Purpose – The main purpose of this paper is to explore the use of solid lubricant during orthogonal machining of carbon steels. This is a pioneer work in Nigeria. Most works have been on oblique cutting using conventional oil as lubricants. Design/methodology/approach – Different steels (low, medium and high carbon) were machined at different cutting conditions and tool geometries to determine the effects on surface characteristics while applying solid lubricant. Findings – The results showed considerable improvement in the surface finish with the use of solid lubricant. There was also a decrease in surface roughness values as compared to wet machining. Research limitations/implications – Further works on solid lubricant's effects on cutting force and residual stress could be done. Practical implications – From the findings of this work, solid lubricant use can be advocated as a better alternative to conventional cutting fluid. It is easily recoverable from the chips after machining. Originality/value – So far, in Nigeria, solid lubricant has not been exploited as coolant during machining. This paper will be a platform for other researches on solid lubricants as coolant during cutting/machining in Nigeria.
Journal of Engineering, Design and Technology – Emerald Publishing
Published: Jul 12, 2011
Keywords: Graphite; Machining; Surface roughness; Surface properties of materials; Nigeria
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