The Study on New Generation Coating Technology for improvement of Friction and Wear Properties of The Railway Wheel

Abstract

Railway wheel is carried out film coating for prevention of "climbing derailment". Properties of DLC (Diamond Like Carbon) film are low friction and high hardness. DLC film showed good film properties in the test piece level. Then, model wheel coated with DLC film by UBMS (UnBalanced Magnetron Sputtering) was evaluated friction and wear properties on Twin-Disc Rolling Contact Testing Machine. Model wheel coated with DLC-Nitriding layer kept low traction in three kinds of environments respectively. In addition, the contact stress was diffused by the hardness inclination that the nitriding layer brought about, the delamination was not confirmed between the substrate and this film.