Study on Tribological Properties of Ion Sulfuration and Thermal Sprayed FeS Solid Lubrication Layers

The methods of low temperature ion sulfuration and thermal sprayed were used to prepare the FeS solid lubrication layers respectively Their tribological properties were comparatively investigated on a ball on disc friction and wear tester of QP 100 model under oil lubrication SEM equipped with EDX and XRD were employed to analyze the morphologies of surface and wear scar of FeS layers, and the surfaces phase structures The results show that the tribological properties of two layers are all superior to the plain surface, in which the friction reduction and wear resistance of the ion sulfuration layer are still better, and the property of anti scuffing of the sprayed FeS is better The difference of the tribological properties of two layers is due to their different forming mechanisms and structures The ion sulfuration layer is prepared in the vacuum furnace and is formed through the diffusion and penetration of sulfurs into the matrix The bond between the layer and substrate is chemical bond The layer is thin and successive The sprayed FeS layer is prepared in atmosphere and forms through the building up of FeS grains It belongs to mechanical bond The layer was thick and contained some impurities