Classification of diamond tools

Natural diamond (ND) Tool
As a natural diamond pull vine peak spectrum, has the following characteristics:
(A) is displayed at the 1332 Rush existence diamond.
(2) wave amplitude (FWHM) of 4.1cm-1
Displayed as pure diamond. ND is the hardest known mineral substances, mainly for the preparation of turning tools. Fine grinding of natural diamond tool edge radius of up to 0.01 ~ 0.002μm. Where natural single crystal diamond (Single Crystalline Diamond, SCD) cutting edge parts by high magnification 1500x still observed blade smooth. Ra SCD when turning aluminum pistons reach 4μm, and in the same conditions using PCD cutting tool machining time of the surface roughness Ra of 15 ~ 50μm. So the cutting discs  use of SCD tool with precision lathes for precision and ultra-precision machining, get the mirror surface.
Polycrystalline diamond (PCD) cutting tools
PCD is a high temperature high pressure conditions by cobalt and other metal-bonded to synthetic diamond powder sintered polycrystalline material gathered, also known as sintered diamond. Overall sintered polycrystalline diamond cutter cutter for milling, PCD grain was disordered arrangement state, is isotropic, uniform hardness, graphitization temperature is 550 ℃. Tool has high hardness, high thermal conductivity, low thermal expansion coefficient, high elastic modulus and a low coefficient of friction. They are very sharp and so on.
Synthetic polycrystalline diamond compact (PDC) cutter
In order to improve the toughness of PCD inserts and weldability, often made of PCD and carbide cutter body synthetic polycrystalline diamond composite blade (PDc). The surface of the cemented carbide substrate being suppressed 0.5 ~ 1mm thick layer of sintered PCD. The flexural strength of the composite blade with carbide consistent hardness close to PCD, PCD can replace the use. PCD and synthetic polycrystalline diamond compact (PDC) cutter sharp edge and workpiece surface quality than ND. While its workability is poor, the grinding ratio is small, it is difficult according to the turbo diamond blade  geometry of any head shape. Current use of synthetic polycrystalline diamond compact Preparation Tool only, still can not be manufactured with chipbreaker indexable inserts and complex three-dimensional surface geometry cutter.
CVD diamond films (TDF) Soldering Tool
Thick welded diamond cutting tool is good to laser welded to a CVD diamond thick film substrate (usually a class K carbide) to form a composite sheet, and then polishing composite sheet, the second welded to the tool body, sharpening as needed the shape and edge. Figure 3 (a) shows, for the CVD diamond films (diamond film thickness of 30μm), with high hardness, wear resistance, low coefficient of friction, etc., is to create cutting non-ferrous metals and non-metallic materials, the ideal tool materials. Because diamond welding process complex process, CVD diamond films (TDF) welding tool yet high-volume applications.
Diamond coated tools
Diamond coated tools are directly in the cemented carbide by a CVD method (K class carbide) or ceramic layer deposited on the substrate 1 ~ 25μm diamond films, no cleavage plane isotropic. Figure 3 (b). Film coated tool hardness of 9800 ~ 10000HV. High thermal conductivity, thermal conductivity at room temperature up to 2000W · m-1 · K-1, while the carbide thermal conductivity is only 80 ~ 100m-1 · K-1. Diamond CVD method may be coated to any complex shape of the tool, which is polycrystalline diamond can have the most significant advantages.
Cubic boron nitride (PCBN) cutting tools
Cubic boron nitride (PCBN) following the  hole saw blades synthetic diamond hard appears after the second inorganic material, the hardness slightly inferior to diamond, thermal stability, good heat resistance up to 1400 to 1500 degrees, the heat resistance than diamond Xing (700-800 degrees) is almost twice as high. cubic boron nitride (PCBN) cutting tools is mainly suitable for processing a variety of ferrous metals and their alloys; most suitable for a variety of hardened steel (carbon tool steel, bearing steel, high speed tool steel steel) pearlitic gray cast iron (cast iron vanadium and titanium) chilled cast superalloys (nickel base alloy cobalt-based alloys) and surface coating welding processing. has a long life and reduce the number of tool changes, compensation down the time spent, for NC machine tools and automated production line efficiency can be more fully exploited, can change the traditional mechanical processing methods (ie, before quenching with a tool with a grinding wheel roughing and finishing after quenching method), which can be in a quenching CNC machine tools after quenching before turning (turning instead of grinding), with good economic benefits.