Abstract
This paper investigates the machinability of Ti-6Al-6V-2Sn titanium alloy from the viewpoints of cutting temperature and tool wear. Finite element temperature analysis shows that tool tip temperature decreases with increasing heat conductivity of a cutting tool. Either a diamond or a special tool which enhances heat conduction near the tool tip is recommended for finish turning of the titanium alloy since reduced tool face temperature is favorite for the prolongation of tool life. Using a diamond tool at a cutting speed of more than 105 m/min, not only the cutting efficiency is improved but also the cuttting costs are lessened in comparison with using a straight tungsten carbide tool. A heat pipe-embedded cutting tool is also shown to be effective for the reduction of tool wear.
