Tungsten Electrode in Plasma Arc Welding
Tungsten electrode is a non-consumable electrode used in Plasma Arc Welding (PAW), providing continuous electron emission and a stable arc column for high-quality welding of stainless steel, titanium alloys, nickel-based alloys, and other materials. Due to the high energy density and concentrated arc characteristics of plasma arc welding, higher requirements are placed on burn resistance, electron emission performance, and dimensional accuracy than those for conventional TIG welding electrodes.
1. Working Principle of Tungsten Electrodes in Plasma Arc Welding
Tungsten electrode is installed inside the welding torch, serving as a cathode connected to a Direct Current (DC) power source. Upon electrification, tungsten electrode emits a large volume of electrons, forming an electron flow. When this electron flow passes through the constriction nozzle inside the welding torch, it interacts strongly with the plasma gas (such as argon) flowing through the nozzle, ionizing the gas medium to establish a high-temperature, high-energy-density plasma arc. This process elevates the arc temperature up to 10000–30000°C, which is sufficient to achieve deep penetration and stable welding.
2. Types and Characteristics of CTIA’s Tungsten Electrode
(1) Lanthanated Tungsten Electrode
Features a stable arc, high current-carrying capacity, and zero radioactivity, serving as one of the widely used electrode materials in current plasma arc welding applications.
(2) Ceriated Tungsten Electrode
Offers excellent arc ignition performance, suitable for low-current and precision welding conditions.
(3) Thoriated Tungsten Electrode
Provides strong electron emission capability, suitable for medium-to-high current continuous welding.
(4) Composite Rare-Earth Tungsten Electrode
Combines excellent arc initiation performance, ablation resistance, and service life, suitable for automated welding equipment.
3. Applications of CTIA’s Tungsten Electrode in Plasma Arc Welding
CTIA’s tungsten electrode is suitable for the following PAW fields: (1) automated welding of stainless steel thin sheet and pipeline; (2) precision welding of titanium alloy structural component; (3) nickel-based superalloy welding; (4) aerospace part welding manufacturing; (5) nuclear power equipment and pressure vessel welding; (6) medical device and precision instrument welding.
4. Specifications of CTIA’s Tungsten Electrode in Plasma Arc Welding
Specifications of CTIA’s tungsten electrode in plasma arc welding are shown in the picture below:
Backed by over 30 years of tungsten electrode manufacturing experience, CTIA GROUP stably supplies pure tungsten electrode, ceriated tungsten electrode, lanthanated tungsten electrode, thoriated tungsten electrode, and composite rare earth tungsten electrode, while supporting customization of diameter, length, tip morphology, and performance parameter to fulfill diverse demands of PAW in high-quality welding, automated production, and precision manufacturing fields.
For any inquiry, please contact tungsten electrode manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
WeChat:
More info>>