Abstract
Parts made of press-hardened steel are cut in general by laser cutting. Shear cutting at room temperature of materials with a tensile strength above 1,500 MPa is not an alternative due to insufficient tool life quantity. The presented investigation relates to the hot cutting of press-hardenable materials such as 22MnB5 and 34MnB5 and includes the determination of the cutting parameters (measuring rate of 100,000 Hz), the temperature, the formation of the microstructure, and the dimensional accuracy of the cut parts during different heat treatments. The results of this investigation show that, when comparing two process routes, the maximum cutting force was reduced to approximately 70 % when cutting in the austenitic range, the acceleration during the cutting impact was close to zero and the deviations from the target geometry were very small. With regard to the measurement results, hot cutting can be an alternative to laser cutting.
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Acknowledgments
The authors acknowledge Salzgitter Flachstahl GmbH, especially Dr. Stefan Mütze, for providing the 34MnB5 material and acknowledge AWEBA Werkzeugbau GmbH Aue, especially Dipl.-Ing Thomas Aurich, for providing the cutting tool.
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© 2021 The Minerals, Metals & Materials Society
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Schmidt, R., Rautenstrauch, A., Kräusel, V. (2021). Hot Cutting of Press-Hardened Parts in Different Heat Treatment Regimes. In: Daehn, G., Cao, J., Kinsey, B., Tekkaya, E., Vivek, A., Yoshida, Y. (eds) Forming the Future. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-75381-8_139
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DOI: https://doi.org/10.1007/978-3-030-75381-8_139
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