synthetic alternative to natural diamond

Currently, single crystal diamond, PCD (or PCD / CC), and were successfully used for CVD diamond turning, boring tools, drills, reamers, milling cutters, molding knives and other cutting tools Cutting part of the production materials.Varieties of diamond material must be based on the sand paper  nature of the material being processed and processing requirements to select, in addition to meet the technical requirements, but also to meet the economic and environmental performance requirements.PCD and PCD / CC materialPCD and PCD / CC is the most commonly used in the production of diamond material, it applies not only usually machining fields, but also widely used in automobiles, motorcycles, high-speed trains, petroleum, chemical, construction, wood processing, and aerospace and other industrial sectors. In the field of cars and motorcycles, PCD and PCD / CC suitable for machining aluminum engine piston skirt, pin hole, cylinder blocks, transmission, carburetor and other wear parts. Most of these components are relatively high silicon content (Si> 12%) of aluminum composite material of high hardness hard particles (such as high hardness of SiC-3000 ~ 3500HV) distributed in the alloy matrix, and if the wheel be the cbn grinding wheel  same as the abrasive grains from the cutting edge of the tool abrasion and impact action, leaving the cutting edge wear quickly. The higher the hardness of the hard particles, the larger the particle size, the greater the number of particles, the tool wear faster. Therefore, it is difficult using conventional machining of carbide cutting tools, tool life is very low or impossible to use. Diamond is the world's hardest substance known, the actual use of proven, it is the processing of aluminum matrix composites best tool material.With PCD diamond machining aluminum matrix composites, its cutting speed of tamping rammer  up to 800 ~ 1000m/min, tool life is several times higher than the carbide or even several times the surface roughness value of up Ra0.025 ~ 0.012μm. Figure 2 shows the drilling process with PCD tools 20% SiCυ of aluminum matrix composite spiral pump casing application examples.With PCD (or PCD / CC) tooling carbon fiber and glass fiber reinforced plastic (FRP), the chip into a powder, cutting temperature is low, and the length of class K carbide cutting tool 10 times, and not to hard wear carbide tool 1/3PCD (or PCD / CC) also applies to the processing tool after a burn-resistant carbide and non-metallic materials, such as ceramic, rubber, graphite, glass and various wear-resistant timberPCD tool performance depends primarily on its application and the process involved, but the choice of the appropriate grade and particle size can also affect it. Different varieties of PCD inserts, due to its composition of different cutting is very different, and selection must be noted.