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graphite electrode rod carbon graphite electrode
| Item | Unit | RP | HP | UHP | ||||
| 250-400 | 450-800 | 300-400 | 450-700 | 300-400 | 450-700 | |||
| Electric Resistivity | Electrode | μΩ.m | 7.5-8.6 | 7.5-8.8 | 5.5-6.8 | 5.5-7.0 | 4.6-6.0 | 4.8-6.2 |
| Nipple | 4.5-5.5 | 4.0-5.0 | 3.5-4.5 | |||||
| Bending Strength | Electrode | Mpa | ≥8.0 | ≥11.0 | ≥11.0 | |||
| Nipple | ≥15.0 | ≥16.0 | ≥18.0 | |||||
| Elastic Modulus | Electrode | Gpa | ≤9.0 | ≤11.0 | ≤13.0 | |||
| Nipple | ≤13.0 | ≤14.0 | ≤15.0 | |||||
| Bulk Density | Electrode | g/cm3 | 1.55-1.65 | 1.63-1.73 | 1.65-1.75 | |||
| Nipple | 1.70-1.75 | 1.73-1.80 | 1.75-1.82 | |||||
| Ash | Electrode | % | ≤0.3 | |||||
| Nipple | ||||||||
| CTE(100-600)ºC | Electrode | 10-6/ºC | 2.00-2.50 | 1.80-2.00 | 1.30-1.50 | |||
| Nipple | 1.50-1.80 | 1.50-1.80 | 1.20-1.40 | |||||
100-750mm Graphite Electrodes UHP HP RP Graphite Electrode for Eaf Lf Furnace
Secondly, the processing technology of graphite electrodes will also affect their quality. In the manufacturing process of graphite electrodes, multiple processes of processing and sintering are required. During the processing, if high-precision cutting and sintering processes are used, the dimensional accuracy and surface quality of the graphite electrode can be guaranteed, and the service life of the electrode can be improved. If the processing technology is unreasonable or improperly controlled, it is easy to cause burrs and cracks on the electrode surface, thereby reducing the quality and life of the electrode. Therefore, high-priced graphite electrodes often use more complex and precise processing technology and have better quality.
In addition, the wear resistance of graphite electrodes is also one of the important indicators for evaluating their quality. During the EDM process, friction and wear will occur between the electrode and the workpiece, so the electrode is required to have high hardness and wear resistance. Graphite electrodes with higher prices usually use higher graphite density and better heat treatment process, and have higher wear resistance, so they can better resist wear and extend the service life of the electrode. Low-priced graphite electrodes may lack wear resistance, resulting in a shorter service life of the electrode. In summary, EDM graphite electrodes with different prices often have certain differences in quality.
This is because graphite electrodes of different prices have differences in materials, processing technology and wear resistance. Of course, high-priced graphite electrodes are not necessarily always of better quality, and low-priced graphite electrodes are not necessarily of poor quality. When purchasing graphite electrodes, we should choose according to actual needs and budget, and pay attention to its materials, processing technology and wear resistance and other indicators to ensure that the quality of the purchased electrodes meets expectations and can meet our processing needs.
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