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TECHNICAL PAPERS

Evolution of Surface Pits on Stainless Steel Strip in Cold Rolling and Strip Drawing

[+] Author and Article Information
H. R. Le, M. P. F. Sutcliffe

Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK

J. Tribol 125(2), 384-390 (Mar 19, 2003) (7 pages) doi:10.1115/1.1504088 History: Received February 12, 2002; Revised July 02, 2002; Online March 19, 2003
Copyright © 2003 by ASME
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References

Figures

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Schematic of inlet and MPHL lubrication mechanisms
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Evolution of the hydrodynamic pressure and contact ratio in the inlet zone for the first pass on shot-blast hot band, t1=4.0 mm,Ur=1−100 m/s,Rq=7.5 μm, and L0=0.3 mm
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Schematic of flattening of an asperity (a) with partial oil penetration and (b) with full oil penetration
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Comparison between the current model and the model by Sutcliffe et al. 10 in cold rolling, t1=4.0 mm,Ur=3 m/s,r=15 percent,L0=0.3 mm,A0=0.6, and θ=15 deg
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Comparison between the current model and the model by Sutcliffe et al. 10 in strip drawing, t1=4.1 mm,U2=0.017 m/s,r=15 percent,L0=0.3 mm,A0=0.6, and θ=15 deg
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Comparison between measurements and theory of the change in pit volume in drawing of bright-annealed strip with Vickers indentation
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Comparison between measurements and theory of the change in pit area of shot-blast hot band during strip drawing
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Comparison between measurements and theory of the change in pit area of shot-blast hot band during rolling
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Effect of rolling speed on the lubrication regime map. The curves track the evolution of lubrication regime through a pass schedule: t1=4.0 mm,Ur=3 m/s−10 m/s,r=15 percent, and θ=15 deg.
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Effect of pit slope on the lubrication regime map. The curves track the evolution of lubrication regime through a pass schedule: t1=4.0 mm,Ur=3 m/s,r=15 percent, and θ=15 deg−30 deg.

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