Graduate School

Transfer project T-B5: Processdevelopment of inductive dual frequence surface hardening by numerical modeling

Person in Charge: Dipl.-Ing. Bernhard Kaufmann
  Motivation and aims:
Today inductive dual frequency surface hardening is an innovative, established heat treatment process. Nevertheless, the development of this complex process for industrial application is associated by a huge number of experiments. Numerical models are used to get a better knowledge of the process in itself and to shorten and optimize the development procedure. The aim of transfer project T-B5 is to improve the numerical model, which has been implemented in project B5, with regard to the material- and process model and the utilization in the context of industrial process development at the transfer partner Robert Bosch GmbH.
 Investigations First Results  
  • Numerical Model of dual frequency induction hardening with finite elements
  • Implementation of a material model describing the material behavior (based on results of project B5)
  • Thermal analysis with a dilatometer and a short time austenitization test engine
  • Induction hardening of gears (42CrMo4) at the transfer partner Robert Bosch GmbH
  • Characterization of  material state at the surface by optical analysis of the microstructure, measurement of eigenstresses  and micro hardness
  • ecological and economic balance of dual frequency surface hardening
  • Implementation in ABAQUS 6.11
  • Transfer of the existing material model for 2D-simulation into 3D-simulation
  • First steps towards a 3D numerical  model of the induction heat treatment of gears

  • Induction hardening of gears
  • First characterization of the material state in the surface of the hardened gears