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Minimum quantity lubrication using nano cutting fluids (NFMQL) supports hard turning processes by improving cutting conditions, enhancing the economic and technical efficiency of hard turning, and aligning with the trend toward sustainable and environmentally friendly manufacturing. This research presented the results of a study on the influence of NFMQL using MoS2 nano-cutting oil on the surface roughness Ra during the hard turning of 90CrSi steel (60 - 62 HRC). Analysis of variance (ANOVA) was used to evaluate the influence of nano particle concentration (NC), gas flow pressure (p), and gas flow rate (Q) on surface roughness (Ra). The research showed that NC had the greatest influence (57,42%), followed by Q (27,10%), and p (15,48%)
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Ngoc et al. (2026) studied this question.
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