Abstract

The main objective of this article is to investigate the effects of nanoparticle concentration, cutting speed, and feed rate on surface roughness Ra in hard milling of Hardox 500 steel under Minimum Quantity Cooling Lubrication (MQCL) condition using Al2O3/MoS2 hybrid nano cutting oil. The factorial experimental planning design with the help of Minitab 21 software was applied to evaluate the main effects and interaction effects of input machining parameters. The obtained results reveal that feed rate has the largest influence on the objective function Ra. The technical guides for nanoparticle concentration, cutting speed, and feed rate were provided for smaller Ra values during hard milling of Hardox 500 steel. Moreover, NC=1.0-1.5%, V=106-110 m/min, and f=0.08-0.09 mm/tooth should be suggested for achieving the better machined surface quality.