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The Characteristics of PCD Tools
May 16 , 2021

Diamond tools have the characteristics of high hardness, high compressive strength, good gain and wear resistance,etc. which can obtain high machining accuracy and machining efficiency in high-speed cutting. The characteristics of diamond tools are determined by the state of diamond crystals. In the crystal, the four valence electrons of carbon atoms form bonds according to the tetrahedral structure, and each carbon atom forms covalent bonds with four adjacent atoms, forming a slender diamond structure, which has strong binding force and directionality, thus the diamonds have extremely high hardness. Because the structure of polycrystalline diamond (PCD) is a fine diamond sintered body with different orientations, although the binder is added, its hardness and wear resistance are still lower than that of single crystal diamond. However, because the PCD sintered body is isotropic, it is not easy to crack along a single cleavage plane.

The main performance indicators of PCD tools:

  1. The hardness of PCD can reach 8000HV, which is 8-12 times that of cemented carbide;
  2. The 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;
  3. The friction coefficient of PCD is generally only 0.1—0.3 (the friction coefficient of cemented carbide is 0.4—1), so PCD tools can significantly reduce the cutting force;
  4. The 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, so PCD tools have small thermal deformation and high machining accuracy;
  5. The 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.

PCD diamond tools have been widely used in home and abroad for coating removal of concrete and terrazzo floor. Transgrindtools offers a wide range of PCD removal tooling and PCD grinding wheels with professional quality and competitive price to support you go thought you job effectively.

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