Abstract
In cold rolling some surface defects, known as pits, are due to lubricant that, entrapped in the deep valleys of the surface roughness, is nearly incompressible and acts like an inclusion avoiding microcavity elimination. During the rolling process, when specific favorable conditions can be set up, the lubricant may be expelled by the microplasto-hydrodynamic lubrication (MPHL) mechanism and pits may be recovered. In this paper the Λm parameter, index of the MPHL, is investigated together with the neutral point position to better understand the practical process recommendations for surface defect recovery. By means of finite element analysis of a Sendzimir’cold rolling process, the sensitivity of these objective functions are studied by means of a design of experiment analysis changing the major process variables like back tension, friction coefficient, reduction parameter, initial thickness, and roll diameter.
Article PDF
Similar content being viewed by others
References
Ahmed R, Sutcliffe MPF (2001) An experimental investigation of the surface pit evolution during cold rolling or drawing of stainless steel strip. J Tribol 123:1–7
Le HR, Sutcliffe MPF (2003) Evolution of surface pits on stainless steel strip in cold rolling and strip drawing. J Tribol 125:384–390
Sutcliffe MPF, Geordiades F (2002) Characterisation of pit geometry in cold-rolled stainless steel strip. Wear 253:963–974
Sutcliffe MPF, Le HR, Ahmed R (2001) Modelling of micro-pit evolution in rolling or strip-drawing. J Tribol 123:791–798
Kenmochi K et al (1997) Effect of micro-defects on the surface brightness of cold-rolled stainless-steel strip. J Mater Process Tech 69(1–3):106–111
Wang Z, Dohda K, Haruyama Y (2005) Effects of entraining velocity of lubricant and sliding velocity on friction behaviour in stainless steel sheet rolling. Wear 260(3):249–257
Wilson WRD, Lo SW (1999) A theoretical model of micro-pool lubrication in metal forming. J Tribol 121:731–738
Mancini E, Sasso M, Amodio D, Ferretti R, Sanfilippo F (2011) Surface defect generation and recovery in cold rolling of stainless steel strips. J Tribol 133. doi:10.1115/1.4002218
Montgomery D (1991) Design of experiment. Wiley, New York
Cowper GR, Symonds PS (1958) Strain hardening and strain rate effect in the impact lading of cantilever beam. Applied Mathematics Report, Brown University
Peroni L, Peroni M (2006) Sviluppo di sistemi di prova per la caratterizzazione a trazione di lamiere ad elevata velocità di deformazione. Proceeding of XXXV AIAS Congress, Ancona, Italy
Sasso M, Newaz G, Amodio D (2008) Material characterization at high strain rate by Hopkinson bar tests and finite element optimization. Mat Sci Eng A 487:289–300
Dietenberger M, Buyuk M, Kan C-D (2005) Development of high strain-rate dependent vehicle model. LS-DYNA Anwenderforum, Bamberg
Cunat PJ (2000) Stainless steel proprieties for structural automotive applications. Proc Met Bull Internation Automot Mater Conference, Cologne
Mancini E, Newaz G, Sasso M, Ferretti R, Dhorajiya AP (2008) Effetto della velocità di deformazione sulla formazione dei difetti superficiali nella laminazione a freddo. Proceeding of XXXVII AIAS Congress, Rome, Italy
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mancini, E., Campana, F., Sasso, M. et al. Effects of cold rolling process variables on final surface quality of stainless steel thin strip. Int J Adv Manuf Technol 61, 63–72 (2012). https://doi.org/10.1007/s00170-011-3698-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-011-3698-3