结果表明:该复合涂层的摩擦系数及磨损率都随着载荷的增大呈现先减小后略增大的趋势;当载荷较低(2 N)时,涂层的磨损表面出现少量分散的磨屑;在中等载荷(5 N)下,磨损表面光滑平整,涂层中的润滑颗粒被挤压出磨损表面形成润滑膜,导致涂层具有良好摩擦磨损性能;随着载荷的增大,达到10 N时,磨损表面出现犁沟及部分由于硬质相碳化物和润滑颗粒剥落而形成的凹坑。
In order to extend the application fields of the prepared Ni-based self-lubricating and wear-resistant composite coatings, based on the previous research, the friction and wear behavior of the coatings under different loads at 300 ℃ were investigated by HT-1000 high temperature friction and wear tester. EDS on the wear surface morphological observation and composition analysis, study its friction and wear mechanism. The results show that the friction coefficient and the wear rate of the composite coatings decrease first and then increase slightly with the increase of the load. When the load is low (2 N), the wear surface of the coating appears a little dispersion Wear debris; Under medium load (5 N), the wear surface is smooth and smooth, the lubricating particles in the coating are squeezed out of the wear surface to form a lubricating film, resulting in the coating having good friction and wear properties; as the load increases, reaching At 10 N, the furrows appeared on the worn surface and partly due to the delamination of hard phase carbides and lubricating particles.