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Discharge characteristics of W-Cu electrode in short electrical arc discharge machining of Inconel 718

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Abstract

The current application of short electrical arc discharge machining (SEAM) for cemented carbide removal is limited by its surface quality. In this study, tungsten-copper (W-Cu) alloy materials with different proportions as electrodes were studied by experimental methods. The mechanism of electrical parameters and composition content affecting the processing performance of SEAM was investigated, including surface roughness (Ra), material removal rate (MRR), micro-morphology, and the recast layer thickness (RLT). The results showed that the maximum MRR with W50-Cu electrode was 41 g/min, and the processing performance was the best with W90-Cu electrode in the U of 25 V, F of 2.3 KHz, and D of 55%. The W90-Cu electrode could provide good processing, and a thinner and more uniform recast layer was found on the workpiece surface. Therefore, W-Cu alloy tools are recommended when the hard surface materials machined by SEAM requires higher accuracy and surface finish.

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Funding

This research was supported by the Natural Science Foundation of China (51765063) and Autonomous University Scientific Research Program Natural Science Project (XJEDU2020Y011).

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Authors and Affiliations

  1. School of Mechanical Engineering, Xinjiang University, Ürümqi, 830000, China

    XueZhi Li, JianPing Zhou & Yan Zhang

  2. Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun, 130022, China

    DaQian Sun & HongMei Li

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  1. XueZhi Li
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  2. JianPing Zhou
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  3. Yan Zhang
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  4. DaQian Sun
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  5. HongMei Li
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Correspondence to Yan Zhang.

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Li, X., Zhou, J., Zhang, Y. et al. Discharge characteristics of W-Cu electrode in short electrical arc discharge machining of Inconel 718. Int J Adv Manuf Technol 110, 2427–2437 (2020). https://doi.org/10.1007/s00170-020-06041-y

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  • DOI: https://doi.org/10.1007/s00170-020-06041-y

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