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Study of the scale behaviour in the finishing mill to improve the strip surface quality*

  • D. Espinosa (a1), G. Lannoo (a1), J. Malbrancke (a1), G. Moreas (a1) and M. Picard (a2)...

Abstract

The cracking behaviour of the oxide layer formed during hot rolling was studied together with different combinations of process parameters in order to find their single influence on the surface quality and formation of oxide defects. Several trials were performed on the CRM pilot line to study in detail the impact of strip reduction, strip temperature, entry scale thickness, roll degradation, lubrication, skin cooling, chemical composition and humidity on the scale behaviour. In general, the degree of deformation, entry scale thickness and rolling temperatures are the most important parameters and the importance decreases in that order.

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[1] F. Freidel, H. Bolt, X. Cornet, G. Bourdon, X. Vanden Eynde, E. Zeimetz, S. Ehlers, F. Steinert, Investigation of the formation, constitution and properties of scale formed during the finishing, rolling, cooling and coiling of thin hot strips, ECSC steel RTD project 7210. PR/153, Final report, December 2002
[2] D. Filatov, O. Pawelski, W. Rasp, Hot-Rolling experiments on deformation behaviour of oxide scale, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany, 2004
[3] H. Blaas, Methods of determination of strength of scale adhesion, Wire Wold International, vol 23, November/December 1981
[4] M.B. Picque, Experimental study and numerical simulation of iron oxide scale mechanical behaviour in hot rolling, l’École des Mines de Paris
[5] J. Malbrancke, H. Uijtdebroeks, G. Walmag, A new procedure to asses the hot rolling work roll materials, Revue de Métallurgie 10 (2007), p. 512
[6] Shirizly, A., Lenard, J.G., The effect of lubrication on mill loads during hot rolling of low carbon steel strips, J. Mat. Processing Techn. 97 (2000) 61-68

Keywords

Study of the scale behaviour in the finishing mill to improve the strip surface quality*

  • D. Espinosa (a1), G. Lannoo (a1), J. Malbrancke (a1), G. Moreas (a1) and M. Picard (a2)...

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