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为降低纯镍基合金涂层在高接触应力下的摩擦因数并进一步提高其耐磨性能,运用等离子喷涂技术在45#钢表面制备石墨/TiC协同改性镍基合金复合涂层。结果表明:复合涂层的摩擦因数较纯镍基合金涂层降低47.45%,磨损质量降低59.1%。纯镍基合金涂层与GCr15钢对摩时,表面产生明显的滑移和粘着变形,从而使纯镍基合金涂层表现出多次塑变磨损和粘着磨损。在复合涂层的磨损表面形成较软的、富含石墨和铁氧化物的转移层,使得其摩擦因数显著降低,质量磨损大为减少。复合涂层的磨损机理主要为转移层的疲劳剥落。
In order to reduce the friction coefficient of pure Ni-based alloy coating under high contact stress and further improve its wear resistance, a graphite / TiC co-modified Ni-based alloy composite coating was prepared on the surface of 45 # steel by plasma spray technique. The results show that the friction coefficient of the composite coating is reduced by 47.45% and the wear quality is reduced by 59.1% compared with the pure nickel-based alloy coating. Pure nickel-based alloy coating with GCr15 steel friction, the surface of a significant slip and adhesion deformation, so that the pure nickel-based alloy coating showed multiple plastic deformation wear and adhesion wear. The composite coating on the wear surface to form a soft, graphite and iron oxide-rich transfer layer, making it significantly reduced the friction coefficient, mass wear greatly reduced. The wear mechanism of the composite coating is mainly the spalling of the transfer layer.