Rolling Contact Fatigue Property of Low-Temperature Bainite in Surface Layer of a Low Carbon Steel
Rolling contact fatigue (RCF) properties of low-temperature bainitic microstructure in the surface layer of a low-carbon steel, obtained by means of carburization and successive lowtemperature austempering were studied. Comparisons were made with those properties of a martensite steel obtained by quenching and tempering. The results showed that the low-temperature bainitic steel exhibits an excellent RCF resistance and reaches a RCF life more than twice that of the martensite steel, presumably as a consequence of the very thin bainite plates (~80 nm in thickness) and the fine-scale dispersion of austenite between the plates. The apparently increased hardness in the surface layer may partly be the cause of the enhanced RCF resistance.
Yi Tan and Dongying Ju
P. Zhang et al., "Rolling Contact Fatigue Property of Low-Temperature Bainite in Surface Layer of a Low Carbon Steel", Materials Science Forum, Vols. 675-677, pp. 585-588, 2011