How to Increase the Service Life of Graphite Mold?

Apr. 15, 2020

As a Graphite Electrodes Supplier, share with you. With the continuous development of China's high-tech technology in today's society, the application of graphite molds in people's daily life is very common in order to improve the efficiency of his application. How do people improve the use of graphite molds in China What about the period?

Graphite Electrodes

Graphite Electrodes

1. The method used for manufacturing graphite molds should be used in the manufacturing process of cutting to improve the smoothness of the surface of the graphite mold, using metallic materials to reduce adhesion and level of fusion between high purity graphite. Graphite rods are commonly used in electric heaters of high-temperature vacuum furnaces. The maximum operating temperature can reach 3000°C. It is easy to oxidize at high temperatures. Except for vacuum, it can only be used in a neutral atmosphere or a reducing atmosphere. It has a small thermal expansion coefficient, a large thermal conductivity, a resistivity of (8~13)×10-6 Ω·m, better workability than SiC and MoSi2 rods, high temperature resistance, excellent cold and extreme heat resistance, and price Cheaper. The graphite electrode is mainly made of petroleum coke and needle coke as raw materials, and coal pitch is used as a binder. It is made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. It releases electrical energy in the form of an electric arc in an electric arc furnace. The conductor that heats and melts the charge can be divided into ordinary power, high power and ultra-high power according to its quality index. Graphite Electrodes mainly includes four types of ordinary power graphite electrode, oxidation-resistant coated graphite electrode, high power graphite electrode and ultra high power graphite electrode. Graphite block is a kind of artificial graphite, and artificial graphite is made by manual heating of coke products. Generally, if the purification is made for high purity or carbon fiber, the added value is higher. The carcass powder component is a result of one of the elements in the plastic film of the high-purity graphite adhesive metal material. Because iron is a strong carburizing agent; if the carcass is iron-based, in the center of the carcass, the grinding wheel and melting conditions can be significantly reflected, causing high-purity graphite to adhere to the molten matrix and destroy the graphite mold. He proposed an iron-based matrix during firing, the abrasive blade and the mold release agent during the unloading of the mold strongly reduced the adhesion of the abrasive condition on the surface, reducing the level of damage to improve the abrasive used.

2. The fracture and failure of the grinding tool is also related to the resistance of the graphite material. As the temperature increases, the compressive strength of graphite increases with the temperature. At 1000 ℃, the compressive strength of high-purity graphite is increased by about 20% compared with the indoor temperature. Therefore, the graphite material with low resistance is used for rapid heating. The graphite molds contacted by the blades increase rapidly, which is not easy to cause fracturing.

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