抄録
The propose of this study is to investigate the effect of built-up layer (BUL) on the tool flank wear rate and give the optimal cutting speed in cutting of difficult-to-cut material. Tool flank wear rate, machining efficiency and machining cost in cutting of Inconel 718 and Ti-6Al-4V with uncoated cemented carbide tools were analyzed. The results show that BUL has the tool protective effect and it can decrease tool flank wear rate. It is also confirmed that there is an exponential relationship between tool flank wear rate and cutting speed when cutting temperature is above 800℃. From the viewpoint of machining efficiency and machining cost, it can be concluded that the optimal cutting speed for utilizing BUL is 30 m/min for dry cutting Inconel 718, and 50 m/min for dry cutting Ti-6Al-4V when feed rate is 0.1 mm/rev.
