In TIG welding, correctly adjusting the welder current to match the specifications and uses of the tungsten electrode is a critical step in ensuring that the arc is stable, the weld quality is good, and the electrode is not burned out. When adjusting the current, it is necessary to consider the electrode diameter, welding current type, welding material and workpiece thickness.
First, the current range should be preliminarily set according to the diameter of the tungsten electrode. Generally speaking, the thicker the electrode, the greater the current it carries. Here is a common reference:
1.0 mm tungsten electrode: suitable for 5~70A
1.6 mm tungsten electrode: suitable for 20~150A
2.4 mm Tungsten Electrode: Suitable for 80~200A
3.2 mm tungsten electrode: suitable for 150~250A
4.0 mm tungsten electrode: suitable for 200~320A
Second, it should be further fine-tuned according to the type of current used in the welding. For DC welding (DCEN, electrode to negative electrode), a higher current can be used, suitable for stainless steel, carbon steel and other materials; AC welding (AC) is used for materials such as aluminum and magnesium, as the electrode will experience spheroidization or arc instability, and the current is usually set slightly lower to avoid excessive melting or burning of the electrode terminal.
Also, consider the thickness of the workpiece. When welding thin plates, a lower current should be used to avoid burn-through; When welding thick parts, the current should be appropriately increased to ensure sufficient penetration depth.
Finally, it is also necessary to comprehensively adjust the welding position (flat welding, uphead welding, vertical welding, etc.) and gas flow rate to ensure that the arc shape is good and the weld is stable.
More details of tungsten electrodes, please visit website: http://tungsten.com.cn/tungsten-electrodes.html
Please contact CHINATUNGSTEN for inquiry and order of tungsten needles:
Email: sales@chinatungsten.com
Tel.: +86 592 5129595
