Abstract
In the Electrical Discharge Machining (EDM), the impedance of dielectric fluids is an obstacle in the machining of complicated materials. Therefore, the previous researches focused on enhancing these fluids in EDM by adding powder particles, surfactant, or powder and surfactant together. However, these studies have not performed a comparison between the Powder-Mixed Dielectric Fluid (PMDF) and Surfactant-Mixed Dielectric Fluid (SMDF) in EDM environment. Therefore, the present study aims to achieve this comparison on the machining of D2 steel by employing copper electrode, Nano Chromium Particles (NCP), and Span-20. In addition, we investigate the effect of these mixed fluids on the Material Removal Rate (MRR) and Tool Wear Rate (TWR). The increase of pulse-on-time to 30 µs at 6 g/L of the maximum level of concentration of NCP did not lead to a simultaneous increase for each of the MRR and TWR in PMDF. However, this experimental environment enhanced these outcomes based on the absorbing and conductivity properties of the NCP. Consequently, this study has attained the best MRR and TWR with PMDF as compared to SMDF.
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