What's Spot Welding Tungsten Electrode?
1. What's Spot Welding Tungsten Electrode?
Spot welding tungsten electrode is a high-performance, non-consumable electrode material used in the resistance spot welding process. It is typically manufactured from high-purity tungsten (W≥99.9%) or tungsten-based composite material via powder metallurgy process. During welding, the electrode does not melt. Instead, it concentrates electrical energy onto the welding contact point through high current density and pressure, generating instantaneous high temperatures to achieve a metallurgical bond between metals.
Compared to traditional copper electrode, tungsten electrode features a higher melting point (approx. 3422°C), a lower coefficient of thermal expansion, and stronger resistance to high-temperature softening. Consequently, it is better suited for high-precision, high-frequency, and micro-spot welding applications.
2. Working Principle of CTIA's Spot Welding Tungsten Electrode
In the resistance spot welding process, spot welding tungsten electrode serves as a conductive and pressurizing tool. As the current passes through the contact interface, it generates Joule heat, causing the local metal to heat up rapidly, melt, and form a weld nugget. Thanks to its high melting point and exceptional stability, tungsten electrode maintains a stable tip morphology under high current density, enabling precise connection with low spatter and high consistency.
3. Features of CTIA's Spot Welding Tungsten Electrode
CTIA’s spot welding tungsten electrode has the following characteristics: (1) strong high-temperature stability with low risk of softening or deformation;(2) high current carrying capacity with excellent energy concentration;(3) strong resistance to arc erosion and low wear rate;(4) stable tip geometry with extended service life. In microelectronics and precision joining, tungsten electrodes effectively reduce spatter and sticking while improving weld spot consistency.
4. Material Systems of CTIA's Spot Welding Tungsten Electrode
The common material systems for CTIA's spot welding tungsten electrode are detailed in the picture below:
5. Applications of CTIA's Spot Welding Tungsten Electrode
CTIA's spot welding tungsten electrode is widely used in high-precision manufacturing industries, including: (1) lithium battery tab and nickel sheet spot welding;(2) wire harness terminals and micro-connector welding;(3) PCB electronic component precision packaging;(4) motor winding lead welding;(5) medical electronics and sensor encapsulation.Tungsten electrodes provide high value in automated production lines requiring high consistency.
6. Specifications of CTIA's Spot Welding Tungsten Electrode
Material: Pure tungsten (W ≥ 99.9%), tungsten copper (W-Cu), tungsten molybdenum (W-Mo)
Diameter: 0.5–10.0 mm, customizable
Length: 20–150 mm, customizable
Tip shape: spherical, flat, conical, customizable
Backed by over 30 years of tungsten electrode manufacturing experience, CTIA provides customization and optimization based on specific spot welding conditions. An integrated full-process capability covers powder preparation, forming and sintering, precision machining, and inspection. Grain structure and microstructure uniformity are optimized to improve electrical conductivity stability and thermal shock resistance, ensuring stable service life and consistent performance under high current density and high-frequency spot welding conditions, meeting stringent requirements of precision welding equipment.
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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