C-19 TOOL WEAR AND SURFACE INTEGRITY WHEN DRY TURNING OF HARDENED D2 TOOL STEEL(Session: MIM/Tool)

抄録

The coated carbide cutting tools were used in dry cutting of D2 tool steel bar (60 HRc). Experiments were performed at various combinations of cutting speeds and feed rates. The results for hard turning operation showed that the flank wear increases with the cutting speed and feed rate. The flank wear occurs gradually at the beginning of machining and at the end of failure when VB_<max> reach 0.4 mm. The machined surface profiles with different cutting speed and feed rate were measured and the topography was observed using an electronic microscope. Tool life is inverse to cutting speed and feedrate The higher feed rate give the higher surface roughness The suitable cutting parameter values were determined for coated carbide tools when turning hardened tools steel.