Consideration of the adhesion mechanism of Ti alloys using a cemented carbide tool during the cutting process

In this study, solid-state diffusion bonding between Ti alloys and a cemented carbide tool was explored, and then the bonded interface of the joints was observed in detail. Moreover, a high-temperature 4-point bending test of the bonded joints was carried out. Then, the reaction phenomenon between the work material, and the tool and the high-temperature strength of the bonded interface were evaluated, and the adhesion mechanism was examined. It was concluded that βC Ti alloy bonded easily to the cemented carbide tool during cutting and moreover, the bonding strength might be high because of the layered TiC phase. Therefore, the possibility of fracture inside the cemented carbide became high, and thus the tool life became lower.