Title: Surface characterisation of electrical discharge pulse-mode textured cold work rolls

Authors: Marton Huszar; David T. Gethin

Addresses: College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, Wales, UK ' College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, Wales, UK

Abstract: The thickness of steel sheets is usually reduced by passing the cold coil through rolls in a cold mill. These work rolls have a distinct surface texture, often generated by electrical discharge texturing (EDT). When the sheets pass through these work rolls, the texture of the work rolls will be imparted on the surface of the sheets. This surface characteristic may influence the sheet's paint appearance and the retention of lubricant. The paper aims to determine the main effects and interactions of EDT processing parameters and to characterise the textured roll surfaces using stylus and white light interferometry (WLI) techniques with respect to surface properties. It has been discovered that work roll polarity, texturing power and on-time had an impact on roughness average and peak count. It was revealed that skewness and kurtosis values were not affected by changes in the texturing process settings.

Keywords: electrical discharge texturing; EDT; pulse mode; surface roughness; surface characterisation; surface quality; electro-discharge texturing; cold rolling; sheet thickness; steel sheets; cold work rolls; roll surfaces.

DOI: 10.1504/IJSURFSE.2015.070811

International Journal of Surface Science and Engineering, 2015 Vol.9 No.4, pp.328 - 342

Received: 14 Feb 2014
Accepted: 24 Apr 2014
Published online: 28 Jul 2015 *

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