Tungsten Electrode in Spot Welding
Spot welding tungsten electrode refers to a special electrode used in Resistance Spot Welding (RSW) processes, primarily for joining highly conductive and high thermal conductivity metals such as copper, aluminum, nickel, and silver. Unlike conventional steel sheet spot welding, which commonly uses copper chromium zirconium electrodes, tungsten electrodes offer a higher melting point, greater hardness, and excellent anti-sticking properties, making them particularly suitable for welding highly conductive materials and precision components. During the welding process, the tungsten electrode transfers current and pressure while maintaining a stable electrode shape, ensuring weld quality and consistency.
1. Working Principle of Tungsten Electrode in Spot Welding
Spot welding follows the principle of resistance heating. After the upper and lower tungsten electrodes clamp the workpieces together, a high current passes through the contact area, generating Joule heat (Q=I²Rt) and rapidly melting the localized metal to form a weld nugget. After the current is switched off, the nugget solidifies under pressure to create the weld joint. Tungsten has a melting point of up to 3422°C, allowing it to maintain dimensional stability at elevated temperatures while quickly dissipating excess heat. This concentrates heat within the workpiece contact area rather than the electrode itself, improving welding stability and electrode service life.
2. Types of CTIA’s Spot Welding Tungsten Electrodes
The types, advantages, and applications of CTIA’s spot welding tungsten electrodes are shown in picture below:
3. Applications of CTIA’s Spot Welding Tungsten Electrodes
CTIA’s spot welding tungsten electrodes are used in: (1) copper and copper alloy joining; (2) aluminum and aluminum alloy spot welding; (3) battery tab welding; (4) electronic lead wire connections; (5) relay contact welding; (6) precision welding of medical devices; and (7) micro-resistance welding and parallel gap welding.
4. Specifications of CTIA’s Spot Welding Tungsten Electrodes
(1) Electrode Materials: Pure Tungsten (W), Tungsten Copper (WCu), Copper Embedded Tungsten (Cu-W)
(2) Diameter: 0.5–10.0 mm, customizable
(3) Length: 50–300 mm, customizable
(4) Tip Geometries: Pointed, spherical, flat, conical, and custom-shaped designs
(5) Note: CTIA provides customized spot welding tungsten electrode solutions according to specific application requirements.
CTIA GROUP (CTIA) has over 30 years of experience in tungsten electrode manufacturing, backed by integrated capabilities in tungsten powder processing, powder metallurgy, high-temperature sintering, and precision machining. CTIA’s spot welding tungsten electrodes are available in pure tungsten, tungsten copper, and copper-embedded tungsten grades, with customized dimensions, tip geometries, and mounting configurations to support new energy batteries, electronics manufacturing, electrical connections, and precision welding applications.
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
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