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EDM is a new processing technology in machinery manufacturing industry, EDM of many high hardness metal processing, and processing of complex shape, high precision parts, can be used as a tool for the anode copper material, also can use graphite materials. Graphite material used as a tool electrode for electrical discharge machining must have the following conditions: (1) the structure is compact and uniform, and there should not be coarse particles and large pores; (2) has high mechanical strength, and good processing performance, can produce acute, flake shape or complex; ; (3) the graphite electrode, which has a certain loss in the process of EDM, which should be as low as possible; (4) the discharge characteristics are stable and the…
Foundry machinery industry in the extensive use of graphite materials as mould pressure casting, centrifugal casting, super hard alloy hot extrusion processing, to train wheels, small precision parts can be used in graphite mold. The graphite mould can be repeatedly used for many times, and the casting after the mold release has a high degree of finish, and some can be used without further processing. As the graphite casting mould should be compact and low coefficient of thermal expansion of graphite, good oxidation resistance, used for casting the larger size of the graphite can be composed of coarse grains and small precision parts for casting graphite must use the fine particle structure of graphite. China used to manufacture a large…
High purity graphite generally refers to the amount of carbon containing more than 99.99% of graphite in the organizational structure can be divided into three categories: coarse grain structure, fine grain structure and fine grain structure. The base material for integrated circuits is mainly single crystal silicon chip, silicon single crystal growth process is currently mainly used in Czochralski (CZ) method, and other methods of magnetic Czochralski method (MCZ), regional (FZ) method and double crucible pulling method, the total amount of single crystal silicon 80% monocrystalline silicon with the global electronics industry. Czochralski graphite furnace is monocrystalline silicon using consumables, high purity graphite materials into the heating system of monocrystalline silicon furnace. In 2005 China needs to be directly drawn…
