Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg



Qualification of Technical Ceramics as Tool Material for the Warm Forging of Steel



Project Status: finished

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Main Objective of this project is the qualification of the technical ceramic Silicium Nitride as a tool material in warm forming. For this purpose, a forward extrusion die for the production of the chassis of a constant-velocity-joint was chosen in close cooperation with industry. A FE-analysis of the process and tool design was used to calculate the local stress-strain-state of the die. The friction factor as a mean influence parameter of the FE-model was identified for different lubrication systems at the ceramic die / steel workpiece-interface by the Double-Cup-Extrusion-Test DCE-Test. Having regard to the objective friction behavior in the FE-analysis, a tooling system has been designed, which completely avoids critical tensile strains even after the warming of the tool system during the production process. The results in industrial practice are showing the potential of ceramic inserts to enhance the wear resistance of the tool and the surface quality of the workpiece.

Abstract of the final report of the project "Qualification of Technical Ceramics as Tool Material for the Warm Forging of Steel" available in German only, AiF-N° 14931 N, reporting period: 01.08.2006-31.12.2008

Acknowledgement:
This project of the Forschungsvereinigung Forschungsgesellschaft Stahlverformung e.V. FSV was funded as Project Nr. IGF 14931 N in the program "Industrielle Gemeinschaftsforschung IGF" by the Federal Ministry of Economics and Labour of Germany under coordination from the Federation of Industrial Research Associations .Otto von Guericke. AiF.

The final report is available in German only and can be ordered by:

Forschungsgesellschaft Stahlverformung e.V.
Goldene Pforte 1
D-58093 Hagen


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Letztes Update: 01.01.2010