Improvement of the tribological properties of steels can be achieved by increasing the hardness of the surface and by reducing roughness and the coefficient of friction. The formation of composite layers on steel, consisting of a hard nitrided or nitrocarburised diffusion layer and an external carbon coating with a low coefficient of friction, seems to be a prospective solution with significant potential. The paper presents an innovative method of producing carbon-based coatings on diffusion layers by means of a low-temperature process utilizing a single device for glow-discharge treatment. 316L austenitic stainless steel, one of the most popular and most readily available single-phase steels, was used in the tests. The layers have been formed in successive processes of nitriding or nitrocarburising in low-temperature plasma followed by deposition of a nitrogen-doped carbon coating under DC glow-discharge conditions. An evaluation was made of the impact of the nitrided and nitrocarburized layers on the properties and morphology of the carbon coatings formed, by comparing them to a coating produced on unpretreated steel substrates. A study of the surface topography, roughness, nanohardness, coefficient of friction, wear, adhesion and corrosion resistance shows a significant importance of the substrate type the coatings are formed on.

可以通过提高表面硬度并降低粗糙度和摩擦系数来提高钢的摩擦学性能。在钢上形成由硬氮化或氮碳共渗的扩散层和低摩擦系数的外部碳涂层组成的复合层似乎是具有巨大潜力的前瞻性解决方案。本文提出了一种创新的方法，该方法通过利用单个装置进行辉光放电处理的低温工艺在扩散层上生产碳基涂层。测试中使用了316L奥氏体不锈钢，这是最流行和最容易获得的单相钢之一。这些层是在连续的低温等离子体氮化或氮碳共渗过程中形成的，然后在直流辉光放电条件下沉积氮掺杂碳涂层。通过将氮化层和氮碳共渗层与未预处理的钢基材上产生的涂层进行比较，评估了氮化层和氮碳共渗层对所形成的碳涂层的性能和形态的影响。对表面形貌，粗糙度，纳米硬度，摩擦系数，磨损，附着力和耐腐蚀性的研究表明，形成涂层的基材类型非常重要。通过将它们与未预处理的钢基材上产生的涂层进行比较。对表面形貌，粗糙度，纳米硬度，摩擦系数，磨损，附着力和耐腐蚀性的研究表明，形成涂层的基材类型非常重要。通过将它们与未预处理的钢基材上产生的涂层进行比较。对表面形貌，粗糙度，纳米硬度，摩擦系数，磨损，附着力和耐腐蚀性的研究表明，形成涂层的基材类型非常重要。