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Development and Characterization of Foundry Refractory Coating And Validation Through Factorial Design of Experiment

Author(s)
M. Wasim QA-Lab, Millat Tractors Ltd, Lahore, Pakistan
A. Salam Department of Metallurgy & Materials Engineering, CEET, University of the Punjab, Lahore, Pakistan
K.M. Deen Department of Metallurgy & Materials Engineering, CEET, University of the Punjab, Lahore, Pakistan
H. Rehman IQTM, University of the Punjab, Lahore, Pakistan
Abstract
Foundry Refractory Coatings are used to improve the surface finish of grey iron castings and reduces the post cleaning and re-work cost to eliminate surface defects. Present research was concentrated on the qualitative and quantitative analyses of commercial coatings through X-ray Diffraction and Energy Dispersive Spectroscopy, respectively. A number of coating compositions were developed by the addition of refractory fillers, binders. The effect of particle size, which is the most important parameter was validated via Design of Experiment protocol. Ultimately, three types of coating formulation were prepared and characterized using X-ray Diffraction. Fe2O3 and SiO2 were determined to the major phases in all coating samples. Particle size of 75 microns was selected as optimum to produce smooth surface finish. With these refractory coatings, the Gray iron castings were produced without inducing any significant effect on the mechanical properties and microstructural features. Finally, based on the experimental results, the formulation of a refractory coating is introduced that satisfied the required performance criteria.
Publication Details
Page(s) 15-25
DOI DOI not available
Published Journal: Journal of Pakistan Institute of Chemical Engineers, Volume: 48, Issue: 1, Year: 2020

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Keywords
Casting, Grey Iron, Design of Experiment, Foundry Refractory Coatings
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