POSSIBILITY OF INTRODUCING MOLYBDENUM DISULFIDE INTOTHE LAYER DURING GAS NITRIDING

The aim of this study was to attempt the introduction of molybdenum disulfide as an excellent solid lubricantinto the nitrided coating before the nitriding process. In the commonly applied methods, nitriding precedesdepositing MoS2 powder on a surface.In the method described in the article, this order was reversed and the surface intended for frictional contactwas first coated with a layer of MoS2 powder and then subjected to gas nitriding in an ammonia atmosphere.The most important observations indicate that the presence of MoS2 on the surface before nitriding did nothinder the thermochemical treatment, and the applied molybdenum disulfide powder was transferred to thesurface layer after nitriding. Some of the MoS2 powder was embedded in the upper regions of the white layer,and the presence of some powder was found on the surface of the nitrided layer. Such a result obtained inthe new technological variant is a desirable circumstance that allows for better utilization of the lubricatingproperties of the new coating.