Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Characterization and specification of the frictional behavior of the direct and partial press hardening process

Project Status: finished


The aim of this research project is to characterize the tribological conditions in warm forming processes of high strength steels and to use the gained results for the development and the integration of a time- and location-dependent friction model in commercial finite element software. The high strength steel 22MnB5 can be formed with the hot forming process direct press hardening into complex components with very high tensile strength. The forming process is well established in light weight construction in the automotive industry.

In this research project an experimental test rig is to be developed and will be built in order to analyze the frictional behavior within press hardening processes. The test rig will enable to measure the coefficient of friction μ for process relevant parameters like for example sheet temperature. Simulations show how heating the sledge prevents from an unwanted high temperature drop of the preheated sheet strip during the experiment.



Simulation of the sheet temperature for four sledge temperatures; operation principle strip drawing test




Research Groups



    • Schwingenschlögl, P.; Tenner (geb. Steiner), J.; Andreas, K.; Merklein, M.:
      Investigation of Tribological Conditions within Partial Hot Stamping.
      In: Steinhoff, K.; Oldenburg, M.; Prakash, B. (Edtrs.): Hot Sheet Metal Forming of high-Performance Steel - CHS2, Wissenschaftliche Skripten, 2017, pp. 233-240

    • Schwingenschlögl, P.; Tenner (geb. Steiner), J.; Andreas, K.; Merklein, M.:
      Tribological behavior of Zn coated 22MnB5 in hot stamping.
      In: (Edtr.): Steels in Cars and Trucks, 2017, published

    • Schwingenschlögl, P.; Weldi, M.; Merklein, M.:
      Investigation of the influence of process parameters on adhesive wear under hot stamping conditions.
      In: (Edtr.): Journal of Physics: Conference Series, 2017, published


    • Schwingenschlögl, P.; Hildering, S.; Merklein, M.:
      Investigation of Friction Conditions at Elevated Temperatures for Hot Stamping.
      In: Thai Tribology Association (TTA) (Edtr.): Proceedings 7th International Conference on Tribology in Manufacturing Processes, 2016, pp. 217 - 228

    • Schwingenschlögl, P.; Tenner (geb. Steiner), J.; Gauglitz, S.; Merklein, M.:
      Einfluss der Werkzeugtemperatur auf die tribologischen Bedingungen beim Presshärten.
      In: Merklein, M. (Edtr.): 11. Erlanger Workshop Warmblechumformung, Meisenbach Bamberg, 2016, pp. 45 - 62


    • Schwingenschlögl, P.; Hildering, S.; Merklein, M.:
      Characterization and Description of Friction Conditions for Hot Stamping and Partial Hot Stamping of Ultra High Strength Steel.
      In: Stahl-Institut VDEh (Edtr.): Proceedings METEC & 2nd ESTAD, 2015, pp. 1-6

    • Schwingenschlögl, P.; Hildering, S.; Merklein, M.:
      Untersuchung der Reibbedingungen beim Presshärten mittels Streifenziehversuchen bei erhöhten Temperaturen.
      In: M. Merklein (Edtr.): 10. Erlanger Workshop Warmblechumformung, Meisenbach, 2015, pp. 177-194


    • Merklein, M.; Wieland, M.; Fell, R.:
      Tribological conditions within hot stamping process.
      In: Prof.Dr. Ton van den Boogaard (Edtr.): Proc. of 7th Forming Technology Forum - Warm and Hot Forming, Faculty of Engineering Technology, University of Twente, Enschede, the Netherlands, 2014, pp. 33-40

    Letztes Update: 06.09.2016