Title: Tribological features of roll surface in cold metal rolling

Authors: Hongchun Li, Zhengyi Jiang, A. Kiet Tieu, Weihua Sun, Dongbin Wei, Hongtao Zhu

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. ' Technology Centre, Jigang Group Co., Ltd., Jinan 250101, PR China. ' 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

Abstract: Cold strip rolling under dry and lubricated conditions was conducted on a new developed mini-mill, which was installed in the Gleeble 3500 Thermo-mechanical Simulator. The surface roughness and Power Spectrum Density (PSD) features of the rolls were analysed. Results show that the lubrication significantly reduces surface roughness of the 4%Cr roll, but has less effect on surface roughness of the 4%Cr with Ti-added roll. The surface deterioration of 4%Cr with Ti-added roll varies significantly with an increase of rolling passes. Asperities on roll surface experience inhomogeneous variation, which indicates the deterioration of surface roughness is different for both roll materials.

Keywords: surface roughness; lubrication; roll materials; cold rolling; tribology; power spectrum density.

DOI: 10.1504/IJSURFSE.2009.029137

International Journal of Surface Science and Engineering, 2009 Vol.3 No.5/6, pp.407 - 422

Available online: 06 Nov 2009 *

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