Title: Surface roughness micro-deformation and transfer of bulk steel in hot rolling

Authors: Z.Y. Jiang, J. Tang, A.K. Tieu, W. Sun, D. Wei

Addresses: School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia. ' School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia. ' School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia. ' Technical Center, Jinan Iron and Steel Co, PR China. ' School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia

Abstract: Surface roughness micro-deformation and transfer of bulk steel with oxide scale during hot rolling have a significant effect on the surface roughness and quality of final product. Using MSC-MARC finite element package, effects of the reduction, initial surface roughness of oxide scale, steel and work roll on surface roughness micro-deformation and transfer of the bulk steel have been analysed, and the results show that the surface roughness reduces significantly with an increase in reduction. Large initial surface roughness of oxide scale, steel and work roll can make final surface roughness to increase, and the effect of the average asperity wavelength is insignificant. The calculated surface roughness was verified with the measured value.

Keywords: surface roughness; bulk steel transfer; oxide scale; microdeformation; hot rolling; deformation; product quality; finite element method; FEM; asperity wavelength.

DOI: 10.1504/IJSURFSE.2008.018973

International Journal of Surface Science and Engineering, 2008 Vol.2 No.1/2, pp.139 - 151

Published online: 26 Jun 2008 *

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