Vermi̇küler Grafi̇tli̇ Dökme Demi̇ri̇n İşlenebi̇li̇rli̇ği̇ni̇n Deneysel Olarak Araştirilmasi

Vermicular graphite cast iron, which is widely used in the automotive industry because of outstanding strenght properties. But, there are many problem with regard to machinability of this material. In this study, optimum cutting parameters were studied in order to improve machinability of vermicular graphite cast iron. Experiment parameters which is appropriate for ISO 3685 was selected. Depend on the cutting parameters, cutting forces was measured during the machining of experimental samples. The sintered carbide cutting tools which are in ISO K10 grade and coated 9 μm thickness with TiCN-Al2O3 TiN by Chemical Vapor Deposition (CVD) method, used in experiments. The experiments was carried out by turning at the conditions of four different cutting speeds (150, 170, 190 and 210 m/min) and at the constant cutting depth (2,5mm) without using cutting fluids. In the experimental study, the cutting forces known as the criterian of machinability were measured. The effects of selected cutting parameters on the cutting forces were investigated. The results showed that with regard to cutting force, the highest cutting forces measured on Perlitic+Ferritic vermicular graphite iron. Result of the experimental studies, the biggest (maximum) force was obtained on Ferritic+Perlitic graphite iron. Obtained result exhibit that optimum cutting value noticeable reduce cost of modern cutting tools and manufacturing cost thanks to decrease machining time.