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Combination of Hot Forming with CRP and Rapid Cooling to Obtain Enhanced Formability in Thermomechanical Treatment

Published online by Cambridge University Press:  15 February 2017

Peter Birnbaum ,
Markus Baumann ,
Andreas Kunke ,
Verena Kraeusel  and
Dirk Landgrebe
Peter Birnbaum*
Affiliation:
Professorship for Forming and Joining, Technische Universität Chemnitz, Chemnitz, Germany.
Markus Baumann
Affiliation:
Professorship for Forming and Joining, Technische Universität Chemnitz, Chemnitz, Germany.
Andreas Kunke
Affiliation:
Professorship for Forming and Joining, Technische Universität Chemnitz, Chemnitz, Germany.
Verena Kraeusel
Affiliation:
Professorship for Forming and Joining, Technische Universität Chemnitz, Chemnitz, Germany.
Dirk Landgrebe
Affiliation:
Professorship for Forming and Joining, Technische Universität Chemnitz, Chemnitz, Germany. Fraunhofer Institute for Machine Tools and Forming Technology IWU, Chemnitz, Germany.
*
*(Email: peter.birnbaum@mb.tu-chemnitz.de)
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Abstract

In sheet metal forming, rapid cooling of austenitized steel and CRP (cushion-ram pulsation) results in an optimized formability. An analysis is conducted regarding the influence of a stepwise deep drawing process of manganese-boron steel 22MnB5, using an oscillating ram-cushion motion at simultaneous cooling. The stops occurring in stepwise forming provide sufficient time for softening and recovery of forming properties. The microstructure can be adjusted by controlled cooling. In order to examine the newly developed process in more detail, FE simulation is applied. Thus, relevant process and material parameters can be determined. The considered values are required for profound experiments using the forming simulator BAEHR DIL 805 A/D. The softening behavior at defined forming temperatures due to CRP are examined. The experimental results of softening at distinctive temperatures provide a basis for the combined processes of stepwise hot sheet metal forming and simultaneous cooling.

Keywords

steelstress/strain relationshiphardness
Type
Articles
Information
MRS Advances , Volume 2 , Issue 17: Processing and Manufacturing , 2017 , pp. 957 - 962
Copyright
Copyright © Materials Research Society 2017 

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References

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