Polycrystalline diamond (micro powder) is made of graphite with a unique directional blasting method. The shock wave of directional blasting of high explosive speed accelerates the flying speed of metal flyer and impacts the graphite flake, resulting in the transformation of graphite into polycrystalline diamond. Its structure is very similar to that of natural diamond. It is formed by the combination of unsaturated bond and has good toughness. Good market leads to many polycrystalline diamond suppliers.
Characteristics of polycrystalline diamond
It is formed by the aggregation of spherical microcrystals, the size of which is only 3-10nm. Excellent grinding performance: high removal rate, good toughness and self-sharpening. Compared with monocrystal diamond, it is more difficult to produce surface scratches and more suitable for grinding workpieces with different hardness materials.
Polycrystalline diamond tools are mainly used in the following two aspects:
(1) If common tools are employed in the processing of non-ferrous materials and non-ferrous metals, it is more likely to cause tool wear and low processing efficiency. Polycrystalline diamond tools can show excellent processing performance.
(2) For the processing of non-metallic materials, polycrystalline diamond tools are suitable for the processing of non-metallic materials, such as stone, hard carbon, carbon fiber reinforced plastics (CFRP) and wood-based panels.
Polycrystalline diamond tools can process at a higher speed, and the cutting speed is an important factor affecting the machining quality. With the premise of high-speed cutting, it can improve the machining efficiency of cutting tools, but due to the high hardness and brittleness of polycrystalline diamond tools, under the condition of high-speed rotation, the increase of cutting temperature and cutting force, the instantaneous collision between the tool and the cutting sample will cause brittle fracture of the tool tip, so the polycrystalline diamond tools need to be resharpened. Therefore, when machining different workpiece materials, the cutting speed of polycrystalline diamond tools should also be different.
Innogrind is one of polycrystalline diamond suppliers in China, from which you can get some information you need.