Effect of Austempering Treatment on Microstructure and Mechanical Properties of M50NiL Bearing Steel

An Industrial-Scale Study of the Hardness and Microstructural Effects of Isothermal Heat Treatment Parameters on EN 100CrMo7 Bearing Steel

“…Conversely, at the surface, an entirely upper bainitic microstructure has been observed (Figure 12a,c). In addition, the most important contribution to the bainite volume fraction and hardness is related to austempering temperature rather than austempering time, as reported in the literature for bearing steels [15,36]. This issue has been stressed in a previous study by the authors [37] and, in the present investigation, it has been further assessed.…”