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Utilization of Experimental Data as Boundary Conditions for the Solidification Model Tempsimu-3D

Verwendung von experimentellen Daten als Randbedingungen für das Erstarrungsmodell Tempsimu-3D

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Abstract

Solidification models are an important tool for the prediction of temperatures and shell growth during the process of continuous casting of steel. To gain reliable simulation results, it is crucial to use highly sophisticated material data and boundary conditions depending on different process parameters. The focus of this work lies on the utilization of experimental data to describe the secondary cooling zone (SCZ) of a slab caster in the solidification model Tempsimu-3D. In this part of the caster, water and air-mist sprays are used to cool down the strand. To calculate the heat transfer coefficient caused by spray cooling (HTCspray), the model uses a correlation between the water impact density (WID) and the surface temperature of the slab. Together with the heat removal due to roll contact and radiation, this HTCspray is applied as a boundary condition for the SCZ. To adjust the parameters of the correlation formula, results from WID and HTC measurements are used. For validation, the simulation results are compared with a measurement of the slab surface temperature.

Zusammenfassung

Erstarrungsmodelle sind ein wichtiges Werkzeug für die Vorhersage von Temperatur und Schalenwachstum beim Stranggießen von Stahl. Um verlässliche Simulationsergebnisse zu erhalten, werden akkurate Materialdaten und Randbedingungen in Abhängigkeit der verwendeten Prozessparameter benötigt. Der Fokus dieses Beitrags liegt auf der Aufbereitung von experimentellen Daten zur Beschreibung der Sekundärkühlzone einer Brammenstranggießanlage im Erstarrungsmodell Tempsimu-3D. In diesem Anlagenteil werden Ein- und Zweistoffdüsen eingesetzt, um den Strang kontrolliert abzukühlen. Zur Berechnung des Wärmeübergangskoeffizienten durch Spritzwasserkühlung (HTCspray) verwendet das Modell eine Korrelation aus Wasserbeaufschlagungsdichte (WID) und Oberflächentemperatur. Dieser HTCspray wird zusammen mit der Wärmeabfuhr durch Stützrollenkontakt und Strahlung als Randbedingung in der Sekundärkühlzone verwendet. Die Ermittlung der Korrelationsparameter wurde mit Hilfe von WID und HTC Messungen durchgeführt. Das Modell wurde mit gemessenen Brammenoberflächentemperaturen validiert.

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Acknowledgements

The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research program of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian program for competence centers. COMET is funded by the Federal Ministry for Transport, Innovation and Technology, the Federal Ministry for Science, Research and Economy, the provinces of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG).

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Authors and Affiliations

  1. K1-MET GmbH, Stahlstraße 14, 4020, Linz, Austria

    Lukas Preuler

  2. Aalto University, Otakaari 1, 02150, Espoo, Finland

    Seppo Louhenkilpi

  3. University of Oulu, Pentti Kaiteran katu 1, 90570, Oulu, Finland

    Seppo Louhenkilpi

  4. Montanuniversitaet Leoben, Franz-Josef-Straße 18, 8700, Leoben, Austria

    Christian Bernhard & Matthias Taferner

  5. voestalpine Stahl GmbH, voestalpine-Straße 3, 4020, Linz, Austria

    Sergiu Ilie

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  1. Lukas Preuler
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  2. Seppo Louhenkilpi
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Correspondence to Lukas Preuler.

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Preuler, L., Louhenkilpi, S., Bernhard, C. et al. Utilization of Experimental Data as Boundary Conditions for the Solidification Model Tempsimu-3D. Berg Huettenmaenn Monatsh 165, 237–242 (2020). https://doi.org/10.1007/s00501-020-00970-7

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  • DOI: https://doi.org/10.1007/s00501-020-00970-7

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