Tungsten Electrodes For Resistance Welding

The Tungsten electrodes for resistance welding is made of materials with a high melting point, corrosion resistance, high density, good thermal conductivity, and electrical conductivity. Tungsten electrodes for resistance welding are widely used in welding in their properties. Tungsten electrodes for resistance welding are ground or polished black rods. The final colors are all different, and the tungsten content is also different, and the difference can be distinguished.

The Tungsten electrodes for resistance welding is used for TIG welding, which is a tungsten alloy bar made by adding about 0.3%-5% rare earth elements such as cerium, thorium, lanthanum, zirconium, yttrium, etc. in the tungsten matrix by powder metallurgy. Press machined, diameters from 0.25 to 6.4mm, standard lengths from 75 to 600, and the most commonly used sizes are diameters 1.0, 1.6, 2.4, and 3.2, the shape of the electrode tip is an important factor for TIG, when When using DCSP, the electrode tip needs to be sharpened, and the tip angle varies with the application range, electrode diameter, and welding current. Narrow joints require a smaller tip angle. When welding very thin materials, it is necessary for A low current, the needle-like minimum electrode is used to stabilize the arc, while a properly grounded electrode ensures easy arc ignition, good arc stability, and proper bead width. When welding with AC power, it is not necessary to grind the electrode tip, because, with the proper welding current, the electrode tip will form a hemispherical shape. If the welding current is increased, the electrode tip will become a bulb shape and may melt and contaminate the molten gold.

Tungsten electrodes for resistance welding plays an important role in arc starting, arc stability, and welding quality in argon tungsten arc welding. The mass loss of the tungsten electrode occurs under the high temperature of the arc, which is called the ablation of the tungsten electrode. To facilitate the discussion of the ablation mechanism of tungsten electrodes, ablation can be divided into ablation of added oxides and ablation of tungsten itself.

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