Microstructure and tribological properties of composite FeCrBSi/FeS layer

Abstract

Solid lubrication composite FeCrBSi/FeS layer was prepared by compound technology -combining supersonic velocity plasma spray with low-temperature ion sulphurizing. X-ray diffraction pattern for the composite layer implied that the layer mainly consists of α-Fe and FeS. Scanning electron microscopy was used to observe the surface, cross-section, and worn scar morphologies of the FeCrBSi/FeS layer. The nano-hardness and elastic modulus of the layer were surveyed by a nano-indentation tester. The sliding tribological behaviour of the FeCrBSi/FeS layer and the original 1045 steel against 52 100 steel counterparts was studied under dry and oil lubrication conditions by ball-on-disc tests. The experimental results showed that the composite FeCrBSi/FeS layer exhibited remarkable friction-reducing effects and obvious wear resistance under dry and oil lubrication conditions.

Structure and Tribological Behaviors of Synthetic MoS₂ Film Prepared by a Novel Compound Method

“…The lubricating property of the MoS 2 should be probably attributed to the hardness of the synthetic MoS 2 film, which is higher than that of the FeS film. In addition, the FeS film is porous [10][11], which accelerates the wear process due to a severe stress concentration at pore edges. MoS 2 possesses close-packed hexagonal structure, it can easily slip along the close-packed plane, which attributes to its low friction coefficient.…”

Microstructure and phase composition of Fe-based self-fluxing alloy coatings formed by laser remelting and superficially modified by laser alloying with B4C particulates

“…The Ni-and Co-based self-fluxing alloys have very good overall properties but their main disadvantage is the high cost. If the properties of Fe-based alloys were enhanced, the Ni-based self fluxing alloys would be replaced by Fe-based alloys which have a high wear resistance and are relatively cheap [11,14,15].…”

“…It was found that the FeCrBSi/FeS composite layer exhibited frictionreducing effects and an obvious wear resistance in different lubricant conditions in comparison with 1045 steel. Fe-based self-fluxing alloys have a good corrosion resistance and make it possible to obtain a multiphase structure combining a finely dispersed eutectic with a low hardness and an iron borocarbide hard phase, which is the optimum for rubbing pairs operating with high loads and sliding speeds [14].…”

Preparation and Characterization of FeS Film by Low Temperature Ion Sulfurizing Technique

“…Comparing with other sulfurizing techniques, low temperature ion sulfurizing technique has lots of merits, such as pollution-free, easy preparation, low cost, and good tribological properties. Moreover, the low temperature ion sulfurizing technique has no influence on the original rigidity, shape, precision of workpieces [7][8][9]. Therefore, low temperature ion sulfurizing is used widely in many industrial field including metallurgy, automobile vehicle, textile, pillow, roller, cutter, cylinder bush and piston ring of engine.…”