Abstract The present work aims to examine the drilling performance of AISI 321 stainless steel using vegetable-oil-based cutting fluid under different minimum quantity lubrication (MQL) strategies (with and without graphene nanoparticles). Experimental results indicated that MQL drilling with 1.5 wt% of graphene nanoparticles considerably reduced the thrust force (27.4%), torque (64.9%), surface roughness (33.8%) and coefficient of friction (51.7%) at the 30th hole as compared to pure MQL condition and also improved the tool life. In brief, the sufficient quantity of graphene nanoparticles in nanofluid MQL drilling can boost the lubrication performance and increase the stability of lubrication film, which improves the drilling characteristics.

中文翻译：

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纳米石墨烯增强植物油基切削液对AISI 321不锈钢MQL钻孔性能的试验研究

摘要 目前的工作旨在检查使用植物油基切削液在不同最小量润滑 (MQL) 策略（有和没有石墨烯纳米粒子）下的 AISI 321 不锈钢钻孔性能。实验结果表明，与第 30 个孔相比，使用 1.5 wt% 石墨烯纳米颗粒的 MQL 钻孔显着降低了第 30 个孔的推力（27.4%）、扭矩（64.9%）、表面粗糙度（33.8%）和摩擦系数（51.7%）。纯 MQL 条件，也提高了刀具寿命。简而言之，纳米流体MQL钻孔中足量的石墨烯纳米颗粒可以提高润滑性能并增加润滑膜的稳定性，从而改善钻孔特性。