Investigation of the sustainable machinability of high alloy stainless steel

Stainless steels are very difficult to shape with chips due to their low thermal conductivity, high hardening and strength. Although machining is difficult, machining is applied in different fields such as chemistry, food and automotive. With the application of some cutting fluids, their maching can be realized. But nature is at a disadvantage in terms of human health and the high cost of processing. In the literature, the studies carried out by applying the MMY method in sustainable environments of stainless steels are very few. In this study, it was aimed to determine the effects on machining parameters by milling the high alloy X33CrS16 stainless steel selected as a workpiece in five different sustainable environments using different machining parameters. In this context, two different cutting speeds (120 and 150 m/min), two different feed speeds (0.08 and 0.15 mm/rev) and fixed cutting depth (0.6 mm) were selected as operating parameters for machinability experiments. In addition, five different [dry, MMY-Mineral Oil, N1-MMY Emulsion, N2-MMY Emulsion and MMY- Emulsion (mineral oil + water)] media were used as cooling and lubrication media in the experiments. A total of 20 experiments consisting of five different environments and four different processing parameters were carried out. For each experiment, the cutting temperature, surface roughness, tool wear and power consumption values were measured and recorded, and the effects of machinability parameters on output parameters were examined. In addition, pH, viscosity, SEM, EDX analyzes and contact angle measurement analyzes were performed. The best processing performance recorded in all test results was achieved under nanofluidic (N1-MMM Emulsion) conditions with nanotose addition containing 0.5% Al2O3 by weight.