Cutting Tooth Material Of Diamond Drill Bit

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A diamond bit cutting teeth materials are divided into natural diamond and synthetic diamond. Diamond is a crystal of carbon. Its crystal structure is a regular tetrahedron. The carbon atoms are connected by covalent bonds. The structure is very stable. Typical shapes include cubes, octahedrons, and dodecahedrons.

Diamond is the hardest material among the materials known to man, with the strongest compressive strength and the highest wear resistance. Therefore, it is the most ideal material for cutting edges.

However, diamond also has a large weakness as a cutting edge cutting material. First, it is brittle and can cause cracks when subjected to impact loads. Second, its thermal stability is poor. At high temperatures, the diamond burns into carbon dioxide and carbon monoxide (carbonization). In air, between about 455 and 860 ° C, the diamond will appear graphitized combustion; in inert or reducing There is no oxidation in the gas, but at about 1430 ° C, the diamond crystals suddenly burst and become graphite. Therefore, the diamond bit must be designed, manufactured and used to avoid the high impact load of the diamond material and to ensure timely cooling of the diamond cutting teeth.

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