A Comparative Study of the Performance of Uncoated, PVD, CVD and MTCVD Coated Carbide Inserts in Dry Turning of AISI4140 Steel

An experimental study has been carried out to investigate and compare the cutting tool performances represented by insert wear, surface roughness forces of an uncoated carbide (H13A) three coated carbides GC2015 ( TiCN / Al2O3 TiN ), GC1015 (TiN) GC4215 ) during dry turning AISI4140 steel. Turning was 5 minutes on cylindrical specimens (80 mm diameter 400 length) along with a depth 0.5 mm, feed rate 0.08 mm/rev, speed 350 m/min. The wear results show effectiveness both inserts where flank monolayer (GC1015) reaches approximately 2 times that bilayer (GC4215) 4-times multilayer (GC2015), while H13A demonstrated highest wear. Moreover, SEM analysis shows abrasion, adhesion chipping are dominant mechanisms. quality obtained is found be 1.38, 1.63 4.63 better than those GC4215, respectively. Finally, (CVD) identified as leading material in terms force ratios Ft-GC4215 Ft-GC2015 = 1.05, Ft-GC1015 1.13 Ft-H13A 1.77.