Performance analysis of cryogenically treated carbide drills in drilling white cast iron

The Drilling experiments were conducted using nontreated, cryogenically treated and tempered carbide tipped drills at various levels of cutting speed, feed, and tool conditions on thrust, torque and surface roughness of drilled holes. The experimental layout was designed based on the Taguchi's Orthogonal Array technique. Experimental results were analyzed using ANOVA, SEM and Grey Taguchi relational method. Cryogenically treated (CT) and cryogenically treated and double tempered (CTT2) inserts showed superior results in terms of reduced forces, tool wear and surface roughness of the drilled holes.