Press Hardening of Tubes with Additional Interior Spray Cooling

Press-hardened profiles are used e.g. for automotive applications in order to improve light weight construction due to the high reachable strength. The application of interior water-air spray cooling contributes to significantly reducing the cycle time in the production of heat-treated tubes. This paper describes a new manufacturing method for producing press-hardened hollow profiles by means of an additional interior cooling based on a water-air spray. Furthermore, this paper provides the results of thorough investigations on the properties of press-hardened tubes in dependence of varying spray parameters.

Authors:

• B.-A. Behrens
• H. J. Maier
• A. Neumann
• J. Moritz
• S. Hübner
• T. Gretzki
• F. Nürnberger
• A. Spiekermeier

Keywords:

• 22MnB5
• hollow profiles
• press hardening
• tubes
• water-air spray cooling.

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