Experimental Investigations on Cryogenic Cooling in the Drilling of AISI 1045 Steel

In this study, experimental investigations were carried out in a drilling operation on medium-carbon steel material using a conventional coolant and a liquid nitrogen (LN2) coolant separately. The variables in the experiment were cutting speed (V (c)) and feed (f), while the drilling depth was maintained constant. The cutting temperature (T), thrust force (F (t)), and surface roughness (R (a)) were analyzed. The results of the experiment indicate that there is 6% to 51% reduction in cutting temperature when LN2 is used. At lower feed rates, the thrust force increased by 6% to 32% in LN2 cooling conditions, and at higher feed rates, the thrust force decreased of 4% to 8% in LN2 cooling conditions.