Due to the great interest of the automotive industry and the ever increasing demand for press hardened components , the process has been in the focus of science for several years.
Also the FOSTA e. V. addressed this topic early on, initiating and accompanying numerous precompetitive research projects to date. The design of a process window for press hardening was fundamentally investigated in the framework of the FOSTA project P 644. Another FOSTA project (P 709) has been dealing with the realisation of functionally optimised components using Tailor Welded Blanks during press hardening. Further fundamental investigations concerning the tribological conditions in press hardening, which have a great influence on the forming behavior due to high thermo-mechanical stress, were carried out in the FOSTA project P 871. In the FOSTA project P 902, the combination of hydroforming and press hardening took place. It showed that formless solids represent a potential alternative to gaseous active media. To determine the optimal removal time of the component and the more economical design of the process, a tactile temperature sensor based on thin film technology was developed in the FOSTA project P 1065. Current projects include the qualification of the shear cutting as a manufacturing process for the trimming of ultra-high strength chromium steels, which represent a possible alternative to conventionally used 22MnB5 (P 1222) and the tool-side influence on the tribological conditions during press hardening (P 1228). In addition, in project P 1238, locally thinned areas are to be incorporated into the component in order to improve their joinability.
Thus, the FOSTA e. V., with its supervised research projects, makes a decisive contribution to the further development of press hardening of ultra-high strength steels.
Marion Merklein, Bernd-Arno Behrens, A. Erman Tekkaya
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