Open Access

Table 3

Cutting conditions.

Machining tool HMT Lathe
Machining operation Hard turning
Workpiece material AISI 4340 steel (Ø 45 mm, 600 mm, 47 ± 1 HRC, heat treated)
Tool holder PSBNR 2020 K12
Tool material Uncoated cermet (SNMG 120408)
Cutting speed (m/min) 80,100, 120, 140
Feed (mm/rev) 0.05, 0.1, 0.15, 0.2
Depth of cut (mm) 0.1, 0.2, 0.3, 0.4
Lubricating environment MQL with CuO + RB oil, Al2O3 + RB oil and Fe2O3 + RB oil
Supply mode MQL
Flow rate 150 ml/h
Machining length 120 mm
% of nanoparticle 0.1%

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