Main Indicators Of Polycrystalline Diamond Tools

① The hardness of PCD can reach 8000HV, which is 8-12 times that of cemented carbide;

②The thermal conductivity of PCD is 700W/mK, which is 1.5-9 times that of cemented carbide, even higher than PCBN and copper, so the heat transfer of PCD tools is rapid;

③The friction coefficient of PCD is generally only 0.1 to 0.3 (the friction coefficient of cemented carbide is 0.4 to 1), so PCD tools can significantly reduce the cutting force;

④The thermal expansion coefficient of PCD is only 0.9×10^-6～1.18×10^-6, which is only 1/5 of that of cemented carbide. Therefore, the thermal deformation of PCD tools is small and the machining accuracy is high;

⑤The affinity between PCD tools and non-ferrous metals and non-metallic materials is very small, and the chips are not easy to adhere to the tool tip during the machining process to form a built-up edge.