Effect of Quenching Media on Wear Resistance of AISI 52100 Bearing Steel Alloy

Abstract

A study has been made to evaluate wear behavior of AISI 52100 steel underdifferent quenching media. This investigation was accomplished by two stages. Inthe first stage of the study , quenching treatment was applied to the steel alloy andthen cooling was carried out in various media (Oil , Polyvinyl Alcohol , Glycerol),and finally low temperature tempering (200Co) was applied to the quenchedsamples to eliminate internal stresses after transformation from austenizationtemperature to the temperature which the samples were cooled. Microstructuralexamination was achieve using light microscopic for all heat treated specimens aftermetallographic preparations . In the second stage , pin - on - disk technique wasused to determine the wear rate of the treated specimens depending on weight lossmethod . Worn surfaces of the steels were examined using light microscopic tocharacterize the topography of the surfaces.The results exhibited that (i) Martensitic matrices with retained austenite can beobtained depending on the quenching medium . (ii) Chromium carbides have beenprecipitated as a result of quenching heat treatment in different quenchants . (iii)Quenching in oil and then tempering revealed wear resistance more than otherquenchants . (iv) wear cracks were presented on the worn surfaces of the steelswhich was used in this work .