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利用大气等离子喷涂在不锈钢表面制备PS304高温自润滑涂层。采用X射线衍射仪、扫描电子显微镜表征涂层的组成和结构;采用SRV微动摩擦磨损实验机研究PS304涂层和Si3N4摩擦副从室温到800℃的摩擦磨损性能;用扫描电子显微镜观察涂层和对偶球的磨损形貌,并分析涂层在室温和600℃的摩擦磨损机制。结果表明,常温下,涂层的摩擦因数和磨损率均较高,磨损表面伴随脆性断裂迹象,主要表现为磨粒磨损机制。在600℃下,涂层表现最低的摩擦因数和最小磨损率,其表面形成润滑膜并发生一定的塑性变形,磨损机制主要为黏着磨损。
Preparation of PS304 High Temperature Self-Lubricating Coating on Stainless Steel by Atmospheric Plasma Spraying. The composition and structure of the coatings were characterized by X-ray diffraction and scanning electron microscopy. The friction and wear properties of PS304 and Si3N4 friction pairs from room temperature to 800 ℃ were investigated by SRV fretting friction and wear testing machine. The coatings were observed by scanning electron microscopy And the dual ball wear morphology, and analysis of the coating at room temperature and 600 ℃ friction and wear mechanism. The results show that at room temperature, the friction coefficient and wear rate of the coating are high, and the wear surface is accompanied by brittle fracture, which is mainly manifested as abrasive wear mechanism. At 600 ℃, the coating showed the lowest friction factor and the lowest wear rate, the surface of the lubricating film formed and a certain degree of plastic deformation, the wear mechanism is mainly adhesive wear.