Lifetime Comparison of Different Hot Work Tool Steels for Extrusion Tools in Aluminum Extrusion
Christof Sommitsch, Friedrich Krumphals, Christoph Stotter, Dominik Dendl, Thomas Wlanis and Daniel Huber, Christian Doppler Laboratory for Materials Modelling and Simulation, University of Leoben, Austria
Christian Redl, Böhler Edelstahl GmbH & Co KG, Kapfenberg, Austria
Track: EXTRUSION/DIE, THEORETICAL - Dies and Modeling
ABSTRACT --- Extrusion tools are exposed to severe thermomechanical loads,
which can lead to materials damage and finally to tool failure. For a realistic
estimation of the lifetime of container and die by the finite element method, a
constitutive model was coupled with a damage model. Thus an inelastic strain as
well as the lifetime consumption results as a function of temperature and stress
history. The boundary conditions of the finite element simulation were
determined by an experimental extrusion device, whereby the stresses at the
contact area tool-billet, as well as the temperatures in the tools during billet on
billet extrusion were measured and compared with the numeric results.
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