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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