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New method for processing polycrystalline diamond at high speed
Polycrystalline diamond is a large number of synthetic diamond crystals carefully selected by the product grade, and is added with various additives to be sintered at high temperature (1400 ° C) and high pressure (6000 MPa). It is a polycrystalline agglomerate with disordered orientation and staggered growth of diamond grains. Therefore, it has a hardness similar to that of natural diamond and better wear resistance than natural diamond. This advantage makes polycrystalline diamond widely used in drawing molds for various metal wires, petroleum geological drill bits, grinding wheel dressing pens and various tools. Polycrystalline diamond has certain electrical conductivity (but high electrical resistivity) and good thermal conductivity, while its melting point is high. Therefore