Effects of Steel Surface Texture on Appearance After Painting

Bastawros, A.F.; Speer, John G.; Zerafa, Gorica; Krupitzer, Ronald P.

doi:10.4271/930032

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…The reader should also be made aware that the paint film also contributes to the appearance of a composite surface and can also have an effect on the degree of orange peel depending on how the film was applied and the chemistry of the film, although further discussions regarding this topic are out of the scope of this article. It has previously been shown that the use of thick paint films mask the effects of substrate roughness on the final painted appearance 21 and, conversely, thinner paint layers further emphasis the substrate defects. The paint thicknesses used in this study (Table 1) represent those commonly used by the automotive industry.…”

Section: Resultsmentioning

confidence: 99%

Hygrothermal effects on painted carbon fibre composite surfaces

Souza

Mardel

Fox

2012

Journal of Composite Materials

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In this article, the effect of hygrothermal aging on the painted surface finish of unidirectional and fabric carbon fibre composite laminates, with and without surfacing film was investigated. The results highlighted the importance of ensuring that the composite surface directly beneath the paint layer is made from a uniform material with a consistent thickness in order to minimise surface defects from occurring during aging. The surfacing film was found to minimise the print through development on the painted unidirectional and twill composite surfaces. However, the surfacing film layer was found to intermingle with the carbon fibre plies during cure, which resulted in an uneven film thickness that caused increased levels of orange peel. The twill laminate painted surface produced high levels of print through and surface waviness that was caused by the large resin rich regions located within the tow intersections at the surface which enlarged due to thermal expansion and swelling of the matrix with hygrothermal aging. It was also noted that the small resin rich regions between the individual carbon fibres on the unidirectional composite surface were sufficiently large to print through the painted surface.

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Section: Resultsmentioning

confidence: 99%

Hygrothermal effects on painted carbon fibre composite surfaces

Souza

Mardel

Fox

2012

Journal of Composite Materials

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“…Temper rolling is a critical process in strip steel production, which involves cold-rolling the steel to improve its mechanical and surface properties. For high-value products like automotive paneling, meeting customer demands extends beyond achieving favorable mechanical properties and necessitates specific surface properties to facilitate better press performance [1] and ensure paint quality [2].…”

Section: Introductionmentioning

confidence: 99%

Steel Surface Roughness Parameter Calculations Using Lasers and Machine Learning Models

Milne,

Xie

2023

Preprint

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Control of surface texture in strip steel is essential to meet customer requirements during galvanizing and temper rolling processes. Traditional methods rely on post-production stylus measurements, while on-line techniques offer non-contact and real-time measurements of the entire strip. However, ensuring accurate measurement is imperative for their effective utilization in the manufacturing pipeline. Moreover, accurate on-line measurements enable real-time adjustments of manufacturing processing parameters during production, ensuring consistent quality and the possibility of closed-loop control of the temper mill.In this study, we leverage state-of-the-art machine learning models to enhance the transformation of on-line measurements into a significantly more accurate Ra surface roughness metric. By comparing a selection of data-driven approaches, including both deep learning and non-deep learning methods, to the close-form transformation, we evaluate their potential for improving surface texture control in temper strip steel manufacturing.

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“…The target functionality of this study will be focused on the visual appearance of the painted steel sheet surfaces, which is quantified through the balance among roughness (Ra), peak count (RPc) and waviness (Wa) values as has been previously reported in several studies relating the influence of the steel sheet surface to their appearance after painting. Bastawros et al, 1993 described a comprehensive analysis of the influence of substrates and surface topography on the final paint appearance, finding waviness and peak count as key parameters that can be transmitted through the paint layers. The correlation between roughness parameters and paint appearance was also studied by Scheers et al 1996 et al Traditionally, surface texturing of mill rolls has been carried out by Shot Blasting Texturing (SB) (De Mello et al, 2013), where stochastic surface roughness is generated by the impact of small steel balls on the roll.…”

Section: Introductionmentioning

confidence: 99%