The changes for mechanical properties of nitrogen ion implanted micro drill

Cobalt cemented tungsten carbide(WC-Co) are used in a variety of important industrial components and parts, such as cutting tools, milling tools, mechanical face seals, drills, punches, submersible pumps, and so on. In recent years, PCB micro drills tend to be more minimized increasingly as the electronics components have been more highly accumulated and minimized. Coating processing such CVD and PVD for cutting tools is caused alteration of tool shape and dimensions as well as abruption of intermixing between the bulk and the treated layer. Therefore such coating processing is inadequate method which is applied to the surface treatment of the precision mechanical parts with submicrometer tolerances. But ion implantation is a surface modification technology in which atoms or molecules are ionized, accelerated to tens or hundreds keV of energies, and then implanted to the target materials. Nitrogen implantation in metals and metallic alloys generally improves surface properties, with the objectives of ensuring a low friction coefficient or surface hardening and producing protective or anticorrosion coatings as well as no influence on surface finish, tool shape and dimension although shallow implanted depth. This article reports the study of the changes for mechanical properties of nitrogen ion implanted micro drill