Ultra-Precision Cutting of Titanium Alloy with the Formed Coated-Cemented-Carbide Cutting Tool

摘要

The difficuIt-to-cut metals are expected to be increasingly used as the high quality components in a wide field of industry because of their excellent mechanical and chemical properties. However, the ultra-precision cutting of difficult-to-cut metals is quite difficult because the wear rate of diamond tool is extremely high. There are several reports on ultra-precision cutting of steel by using ultra-precision machine with special expensive vibrator and high quality diamond tool. In our recent researches, it has been found that the coated-cemented-carbide tool which is put on the market as general cutting tool for hard materials is available for the ultra-precision cutting of the difficult-to-cut metals. The surface roughness of face-turned α -β titanium alloy and SUS316 surfaces attains below 100nm(P-V) without complicated and expensive devices. It is purpose of this paper to point out that the finished surface of β titanium alloy is improved by forming sharply a cutting edge of cemented-carbide tool by polishing technique.