Currently the main diamond processing method has the following four: film-coated tools, welding thick-film diamond cutting tools, diamond cutting tools and single-crystal diamond sintered body tool.

Thin Film Coated Tools

Film-coated tools are rigid and high-temperature characteristics of a good collective material deposited diamond film is formed by chemical vapor deposition (cvd) tool. Since sin4 ceramics, wc + thermal expansion coefficient of diamond and carbide-based metal w co close, small thermal stress generated during film, it can be used as the base material of the cutter body. wc + co-based alloy, the binder phase co existence between easy to make diamond film and the substrate is formed of graphite and reduce the adhesive strength, the need for pre-treatment prior to deposition in order to eliminate the influence of co (typically by acid etching to co) .

Chemical vapor deposition method is the use of certain of the source gas containing activated c, at very low gas pressure, so that the carbon atoms deposited in a certain area, the carbon atoms in the condensed, forming a diamond-phase deposition process. Currently used for the deposition of diamond cvd law include: microwave, hot filament, DC arc jet method.

Advantages of diamond film is used in a variety of complex geometry tools, such as a blade with a chip, end mills, reamers and drills; can be used to cut a number of non-metallic materials, cutting force when cutting small, small deformation, smooth, abrasion slow, easy deformation of the workpiece for good workpiece material, finishing tolerances. The main disadvantage is the poor adhesion of diamond film and the substrate, the diamond film does not have a throwaway character.