Effects of the cutting mode on surface roughness in hard turning of 90CrSi tool steel under MQL and nanofluid MQL conditions

Tran Minh Duc; Tran The Long

doi:10.30574/gjeta.2026.26.3.0070

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Effects of the cutting mode on surface roughness in hard turning of 90CrSi tool steel under MQL and nanofluid MQL conditions

Tran Minh Duc and Tran The Long ^*

Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Thai Nguyen University of Technology, Thai Nguyen, Vietnam.

Research Article

Global Journal of Engineering and Technology Advances, 2026, 26(03), 227-231

Article DOI: 10.30574/gjeta.2026.26.3.0070

DOI url: https://doi.org/10.30574/gjeta.2026.26.3.0070

Publication history

Received on 12 February 2026; revised on 22 March 2026; accepted on 24 March 2026

Abstract

The paper aims to study the effects of cooling/lubricating mode, cutting speed, and feed rate on the surface roughness Ra in the hard turning process of 90CrSi tool steel (60 ÷ 62 HRC) under pure MQL and nanofluid MQL conditions. The influences of input parameters were studied by using the factorial experimental design. The results showed that the feed rate is the most influential effect on surface roughness, followed by cooling/lubricating mode and then the cutting speed. Meanwhile, the interaction effects cause the insignificant impacts on the surface roughness Ra. Moreover, MQL technique using Al2O3 nano cutting oil, cutting speed of 160 m/min, and feed rate of 0.05mm/rev are the proper selection and should be used to achieve the smaller surface roughness R_a values.

Keywords

Hard Turning; Nanofluid; Al₂O₃ Nanoparticle; MQL; Cutting Speed; Feed Rate; Surface Roughness

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How to cite this article

Tran Minh Duc and Tran The Long. Effects of the cutting mode on surface roughness in hard turning of 90CrSi tool steel under MQL and nanofluid MQL conditions. Global Journal of Engineering and Technology Advances, 2026, 26(03), 227-231. Article DOI: https://doi.org/10.30574/gjeta.2026.26.3.0070.

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