Study On Friction And Wear Properties Of Ni/C Self-lubricanting Coating

The article selected Ni/C, adopted plasma spraying and oxy-acethlene flame spraying to make SL coating, adopt pull-extend test to measure the combination intension,optimize to design different technics parameter by orthogonal test,measure coating density,porosity; worn surfaces, composition and morphology of debris of the composite samples were analyzed by scanning electron microscope(SEM) and X-ray diffraction(XRD),the wear properties and wear mechanisms were investigated in the temperature range of room temperature.Under dry friction,the results showed that, along with rotate speed was high, the friction factor of Ni/C SL coating was calm firstly under a certain load, then change ranged and the ratio of wear and tear augmented. Under a certain rotate speed, along with load increases, the friction factor of coating diminished firstly, then increased finally, the ratio of wear augmented gradually.The analysis of wear appearance showed that, Wear mechanism of Ni/C SL coating were mainly grain wear, adherence wear, and along with fatigue crackle,nubby fatigue pit which falked and little oxidation wear.Self-lubricanting coating made by technology of hot spraying can rebulid attrited parts, the cost is lower, the operation is convenient, the efficiency of rehab is higher and the effect is better.Solid lubricant was joined the metal-matrix to form Self-lubricanting coating as suit, can form lubricant film when the two frictional surfaces occurred diversion friction, and wear properties of Ni/C self-lubricanting coating received improved evidently. Compared to 45# steal under dry friction, Ni/C self-lubricanting coating showed better property which minishes friction.Ni/C self-lubricanting material not only has favorable mechanical property, wearable property of the metal , but also has excellent lubricant property and property which minishes friction of graphite, and applies to many products, including axletree, hermetic ring, axletree frame, gear, piston, piston ring and so on, it is a new type of self-lubricanting material which has better applied foreground.The article has certain theroy significance and applied reference value for the study and application of the friction and wear properties of self-lubricanting coating in the future.