抄録
In milling and drilling of heat-treated steels, such as die steels and high speed tool steels, machining a number of grooves or holes often causes severe wear or chipping of carbide tools. In order to machine hardened work materials with ease, new composite coatings and new shapes for carbide endmills and drills have been developed. (Al, Ti) N coatings deposited by cathodic arc ion plating exhibited higher hardness and higher oxidation resistance than those of TiN coatings, and new hard-type shapes yielded improved chipping resistance. These newly developed coated carbide cutting tools were evaluated through machining of various hardened work materials, and showed greatly improved performance, especially for high-hardness work materials.
