ダイヤモンドバイトによるチタン合金の超精密切削の試み

抄録

Using single crystal diamond tool, in the previous research, the ultra-precision cutting of titanium metals is examined roughly at the depth of cut over 5 μm. The huge wear of diamond tool is observed at the short cutting length and the surface roughness becomes over 200 nm (Rz). In the report, the ultra-precision cutting of β titanium alloy (Ti-22V-4Al) at low depth of cut of 1 μm with diamond tool is tried. From the results, the high crystal grain boundary step observed at large depth of cut is not found on the finished surface. The surface roughness below 100 nm (Rz) and below 200 nm (Rz) is formed at the initial cutting process and kept until the cutting length of 20,000 m, respectively, though the light wear of diamond tool occurs.