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<p>Polishing stainless steel is crucial for enhancing surface corrosion resistance and minimizing surface roughness. However, current polishing methods for stainless steel parts are inefficient and yield poor surface quality. Hence, to address this issue, this paper proposes a novel method of micro-arc plasma discharge polishing (MAPDP), which enables high-efficiency polishing of stainless steel parts without forming a surface oxidation layer. This study introduces the principle of the MAPDP technique and establishes an experimental platform. Experiments are conducted on SUS304 stainless steel polishing to verify the feasibility of the proposed method. The study investigates the effects of power supply voltage, electrolyte concentration, and polishing time on surface roughness and material removal rate (MRR). The optimal process parameters for polishing are determined as follows: a power supply voltage of 300&#xa0;V, a polishing electrolyte concentration of 4&#xa0;wt%, and a polishing time of 10&#xa0;min. The experimental results demonstrate that the proposed method effectively reduces the surface roughness from <i>Sa</i> 0.505&#xa0;μm to <i>Sa</i> 0.0616&#xa0;μm, achieving an MRR of 3.11&#xa0;μm/min. The material removal mechanism in MAPDP is explained in three aspects: the electrochemical reaction generates an oxide film on the part surface, which is removed by continuous plasma discharging during the pulse-on phase and by Bubble cavitation flattening during the pulse-off phase. This study presents a novel approach for achieving a smooth finish on stainless steel parts with micro-roughness and intricate shapes. The proposed MAPDP method offers promising potential for improving the efficiency and quality of stainless steel polishing processes.</p>

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Study on material removal mechanism in micro-arc plasma discharge polishing for SUS304 stainless steel

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Xincheng Yin,
  • Youliang Wang,
  • Jianhui Liu,
  • Linfeng Deng,
  • Shujuan Li

摘要

Polishing stainless steel is crucial for enhancing surface corrosion resistance and minimizing surface roughness. However, current polishing methods for stainless steel parts are inefficient and yield poor surface quality. Hence, to address this issue, this paper proposes a novel method of micro-arc plasma discharge polishing (MAPDP), which enables high-efficiency polishing of stainless steel parts without forming a surface oxidation layer. This study introduces the principle of the MAPDP technique and establishes an experimental platform. Experiments are conducted on SUS304 stainless steel polishing to verify the feasibility of the proposed method. The study investigates the effects of power supply voltage, electrolyte concentration, and polishing time on surface roughness and material removal rate (MRR). The optimal process parameters for polishing are determined as follows: a power supply voltage of 300 V, a polishing electrolyte concentration of 4 wt%, and a polishing time of 10 min. The experimental results demonstrate that the proposed method effectively reduces the surface roughness from Sa 0.505 μm to Sa 0.0616 μm, achieving an MRR of 3.11 μm/min. The material removal mechanism in MAPDP is explained in three aspects: the electrochemical reaction generates an oxide film on the part surface, which is removed by continuous plasma discharging during the pulse-on phase and by Bubble cavitation flattening during the pulse-off phase. This study presents a novel approach for achieving a smooth finish on stainless steel parts with micro-roughness and intricate shapes. The proposed MAPDP method offers promising potential for improving the efficiency and quality of stainless steel polishing processes.