Tungsten inert gas cored wire
Tungsten inert gas filler wire is used in TIG welding to continuously feed the material and increase welding performance. It ensures homogeneous alloying and improves the mechanical properties of the weld.
Physical-Chemical Mechanism of Action
The tungsten inert gas filler wire is fed continuously during the welding process. It provides a constant supply of tungsten, which mixes with the metal in the heat and refines the surface. This improves the corrosion resistance and mechanical properties of the weld.
Metallurgical Relevance & Welding Risks
Using the filler wire increases the strength and toughness of the weld. However, insufficient or too little tungsten can lead to inadequate alloying, compromising corrosion resistance. Excessive use can cause too high a tungsten content in the weld, increasing hardness and reducing toughness.
Workshop Practice & Handling Instructions
Use the filler wire in TIG welding for metals like steel or nickel. The correct tungsten dose is typically 0.5 to 1 % of the total content. Ensure the filler wire is fed continuously and evenly. Feeding too fast or too slow can result in uneven alloying.