Hardening of steel axially symmetrical elements heated with two-turn inductor

This research the complex model of induction hardening of tool steel was shown. Electomagnetic phenomena, thermal phenomena and phase transformations were taken into considerations. The electromagnetic and the heat transfer equations have been solved by finite elements method by Galerkin formulations. Model of estimation of phase fractions and their kinetics has been based on the isothermal transformation diagram (TTT). Phase fractions which occur during the continuous heating and cooling (austenite, pearlite or bainite) are described by Johnson-Mehl-Avrami formula. To determine of the formed martensite the modified Koistinen-Marburger equation is used. (paper)