As an intermediate carrier, the joint plays the role of connecting two graphite electrodes. Therefore, its performance must be better than that of graphite electrodes. If it is connected to ordinary power graphite electrodes, the performance of the joint should be high power. , Density, flexural strength should be high, and resistance should be low. Similarly, when connecting high-power graphite electrodes, the performance of the joint should be ultra-high-power, three-immersion and four-baking. If the ultra-high-power graphite electrode is connected, the joint is through four-immersion Three-baked, and then, is the precision of the machining. The joints we process are tapered and lengthened with four buckles, so that the connection is tighter and firmer than the standard three-buckle, and the joint plays the greatest role.