What is the Reason for Using Graphite Electrodes Instead of Copper Electrodes?

Jun. 09, 2021

As a Graphite Electrodes Manufacturer, I would like to share with you graphite electrodes.

Ink materials are composed of industrial materials. Graphite carbon materials are the rapid development of materials in the traditional industrial industry, which not only increases the number of uses (metallurgy, chemistry, machinery), and its application has been extended to a wider range of high-tech Fields, such as: aerospace, aviation, electronics, electricity, communications, nuclear industry, precision machinery, biology, and environmental protection. Graphite block is a kind of artificial graphite, and artificial graphite is made by artificial heating of coke products.

Graphite Electrodes

Graphite Electrodes

Generally, if it is purified to make high-purity or carbon fiber, the added value is high. Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and are made through calcination, batching, kneading, pressing, roasting, graphitization, and machining. It releases electric energy in the form of an electric arc in an electric arc furnace. The conductors that heat and melt the charge can be classified 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. Graphite rods are often used as electric heating elements in 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 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.

The Graphite Electrodes processed by this paper is a cold isostatic pressing high-performance isotropic graphite electrode material, which is widely used in foreign countries, 95% or more of the users in the United States choose EDM graphite as the electrode material, and in other industrialized countries , Such as Japan and Switzerland, EDM graphite electrode materials also occupy a major position. In recent years, graphite can be used as an electrode material in my country's traditional automotive, household appliances, communications and electronics industry related products in the mold EDM technology manufacturing field has become increasingly widespread. The density of graphite is about 1.55 to 1.859/em3, which is only 1/5 of the density of copper. At the same time, because graphite can be bonded, it can be used to produce large electrodes with complex shapes.

Compared with the research of copper electrode materials, graphite has certain advantages such as high strength, low electrode consumption and small thermal deformation. It is especially suitable for complex cavity molds with special educational structures such as thin walls, fins and micro holes during processing. Graphite electrode materials have gradually developed to replace copper electrode systems and become the mainstream of electrode materials for EDM.

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