What is the heat distribution ratio of DCEN on the plate and the electrode?

In Direct Current Electrode Negative (DCEN) configuration, the heat distribution during the gas tungsten arc welding process is characterized by a significant difference in heat intensity between the workpiece (plate) and the electrode. The correct answer indicates that one third of the heat is applied to the plate (the workpiece) while two thirds is concentrated on the electrode.

This heat distribution occurs because, in DCEN, the electron flow travels from the electrode to the workpiece. As a result, the electrode absorbs more heat due to its negative polarity, resulting in a greater amount of thermal energy being directed toward the electrode. This allows for better control of the arc and contributes to a more stable welding process, along with a higher melting capability of the electrode. The greater heat concentration on the electrode helps maintain its temperature and enables it to melt and deliver filler material more effectively into the weld joint.

Understanding this heat distribution is important for achieving optimal welding results, as it affects factors such as penetration, bead shape, and the feed rate of the filler material. This knowledge will contribute to making informed choices regarding welding settings and techniques in actual welding scenarios.