Tungsten needle with two tips may be a sharpened pure tungsten needle, a sharpened tungsten alloy needle or a sharpened rare earth doped tungsten needle. And one of the most important applications of tungsten needle is - electrode. The pure tungsten electrode has a high melting point, strong electron emission capability, high elastic modulus, and ablation resistance, so that it can be used in tungsten arc welding, and it plays an important role in arc starting, arc stability and welding quality.
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Rare earth doped tungsten electrode can improve the welding performance of pure tungsten electrode and stimulate its electronic work ding, so that it has better arc starting performance, higher arc column stability, and smaller electrode burning rate. The sharpened needle is suitable for DCSP. Wherein, the tungsten needle electrode is connected to the negative electrode of the power supply output, and the weldment is connected to the positive electrode of the power supply. Moreover, the tip angle of tungsten needle will vary with application type, welding current and electrode diameter.
