We stipulate that the positive pole of the workpiece is connected to the positive pole, and the negative pole of the workpiece is connected to the reverse pole. Because the temperature of the anode region is high during DC arc welding, the heat is high, the temperature in the cathode region is relatively low, and the heat obtained is relatively small. Therefore, when the positive electrode is at a higher temperature than the reverse electrode temperature, the heat obtained is also high, but The reverse pole operating arc is relatively stable.
Therefore, the welded thick steel plate can use the positive electrode for the acid electrode and the reverse electrode for the welded steel plate. When using low-hydrogen sodium alkaline electrode (J507, E5015), DC reverse connection must be used to ensure stable combustion of the arc.
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