Center of excellence in research 483

Teilprojekt A7

Ceramic tools for metal working: rolls for wires

Prof. Dr. rer. nat. Peter Gumbsch
Institut für Institut für Zuverlässigkeit von Bauteilen und Systemen (IZBS)
Karlsruher Institut für Technologie 

Dr. rer. nat. Andreas Kailer
Fraunhofer-Institut für Werkstoffmechanik IWM

Teilprojekt A7

Ceramic-based materials are gaining technological and economical importance in the field of metal forming. Nonetheless, producing tools with high durability and narrow dimensional tolerances is still a topic of research. Project “A7” is the system-project of the “Rolling Systems” workgroup within the framework of the Collaborative Research Centre DFG SFB-483 “High performance sliding and friction systems based on advanced ceramics”.

The main objective of this project is to further investigate and elaborate existing damage models for silicon nitride wire-rolling tools. The target is to determine the most crucial working parameters and influencing material properties that affect the tools functionality and durability in the field of application, and consequently setting guidelines on how to expand the lifetime of the ceramic-based tools by avoiding damage-influencing factors. This work also concentrates on determining the dominant thermomechanical and tribological loading conditions encountered in rolling high-strength steel wires as well as studying adhesion characteristics between the metal and the ceramic work-roll.