Retained austenite is the second phase in volume fraction of quenched steel, after martensite. During tempering of steels, the retained austenite decomposition kinetics (Stage 2) is of special importance, as the formation of ferrite and cementite leads to an increase in volume. Induction Heating (IH) heat treatment of bearing steel is gaining in popularity, allowing quick treatment and being a clean and safe process. Both quench and tempering treatment are considered to be performed using IH. Kinetics of Stage 2 is known through dilatometry and salt bath tempering experiments [1-3]. It would be of interest to confirm the kinetics during non-isothermal, high temperature, short time IH tempering, in order to use it in simulations.
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