Affiliations: [a] Institute of Electrotechnology, Leibniz University of
Hannover, Hannover, Germany | [b] Department of Electrotechnology and Converter
Engineering, Petersburg, Russia | [c] Daimler AG, Technology Management TransAxle, Kassel, Germany | [d] Institute of Materials Science, Leibniz University of
Hannover, Garbsen, Germany | Leibniz University of Hannover, Hannover, Germany | University of Pavia, Pavia, Italy | University of Padua, Padua, Italy
Correspondence:
[*]
Corresponding author: D. Schlesselmann, Institute of
Electrotechnology, Leibniz University of Hannover, Wilhelm-Busch-Str. 4, 30167
Hannover, Germany. Tel.: +49 511 762 2290; Fax: +49 511 762 3275; E-mail:
schlesselmann@etp.uni-hannover.de
Abstract: In the present paper, a new numerical model for calculating
martensite microstructure in induction surface hardening processes is
introduced. The model was developed with the help of the Department of
Electrotechnology and Converter Engineering (LETI). It takes into account the
heating as well as the quenching process and uses the temperature history of a
work piece to calculate martensite formation. The calculation is based on an
empirical equation found by Koistinen and Marburger [1]. A comparison between
the heat distribution within a work piece at the end of the heating process and
the distribution of martensite after quenching is performed for different
process parameters. Thus, it is determined, in which case the temperature
distribution is sufficient to predict the hardened layer and in which case the
microstructure has to be calculated to receive accurate results. The model is
verified by comparing simulation results with different experiments.
