Wear behaviour of tungesten carbide coated insert in turning of Inconel 718

In this paper the waer behaviour of tungesten carbide coated insert in turning Inconel718 has been carried out. In this approach the modeling and experiment as well as wear mechanism map were used to understand the relationship between the cutting conditions and the wear mechanisms. In this research, the WC insert with TiAIN layer was chosen as a cutting tool. The most important variables under study in this work are the cutting velocity, feed rate, tool nose radius, entering angle and turning time. As a result, the recommended machining conditions with minimal wear would be the selection a tool with a radius of 1.6 mm. The results showed that the TiAIN layer acts as a protection against the transfer of elements between the tool and workpiece in mild and transient wear zones. However, with an increase in the cutting velocity and feed rate, i.e. moving in the severe wear zone, the TiA1N layer breaks off the tool surface resulting in a considerable increase in the adhesive wear due to the transfer of such elements in Inconel718 as Nickel, chrome and iron to the flank face.