Effect of Cold Ring Rolling on the Wear Resistance of GCr15 Bearing Steel after Quenching and Tempering

Abstract

In this work, the effects on dry wear behavior of cold ring rolling (CRR) of GCr15 bearing steel, after quenching and tempering (QT) heat treatment are investigated. The effects on steel microstructures and wear mechanisms of CRR with different austenitizing times are also discussed. The results show that, with a short austenitizing time of 10 min, CRR can increase the retained austenite content, decrease the undissolved carbide content and improve the hardness of the specimen, thus reducing ploughing and fatigue flaking, and decreasing the wear loss of the CRR specimen. With the longer austenitizing time of 20 min, the retained austenite content increases, the undissolved carbide content decreases, and the hardness increases significantly, both in specimens with and without CRR, so that ploughing, fatigue flaking, and wear loss can all be decreased. However, with an austenitizing time of less than 20 min, the effects of CRR on retained austenite content, undissolved carbide content, and hardness are not significant. Thus, CRR of less than 20 min cannot further improve wear morphology or decrease wear loss.

Effect of Hot Rolling on Microstructural Evolution and Wear Behaviors of G20CrNi2MoA Bearing Steel

“…Previous experiments have confirmed the significant effect of cold ring rolling on the microstructural evolution of GCr15 bearing steel during quenching and tempering [23]. The main reason for this effect is that the deformed initial microstructures lead to the refinement of austenite grains and the accelerated dissolution of carbides in the subsequent austenitization step [24], thus affecting the microstructure transformation during quenching and tempering [25,26].…”

Effect of laser remelting power on the microstructure and properties of vanadizing layer on AISI 52100 steel pin shaft

“…AISI 52100 steel has high hardness, high strength, good wear resistance and high contact fatigue strength after quenching and tempering. Because of its good performance, it is often used to manufacture molds and precision measuring tools [ [1] , [2] , [3] , [4] ]. AISI 52100 steel is one of the most widely used materials in the field of bearin, however, after traditional heat treatment, the transformation of retained austenite to untempered martensite will occur in the process of long-term service of AISI 52100 steel, resulting in problems such as reduced hardness, loss of precision and decreased fatigue life [ [5] , [6] , [7] ].…”

Effect of prior cold rolling on the dry wear performance of GCr15 bearing steel with multiphase microsturcture

“…They proposed that an increase in deformation degree led to the improvement of thermal stability and mechanical stability of residual austenite,which further improved wear resistance. Lu et al [17], proposed that cold rolling deformation reduced the size of grains and undissolved carbides after quenching and tempering, resulting in an increase in matrix hardness. In addition, Li et al [18], found that 30% of cold deformation significantly refined the previous austenite grains, thus improving the impact toughness of the martensitic microstructure.…”