LAUSR

Abstract In this study a pulsed magnetic treatment was attempted to improve the cutting performance of the TiAlN coated cBN turning tool and the effects of the strength of the pulsed magnetic field on the cutting force, wear surface, residual stress and the bonding force were investigated. It is found that the cutting performances of the coated tools are successfully improved with a relatively lower cutting force and a less wear area during the cutting process. The cutting force during the last feed is slightly decreased by approximately 4% when a 0.5 T field is used. Compared to the untreated tool, the tool treated with the 0.5 T field exhibits a decrease in the VB by 38.14% and a decrease in the wear area of the rake face by 35.92% respectively. The bonding force between the TiAlN coating and the cBN sintered body increases by 7.8% after the PMT due to an approximately 20% increase in the residual compressive stress around the cutting tip area. The underlying mechanism associated with the improved cutting performance is attributed to the multiplication of defects around the interface, which alters the residual stress and the bonding force between the coating and the cBN sintered body.