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In twenty Century, copper was widely used as electrode material in EDM. At that time, only in the production of large electrodes and mold processing requirements are not high or rough machining, graphite materials will become an alternative. Some of the early contact with the graphite electrode of the technical staff have a general impression: the graphite material is dirty, surface effect is not good, the processing efficiency is not high, etc.. With the development of high and new technology, and constantly improve the manufacturing process of graphite material, can satisfy different EDM demand of graphite materials emerge in an endless stream, market graphite for high speed milling machine tool arises at the historic moment, numerical control electric spark machine…
The carbon carbon composite materials as excellent thermal structure, functional integration of Engineering materials, since its birth in 1958, it has been greatly developed in the military , the most important use is for the manufacture of missile warhead components. Due to its high temperature resistance, good wear. It has been widely used in solid rocket motor, aerospace structural parts of aircraft, aircraft and racing brake device, the heating element and mechanical fasteners, heat exchanger, aviation engine hot end components. The properties of carbon carbon composites: (1) The physical properties: the C / C composites after heat treatment in the chemical composition and elemental carbon higher than 99%, low density, has a strong affinity, due to the high melting point…
Carbon carbon composite material is a new type of high temperature material, with light weight, high modulus, high specific strength, low thermal expansion coefficient, high temperature resistance, heat shock resistance, corrosion resistance, good vibration absorption and so on. In the application, as an anti ablation, short time use of the material, carbon carbon composites have been successfully applied in the aerospace industry, such as rocket engine exhaust nozzle, throat lining, aerospace aircraft wing leading edge and so on. In the field of aerospace applications, the most successful example when the number of carbon carbon composite material brake disc, in this area has formed a mature market. Carbon carbon composite brake disk advantages mainly due to its own density, high temperature…
