An Investigation on Effects of Cutting Parameters on Surface Roughness in Hard Milling of AISI D2 Tool Steel Under Nano fluid MQL Environment

Hard milling nanofluid SiC nanoparticle MQL cutting speed feed rate surface roughness

Authors

  • Nguyen Tan Hoa Technical and Technology Department, 27 One Member Limited Liability Company, Thai Nguyen, Vietnam
  • Long Tran The Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Thai Nguyen University of Technology, Thai Nguyen, Vietnam
March 17, 2026
March 19, 2026

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The main objective of this paper is to study the effects of SiC nanoparticle concentration, cutting speed, and feed rate on the surface roughness Ra in the hard milling process of SKD 11 tool steel (58 ÷ 60 HRC) under nanofluid MQL condition. The influences of input parameters were studied by usingthe Box-Behnken experimental design. The obtained experimental results indicated that the feed rate is the most influential effect on surface roughness, followed by the cutting speed and then nanoparticle concentration. In addition to that, the interaction effects between nanoparticle concentration and cutting speed and the square effects of cutting speed and feed rate cause the significant impacts on the surface roughness Ra. Moreover, the SiC nanoparticle concentration NC=0.3%, cutting speed v= 150 m/min, and feed rate f=0.01mm/tooth are the appropriate set and should be recommended for reaching the smaller surface roughness Ra values.