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State of the Art in Rolling Process Modelling

Die modernsten Methoden der Walzprozessmodellierung

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Abstract

Pushed forward by mill complexification and harder product quality requirements, the mathematical treatment has evolved into very complex, multi-coupled models: roll deformation, thermal transfer, lubrication, and oxide scales are a few examples. The diversity of rolled products and rolling mills makes rolling process modelling a vast field indeed. Beyond general, necessarily very costly models, partial descriptions are developed for more targeted goals. Three methods share the market: the Slab Method (SM), the Upper Bound Method (UBM), and the Finite Element Method (FEM). A few modelling strategies based on the above three are described, providing accurate solutions in an industry-compatible computation time: steady-state FEM modelling; faster 2D SM with large roll flattening to build thin sheet or temper rolling force models; low-cost 3D roll stack deformation package for profile/flatness of sheets; FEM results-based UBM models of width variations in the Tandem Cold Mill; post-bite profile and flatness evolution (interstand behavior); FEM description of oxide scale behavior in descaling; SM with modern lubrication modelling. Evolutions of rolling processes are questioned to point to new demands on modelling and how to answer them.

Zusammenfassung

Getrieben durch die steigende Komplexität der Walzwerke und härteren Produktanforderungen haben sich für die mathematische Beschreibung sehr komplexe, multipel-gekoppelte Modelle entwickelt: Walzenverformung, Wärmeübergang, Schmierung und Zunderschichten sind einige Beispiele. Die Vielfalt von Walzprodukten und Walzwerken macht Walzprozessmodellierung in der Tat zu einem breiten Feld. Zusätzlich zu den im Allgemeinen sehr kostspieligen Modellen wurden Teildarstellungen für spezifische Zwecke entwickelt. Drei Methoden teilen sich den Markt: die Slab-Methode (SM), die Upper-Bound-Methode (UBM) und die Finite-Elemente-Methode (FEM). Basierend auf den drei oben beschriebenen Methoden bieten einige Modellierungsstrategien, präzise Lösungen in einer industrietauglichen Rechenzeit: Steady-State-FEM-Modellierung; 2D-SM mit großen Rollenabflachungen, um schneller Modelle für dünnes Blech oder Dressierwalzen zu bauen; Low-Cost-3D-Pakete für Walzgerüste für Profil/Planheit von Bändern; FEM ergebnisorientierte UBM Modelle für Breitenschwankungen in der Tandemstraße; Entwicklung nach dem Walzstich für Profil und Planheit (Verhalten des Zwischengerüstzugs); FEM zur Beschreibung des Verhaltens der Oxidzunderschicht beim Entzundern; SM mit modernen Schmiermodellierungen. Die Entwicklungen von Walzprozessen werden untersucht, um neue Anforderungen an die Modellierung zu zeigen und wie diese zu bewältigen sind.

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Authors and Affiliations

  1. MINES ParisTech – CEMEF, 1 rue Claude Daunesse, CS 10207, 06904, Sophia-Antipolis, France

    Pierre Montmitonnet & Lionel Fourment

  2. TRANSVALOR S.A., Sophia-Antipolis, France

    Ugo Ripert

  3. ArcelorMittal Global R&D Process, Maizières-les-Metz, France

    Quang Tien Ngo

  4. Navier Laboratory, ECOLE DES PONTS ParisTech, Marne-la-Vallée, France

    Alain Ehrlacher

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  1. Pierre Montmitonnet
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  2. Lionel Fourment
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  4. Quang Tien Ngo
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  5. Alain Ehrlacher
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Correspondence to Pierre Montmitonnet.

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Montmitonnet, P., Fourment, L., Ripert, U. et al. State of the Art in Rolling Process Modelling. Berg Huettenmaenn Monatsh 161, 396–404 (2016). https://doi.org/10.1007/s00501-016-0520-4

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