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Graphite has high temperature strength, low thermal expansion coefficient, good mach inability and good heat and conductivity, so graphite electrode is widely used in metallurgy, electric furnace, EDM and other fields. In the field of EDM, the development of new graphite electrode material and its processing technology expands the application range of EDM and improves its performance. Compared with the graphite electrode and the copper electrode has the advantages of electrode consumption, fast processing speed, good machining performance, high processing precision, small thermal deformation, light weight, high temperature resistance, easy processing, surface processing of high temperature, electrode bonding etc.. Although graphite is a very easy cutting material, but because the graphite materials used for EDM electrode must have sufficient strength…
Graphite is an important strategic resource，and China’s graphite resource reserves and production rank the first in the world. High purity graphite has excellent performance and graphite products are widely used. Purification of graphite is the premise and basis of graphite products application，therefore the performance and application of graphite products are directly affected by the purity of graphite. Graphite resource and production and consumption in China and the rest of the world are presented. The main methods for purification of graphite are discussed，and the research progress of graphite purification are reviewed from several aspects，including flotation method， alkali-acid processing method，hydrofluoric acid washing，chloridizing roasting and high temperature purification. After comparing the advantages and disadvantages of each method，the development direction and prospect of graphite…
The carbon fiber-reinforced polymer material are made of high strength carbon fiber and vinyl resin by pultrusion process and winding twining and coating technology. The product features of the CFRP material: light quality and high strength . The most outstanding advantage of CFRP material is that it has high specific strength (ultimate strength / relative bulk density), which is usually called light quality and high strength.. The good corrosion resistance. CFRP can resist chemical corrosion in acid, alkali, chloride and humid environment, which is difficult to reach by traditional structural materials. The elastic properties of CFRP material are good, the stress-strain curve is close to linear, and it can restore the original state after the larger deformation, and the plastic…
