TRIBOTECHNICAL CHARACTERISTICS OF DISPERSION NITRIVANADIUM-STRENGTHENED STEELS

Abstract

Analysis of anti-friction, anti-oil and energy characteristics of wheeled and rail steels was carried out. The positive effect of microleague technology of vanadium and nitrogen on the tribotechnical characteristics of the wheeled steel has been established. Dispersion nitridanadium strengthened steel is characterized by a decrease in the specific operation of friction by 1.8 times, compared with the period of bedding, indicating an effective structural adaptability of this steel in non-stationary friction conditions during bedding of 3%. The processes of structural adaptability of nitridanadium strengthened wheel steel from the positions of mechano-and-physical aswell as chemical processes occurring with the absorption of energy by surface and near-surface metal layers are considered. For the studied wheeled steel, the capture of the contact surfaces is not established, the surface layers of metal after working 130 cycles are characterized, preferably strengthening (δ H100 = 680 MPa), only, on average, by 15% of the surface area, plots with severe layers are recorded. It has been established that as a result of effective structural adaptability to dynamic load conditions, dispersion nitridanadieviously strengthened wheeled steel, counterattack, which was selected by rail steel, also manifests increased wear resistance - its linear wear is 3.9 times less, compared to working conditions in triberal standard wheeled steel.