P 805 - Use of induction heating and determination of the corresponding process windows for press hardening

The homogeneous heating of the blank was achieved using a meandering inductor and an oscillating, translational movement of the blank. The temperature difference within the entire blank could be reduced to approx. 40 K, so that no significant differences in the selected mechanical properties could be determined after press hardening. Furthermore, to determine the limits of the new rapid heating process, a process window was determined by varying the heating temperatures and holding times. It was shown that by heating the material used, 22MnB5, to 900 °C within 20s without additional holding time, mechanical properties comparable to those of the conventional furnace method can be achieved. A final economic analysis showed that induction heating leads to lower production costs. However, it should be noted that the proportion of heating costs in the total component costs is relatively low. The IGF project 16319 N of FOSTA - Forschungsvereinigung Stahlanwendung e.V., Düsseldorf, was funded via the AiF within the framework of the programme for the promotion of joint industrial research and development (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a resolution of the German Bundestag. The project was carried out at the Chair of Lightweight Automotive Engineering at Paderborn University.