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The impact of hot asymmetric rolling was thoroughly investigated during this three-year project, by efficiently combining experimental and simulation work. Experimentally four different configurations of asymmetric hot rolling have been explored in the project, differing by the roll diameters or the fact that one or both rolls are driven. It turned out that asymmetric hot rolling reduces rolling force, torque and current. The effect of hot asymmetric rolling with respect to grain refinement appears lower than what was expected at the start of the project. Concerning austenitic rolling, asymmetric rolling can be used to gain through thickness homogeneity and in refinement by applying higher reductions thanks to the gain in rolling load. Results also suggest that asymmetric ferritic rolling could help achieving lower thickness reductions in the hot band (and so in the cold strip) by combining reduction of rolling forces, easier recrystallisation during coiling and no remaining shear texture component in the final cold rolled and annealed microstructure. Finally this project provides a good overview of the potentiality of hot asymmetric rolling with respect to metallurgical interest. It has defined for which applications asymmetric rolling could show interesting prospects. Further investigations are now required to confirm the interest of hot asymmetric rolling combining metallurgical and economical aspects, especially regarding hot ferritic rolling for soft drawable grades with the aim of reducing final thickness and grain refinement through achievement of higher thickness reductions due to gain rolling forces.

Additional information

Authors: HERMAN G, ArcelorMittal Research, Maizières-lès-Metz (FR);BARCELO D, ArcelorMittal Research, Maizières-lès-Metz (FR);MUSIK C, ArcelorMittal Research, Maizières-lès-Metz (FR);RÉGLÉ H, ArcelorMittal Research, Maizières-lès-Metz (FR);VANEL L, ArcelorMittal Research, Maizières-lès-Metz (FR);LANNOO G, Centre de Recherche Métallurgiques (CRM), Liège (BE);SALVATORI I, Centro Sviluppo Materiali (CSM), Rome (IT)
Bibliographic Reference: EUR 23335 EN (2008), 142 pp. Euro: 20
Availability: Katalogue Number: KI-NA-23335-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 978-92-79-08362-4
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