EKİCİ, Ergün Çanakkale Onsekiz Mart University - Faculty of Engineering - Dept of Industrial Engineering, Turkey , UZUN, Gültekin Gazi University - Faculty of Technical Education - Dept of Mechanical Education, Turkey , KIVAK, Turgay Düzce University - Faculty of Technology - Dept of Manufacturing Engineering, Turkey

EVALUATION OF THE EFFECTS OF CUTTING PARAMETERSON THE SURFACE ROUGHNESS DURING THE TURNING OFHADFIELD STEEL WITH RESPONSE SURFACE METHODOLOGY

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Hadfield steel (X120Mn12) is widely used in the engineering applications due to its excellentwear resistance. In this study, the effects of the cutting parameters on the surface roughness wereinvestigated in relation to the lathe process carried out on Hadfield steel. The experiments were conductedat a cutting speed of 80, 110, 140 m/min, feed rate of 0.2, 0.3, 0.4 mm/rev and depth of cut 0.2, 0.4, 0.6mm, using coated carbide tools. Regarding the evaluation of the machinability of Hadfield steel, a modelwas formed utilizing the response surface method (RSM). For the determination of the effects of the cuttingparameters on the surface roughness, the central composite design (CCD) and variance analysis (ANOVA)were used. By means of the model formed as a result of the experimental study, it was demonstrated thatamong the cutting parameters, the feed rate is the most effective parameter on the surface roughness, witha contribution ratio of 90.28%. It was determined that the surface roughness increases with increasing feedrate. With respect to the effect on the surface roughness, the feed rate was followed by the cutting speedwith a contribution ratio of 3.1% and the cutting depth with a contribution ratio of 1.7%.

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Hadfield Steel , Machinability , Surface Roughness , Response Surface Methodology

Uludağ University Journal of The Faculty of Engineering

28