In metal cutting process, modeling and predicting the tool wear development has been researched for decades. Many efforts have been made to study the cutting temperature as an indicator for the tool wear behavior. However, the determination of the cutting temperature in the critical contact area in process is still a challenge.

In order to build temperature-dependent tool wear models, the temperature distribution of the workpiece was captured in this paper by an infrared thermography in orthogonal cutting of Direct Aged Inconel 718 with cemented carbide cutting tool WC-15Co. Instead of studying the temperature in critical cutting zone directly, the workpiece temperature distribution around the flank wear surface was determined inversely with the analytical Jaeger-solution based on the experimental data. The determined maximum cutting temperature on the flank wear surface has been successfully verified by FEM chip formation simulations. By means of this inverse approach, the cutting temperature on the flank surface can be determined as a function of tool wear VB. The experimental results showed that the cutting temperature increased with the increase of the tool wear VB. By means of this method, the temperature on the flank wear surface can be used as an important physical indicator to model and predict the tool wear development in future work.

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