lf eaf graphite electrode
EDM characteristics of lf eaf graphite electrode material
1 Electric discharge machining speed lf eaf graphite electrode is a non-metallic material with a very high melting point of 3 650 ℃, while the melting point of copper is 1083 ℃, so lf eaf graphite electrode can withstand larger current setting conditions. When the discharge area and the size of the lf eaf graphite electrode are scaled larger, the superiority of the graphite material’s high-efficiency rough machining is more obvious. The thermal conductivity of graphite is 1/3 of copper, and the heat generated during the discharge process can be used to remove metal materials more effectively. Therefore, its processing efficiency is also higher than that of copper lf eaf graphite electrode in medium and fine processing. According to machining experience, under the correct conditions of use, the electrical discharge machining speed of the lf eaf graphite electrode is 1.5 to 2 times faster than that of the copper lf eaf graphite electrode as a whole.
2 Loss of lf eaf graphite electrode lf eaf graphite electrode has the characteristics of being able to withstand high current conditions. In addition, under appropriate roughing conditions, the erosion products and working fluid produced during processing of carbon-containing steel workpieces are at high temperatures. The carbon particles in the decomposition product produced under the effect of polarity, part of the ablation and carbon particles will adhere to the surface of the lf eaf graphite electrode to form a protective layer, which ensures that the lf eaf graphite electrode is in the rough processing The loss is extremely small, even “zero loss”. The main loss of lf eaf graphite electrode in EDM comes from rough machining. Although the loss rate of finishing setting conditions is relatively high, because the reserved machining allowance of parts is not much, the amount of machining erosion is small, and the overall loss is Also less. In general, the loss of the lf eaf graphite electrode in the rough machining of high current is less than that of the copper lf eaf graphite electrode, and the loss in the finishing process may be slightly greater than that of the copper lf eaf graphite electrode. The loss of the lf eaf graphite electrode of the two is equivalent. .
3 Surface quality
The particle diameter of graphite material directly affects the surface roughness of EDM. The smaller the diameter, the lower the surface roughness value can be obtained. A few years ago, graphite materials with a particle diameter of φ5 μm were used, and the best surface for EDM can only reach VDI18 (Ra0.8 μm). Nowadays, the particle diameter of graphite materials can reach within φ3 μm, which is the best surface for EDM. It can stably reach VDI12 (Ra0.4 μm) or a finer level, but the lf eaf graphite electrode cannot be used for mirror EDM. The resistivity of copper material is low, and the structure is dense. EDM is easy to obtain a stable processing state, and it can be processed stably under difficult conditions. The surface roughness can be less than Ra0.1 μm, and it can be mirrored EDM.
When the carbon company was founded, it established the development strategy of “Technology, Innovation, Leading”, adhering to the business philosophy of “Quality First, Service First”, after process improvement, quality improvement, market development, Hongsheng Carbon has become the largest graphitization processing company in Shanxi, Hebei, and Mongolia. Its main business includes lf eaf graphite electrode, Shijiazhuang lf eaf graphite electrode, and Datong silicon carbide. Tel: