The manufacturing process of PCD for natural diamond polishing
Publishing time：
Oct 29,2021
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PCD for natural diamond polishing manufacturers tell you that diamond tools have the characteristics of high hardness, high compressive strength, good thermal conductivity and wear resistance, and can achieve high machining accuracy and machining efficiency in high-speed cutting.
PCD for natural diamond polishing manufacturers tell you that diamond tools have the characteristics of high hardness, high compressive strength, good thermal conductivity and wear resistance, and can achieve high machining accuracy and machining efficiency in high-speed cutting. The PCD for natural diamond polishing manufacturer tells you that the above-mentioned characteristics of diamond tools are determined by the state of diamond crystals. In diamond crystals, the four valence electrons of carbon atoms form bonds according to a tetrahedral structure, and each carbon atom forms a covalent bond with four adjacent atoms to form a diamond structure. This structure has strong binding force and directionality. So that the diamond has extremely high hardness.
The PCD for natural diamond polishing manufacturer tells you that because the structure of polycrystalline diamond (PCD) is a fine-grained 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 manufacturing process of PCD tools mainly includes two stages:
1. The manufacture of PCD composite sheet: PCD composite sheet is made of natural or synthetic diamond powder and bonding agent (containing cobalt, nickel and other metals) in a certain proportion at high temperature (1000～2000℃), high pressure (50,000～100,000) It is sintered under a atmospheric pressure). The PCD for natural diamond polishing manufacturer tells you that during the sintering process, due to the addition of the binder, the diamond crystals form a bonding bridge with TiC, SiC, Fe, Co, Ni, etc. as the main components, and the diamond crystals are embedded in the form of covalent bonds. In the framework of the bonding bridge. Usually the composite sheet is made into a disc with a fixed diameter and thickness, and the sintered composite sheet needs to be ground and polished and other corresponding physical and chemical treatments.
2. The processing of PCD blades: PCD for natural diamond polishing manufacturers tell you that the processing of PCD blades mainly includes the steps of cutting the composite sheet, welding the blade, and sharpening the blade.
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