Nov. 30, 2020
As a Graphite Electrodes Manufacturer, share it with you.
The bending strength of graphite electrode materials and the bending strength of graphite electrode materials are a direct reflection of the strength of the material, reflecting the compactness of the internal structure of the material. Graphite block is a kind of artificial graphite, and artificial graphite is made by artificial heating of coke products. Generally, if it is purified to make high purity, or carbon fiber, the added value is high. Graphite rods are often used as electric heating elements in high-temperature vacuum furnaces. The maximum operating temperature can reach 3000℃. It is easy to oxidize at high temperatures.
Except for vacuum, it can only be used in neutral or reducing atmospheres. Its thermal expansion coefficient is small, thermal conductivity is large, resistivity is (8~13)×10-6 Ω·m, processability is better than SiC, MoSi2 rod, high temperature resistance, extreme cold and extreme heat resistance, good price Cheaper. Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. It releases electric energy in the form of electric arc in an electric arc furnace. The conductors that heat and melt the charge can be divided into ordinary power, high power and ultra-high power according to their quality indicators. Graphite electrodes mainly include four types of ordinary power graphite electrodes, anti-oxidation coating graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes. The material has high strength, and its discharge wear resistance is relatively good. For the accuracy of the electrode, try to choose a material with better strength.
The average particle size of the graphite electrode material, the average particle size of the graphite electrode material (graphite powder, graphite block, etc.) directly affects the discharge conditions. Smaller average particle material, more uniform material discharge, more stable discharge state, and better surface quality. The larger the particles, the faster the discharge rate, and the smaller the loss of roughness. The discharge of different magnitudes of energy is mainly produced during the discharge process of different current intensity. However, the surface finish of the discharged particles will change with changes.
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