1)It has extremely high hardness. The hardness of polycrystalline diamond is HV7500~9000, second only to natural diamond. Due to the high toughness of cemented carbide support, the composite flexural strength can reach 1500MPa.
2)It has high abrasion resistance. The wear resistance of polycrystalline diamond is generally 60 to 80 times of cemented carbide. Extreme durability when cutting non-metallic materials with high hardness (>HV1500).
3)With a low coefficient of friction. The friction factor between polycrystalline diamond and non-ferrous metals is 0.1 to 0.3, while the friction factor between cemented carbide and non-ferrous metals is 0.3 to 0.6. PCD tools made of polycrystalline diamond can reduce the cutting force and cutting temperature by about 1/2 to 1/3 compared with cemented carbide tools.
4)It has high thermal conductivity. The thermal conductivity of polycrystalline diamond is 1.5 to 7 times of cemented carbide, which can greatly reduce the cutting area’s temperature and improve the tool’s durability.
5)Has a small coefficient of expansion. The linear expansion coefficient of polycrystalline diamond is very small, about 1/10 of general steel. In addition, because the blade is sharp, the hardening degree of the machined surface is only about 1/3 of the cemented carbide tool, so the machining accuracy is good.
6)It can be made into various sizes and shapes as needed.
7) It shows obviously superior toughness and impact resistance than single crystal diamond, which makes up for the shortcomings of single crystal diamond with large brittleness.
