The machinability of different ductile cast irons having different mechanical properties have been studied in terms of surface quality and tool life with the help of the Taguchi method. Solid solution reinforced ferritic spheroidal cast iron (SSF), and spheroidal cast iron (GJS) were selected for machining comparison, as SSF is a new material according to GJS. The tests were performed at a CNC turning machine with five control factors. They were used three levels of cutting velocity (200 m/min, 250 m/min, 300 m/min,), three levels of feed (0,1 mm/rev, 0,2 mm/rev, 0,3 mm/rev) and three levels of cutting depth (0,5 mm, 1 mm, 1,5 mm). Two types of tool holders with 60o and 93oclearance angles and two types of cutting conditions, wet and dry, were used. Also, the maximum temperature was measured by the infrared thermal scanner during the dry cutting processes. A taguchi L36 orthogonal array was used to determine the experiment design. Finally, the effects of these factors on the machinability of these materials have been compared, and the optimal cutting combination was determined in terms of surface quality and tool wear. The effect of temperature was also associated with the control factors.
Işik et al. (Fri,) studied this question.