Surface Modification Of Mild Steel Using Powder Metallurgy (PM) CU Electrode

Zainal Abidin, Siti Nuradibah (2019) Surface Modification Of Mild Steel Using Powder Metallurgy (PM) CU Electrode. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Electrical discharge coating (EDC) technology has been widely used in improving the surface of a material where different elements with better properties will be coated onto the surface of the workpiece to increase microhardness, enhance the surface roughness, as well as elevating its corrosion resistance. EDM die sinker machine, Sodick AQ35L is used to run the experiment. The main objective of this study is to investigate the effect of the EDC parameters on the deposition layer, micro-hardness, and weight percentage of copper on the coated surface using powder metallurgy (PM) copper electrode. In this study, two parameters, which are peak current (Ip) and pulse on-time (Ton) were selected. Various characterisation techniques such as SEM, and EDX were used to discover the topography, and existence of deposited materials on the workpiece surface. Meanwhile the micro-hardness of the coated surface is observed by using a Micro Hardness Testing Machine. The results show that copper element from PM copper electrode and carbon from dielectric fluid have successfully deposited onto the surface of mild steel which improved the micro-hardness value by 64.63% when IP = 10 A and Ton = 15 μs was used.

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