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Damage resistance and roughness retention of work rolls in cold rolling mills*

Published online by Cambridge University Press:  15 October 2010

P.H. Bolt
Affiliation:
Corus Research, Development and Technology, PO Box 10000, 1970 CA IJmuiden, The Netherlands
D. Batazzi
Affiliation:
Åkers Belgium S.A., Belgium
N.P. Belfiore
Affiliation:
University of Rome La Sapienza, Italy
C. Gaspard
Affiliation:
Åkers Belgium S.A., Belgium
L. Goiset
Affiliation:
Åkers Belgium S.A., Belgium
M. Laugier
Affiliation:
ArcelorMittal Research S.A., France
O. Lemaire
Affiliation:
Centre de Recherches Métallurgiques ASBL, Belgium
D. Matthews
Affiliation:
Corus Research, Development and Technology, PO Box 10000, 1970 CA IJmuiden, The Netherlands
S. Mul
Affiliation:
Corus Strip Products IJmuiden, The Netherlands
T. Nylén
Affiliation:
Åkers AB, Sweden
K.M. Reuver
Affiliation:
Corus Research, Development and Technology, PO Box 10000, 1970 CA IJmuiden, The Netherlands
D. Stocchi
Affiliation:
Centro Sviluppo Materiali S.p.A, Italy
F. Stork
Affiliation:
Lismar Engineering B.V., The Netherlands
J. Tensen
Affiliation:
Lismar Engineering B.V., The Netherlands
M. Tornicelli
Affiliation:
ArcelorMittal Research S.A., France
R. Valle
Affiliation:
Centro Sviluppo Materiali S.p.A, Italy
E. van den Elzen
Affiliation:
Lismar Engineering B.V., The Netherlands
C. Vergne
Affiliation:
Åkers Belgium S.A., Belgium
I.M. Williams
Affiliation:
Corus Research, Development and Technology, UK
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Abstract

For every mill the ideal roll can be considered as one that can be used in a mill stand indefinitely. Unfortunately for the roll user, such ideal rolls do not exist. One major reason for work roll changes (planned or unplanned) is “wear”. In the context of cold rolling and temper rolling, “wear” primarily refers to loss of roughness and/or surface texture. Another limitation to roll performance is the fact that mill incidents – minor as well as major incidents – inflict damage on the work rolls, requiring redressing in the roll shop. If a major defect is present in a forged roll, e.g. due to a mill incident, catastrophic roll failure may occur in a violent, explosive manner. Improvement of the value-in-use of a work roll implies a superior wear resistance, a superior damage resistance, and elimination of the safety risks associated with explosive roll failures. In order to deal with this in a concerted R&D approach, a consortium of two roll users in the steel industry, a leading roll manufacturer, a high-tech supplier of roll damage detection equipment, and specialised research institutes have joined forces. Cold rolling trials have been performed, using pilot mills as well as industrial mills, with both novel forged HSS work rolls and conventional forged 3–5%Cr steel work rolls. Separate trials have been designed to focus on either the aspect of roughness evolution or damage resistance. Complementary data from various laboratory tests and industrial mill and roll shop data have been collected. Models have been developed for damage evolution in a roll, and for roughness evolution of the roll surface. In addition, novel non-destructive detection systems and sensors have been designed and tested. This paper provides a concise overview of the results achieved.

Type
Research Article
Copyright
© EDP Sciences

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References

* Presented at the 5th European Rolling Conference, June 2009. Organised by IOM Communications Ltd on behalf of the Rolling Committee of the Institute of Materials, Minerals and Mining (http://www.iom3.org)