An experimental investigation of effect of turning AISI 1040 steel at low cutting speed on tool wear and surface roughness

Abstract

In this study, the effect of different cutting speeds on cutting tool wear and surface roughness was investigated in turning operation. Cylindrical bars of AISI 1040 steel was selected as workpiece materials during this investigations in turning process. The K type coated CVD(Chemical Vapor Deposition) TiAlN ceramic tungsten carbide cutting tools were used in turning of bars. Surface roughness of turned bars and tool wear were accepted as criteria for performance evaluation of these cutters. Tool wear was determined by performing SEM (scanning electron microscopy) and EDX (Energy Dispersive X-ray spectroscopy) analyses after conducting other experimental studies at a constant feed rate. Surface roughness values were also measured after every turning process. The aim of this study was to investigate the influence of cutting speed, especially low cutting speed on tool wear and surface roughness. According to experimental results, decreasing of cutting speed forces the cutting tool more and increasing of cutting speed not only causes more coating wear, but also increase radius of cutting nose. However, the best surface roughness could be obtained in turning process for max cutting speed.