Knowledge of diamond tools

Users in the selection and use of diamond coated tool, you must learn about diamond cutting tools following sense:
(1) CVD diamond coated with amorphous diamond coating difference Diamond blade
Amorphous diamond (also called diamond-like carbon - Annotation) coatings are deposited using a PVD process carbon. It has a key part of the diamond SP3, SP2 also has

some carbon bond; their film hardness is high, but lower than the hardness of diamond film; thickness

Than we usually deposited diamond film to be thinner. Machining graphite, amorphous diamond coated tool life is uncoated carbide tools 2-3 times. In contrast, CVD

diamond deposition process is the use of a pure CVD diamond coating, machining of graphite

Carbide cutting tool life is 12-20 times, thereby reducing the number of tool changes to improve the reliability and accuracy of processing consistency.
(2) can not be hardened steel with diamond tooling
Diamond from carbon atoms. Certain materials when heated, sucked from the carbon atoms in diamond and carbide is formed in the workpiece. Iron is one such material.

Cutting tools with diamond iron group material, the friction generated heat causes diffusion of carbon atoms in diamond

To iron, resulting in diamond coatings due to chemical wear and premature failure.
(3) re-grinding and (or) heavy coating of diamond coated tools is difficult to guarantee the quality of the coating formed on the surface as the tool for the pure

diamond, so the tool with a diamond wheel for re-grinding takes a very long time. In addition, the growth of the diamond tool used. Preparation

Process will change the chemical properties of the tool surface, since the coating of this chemical properties requires very precise control, so the effect of the tool

recoating difficult to be guaranteed.
(4) diamond coated tool life varies
Like any other tool, diamond coated tool life varies, depending on the material to be cut, the choice of feed rate and cutting speed, and the geometry of the workpiece

and so on. Generally, diamond-coated graphite machining tool life is not coated

Carbide layer is 10 to 20 times, in some cases, may even be longer. This way, you can use a tool to complete almost any processing tasks without tool change due to

tool wear and to avoid disruption and recalibration process, making it possible to achieve unattended plus

Workers. The processing of the composite material, is entirely possible to obtain a longer tool life.
According to reports, in the processing of high-density glass fiber, carbon fiber and Gl0-FR4 other difficult machining composite materials, diamond-coated tool life

up to uncoated carbide tool 70 times.
(5) diamond coating spalling can prevent flaking coating of diamond-coated tools are a serious problem, but also a common problem (especially in the processing of

materials like carbon fiber), will lead to unpredictable tool life. The late 1990s, interfacial chemical properties

Is determined to affect the diamond coating adhesion important factor. By selecting good compatibility Carbide chemical characteristics, the use of appropriate

technology and reasonable pre-deposition reaction conditions, it is possible to reduce or eliminate the diamond coating flaking and stable real

Now smooth wear patterns. Observed under the microscope normal wear diamond coated tool, you can find the diamond was worn until stable carbide substrate, without

chipping or peeling.