What Is the Function of Welding Wire?

Welding wire plays an indispensable role in the welding process. Specifically, it includes the following points:

1. Filling the weld: The primary task of the welding wire is to serve as a source of molten metal and fill it into the gap to be welded. In this way, the originally separated metal parts can be tightly connected together through the melted welding wire metal to form a complete and solid welded structure.

2. Protecting the welding area: During the welding process, the welding wire not only provides filling material, but also helps to prevent the weldment and the molten pool from being contaminated by the external environment. This is usually achieved through the welding wire itself or the shielding gas matched with the welding wire, such as inert gas, plasma gas or active gas, which can isolate oxygen and other harmful elements in the air to ensure the purity and quality of the welding process.

3. Adjusting welding performance: The type and quality of welding wire directly affect the performance after welding. According to the engineering requirements, different types of welding wire can be selected to meet specific strength, sealing, corrosion resistance, electrical conductivity and thermal conductivity requirements. Therefore, the selection of welding wire is crucial to ensure the overall performance of the welded structure.