Author/Authors :
IŞIK, Yahya Uludag University - Vocational School of Technical Sciences, Turkey
Title Of Article :
THE PERFORMANCE EVALUTION OF CERAMIC ANDCARBIDE CUTTING TOOLS IN MACHINING OFAUSTEMEPERED DUCTILE IRONS
Abstract :
The aim of this research is to compare TiN (PVD) coated Al2O3+Ti[C,N] mixed alumina-based(KY4400) ceramic and CVD coated carbide TiC+AI2O3+TiN (ISO P25) cutting tools in turningaustempered ductile irons. Ductile cast iron samples were austenitized at 927°C and subsequentlyaustempered for 1 hour at 400°C. The hardness of the workpiece material was measured and found to be43.5 HRC. In the present work a series of tests were conducted in order to evaluate the tool performancesby adopting tool life. In all experiments cutting forces, flank wear and surface roughness values weremeasured throughout the tool life. No cutting fluid was used during the turning operations. Study of thetool life and failure modes shows that tool life was determined by the flank wear and surface roughnessgenerated on the workpiece. The main conclusion is that tool life of ceramic insert was longer than thecoated carbide insert although much higher cutting speeds were used.
NaturalLanguageKeyword :
ceramics , wear , tool life , cutting force , ductile iron
JournalTitle :
Uludağ University Journal of The Faculty of Engineering
