Investigation of machinability properties of soluble SiO2 doped nanofluids in milling cold work tool steels

In this study, the effects of innovative and sustainable cooling-lubrication methods on machining parameters during the milling of CPOH cold work tool steel were investigated. Experiments were conducted on a CNC milling machine using an Al-TiN coated milling tool. The experiments were performed at two different cutting speeds (100 m/min and 130 m/min), two different feed rates (0,08 mm/rev and 0,1 mm/rev), and a constant depth of cut (0,7 mm). Nanofluids were prepared by adding SiO2 nanoparticles to synthetic oil. Machinability was evaluated by considering surface roughness (Ra), cutting temperature (Tc), tool wear (Vb), and power consumption values. Among all the parameters evaluated, the best cooling-lubrication condition affecting machining performance was found to be the nanofluid containing 0.2 wt.% of SiO2 nanoparticles.