Graphite particles are also called graphite columns, small-sized graphite rods, graphite particles, etc. because of the different industries in which they are used, their names will be different. However, their products are the same, and they need to be processed from high-purity lubricating and conductive graphite raw materials. The two methods of making graphite particles have different effects. One is to use graphite powder and adhesive stirring extrusion molding, this kind of graphite particles are very soft, compressive strength is very small, the conductive effect is also greatly reduced, because there are a lot of adhesives, also affect the lubricity of graphite particles.
Graphite column used in guide sleeve, guide pillar, self-lubricating bearing and wear-resistant plate. First, it was produced in China in 1997, drawing on foreign products. The combination of domestic graphite column and self-made wear-resistant plate technology has made outstanding contributions to the development of China’s automobile industry, greatly improving the production efficiency of automobiles and reducing the cost of automobiles.
According to the principle of powder metallurgy, the copper / graphite composites were prepared by using graphite particles with larger particle size, in order to improve the lubrication performance of copper by adding graphite particles. The main process of mixing powder, pressing and sintering is simple and efficient. The effects of graphite particle size, graphite content, sintering temperature and holding time on the microstructure and appearance of copper / graphite composites were observed by hitachi-4800 cold field emission scanning electron microscope. The results show that the microstructure of Cu / graphite composite is mainly affected by the particle size and the amount of graphite. Adding more small-scale graphite particles can improve the cleavage effect of pure copper matrix.
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