As a high-quality welding method, argon arc welding has strict requirements for electrode materials. Tungsten electrodes are widely used mainly due to their unique physical and chemical properties, which can meet the stringent conditions of argon arc welding for stable arcing, high temperature tolerance, and current conduction.
Firstly, tungsten has an extremely high melting point of about 3410 degrees Celsius, which is the highest of all metals. This characteristic allows the tungsten electrode to maintain the stability and integrity of the structure even in the face of high-temperature arcing during the welding process, and is not easy to melt and consume, thereby ensuring the life and stability of the electrode during the welding process.
Secondly, tungsten has good conductivity and can efficiently conduct welding current, ensuring that the current passes smoothly through the electrode and forms a stable arc. A stable arc not only provides uniform heat input but also reduces arc wobble and welding defects, improving weld quality.
In addition, the heat resistance and oxidation resistance of tungsten electrodes are also excellent. Under the protection of inert gas, the tungsten electrode can resist high-temperature environments and arc ablation, avoid rapid damage or deformation of the electrode part, and maintain the continuity and consistency of the arc.
Finally, the chemical stability of the tungsten electrode makes it difficult to react with the molten pool metal, avoiding the generation of impurities in the weld and ensuring the metal purity of the weld area. This is especially important in precision manufacturing and in areas where welding quality is extremely demanding.
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