What does the term "weld bead" refer to in welding?

The term "weld bead" specifically refers to the final deposit of molten filler metal that solidifies in a weld joint. This bead is the visible raised line that results from the welding process, consisting of the filler metal that has been fused to the base materials. A well-formed weld bead is crucial for ensuring the strength and integrity of the welded joint, as it should be smooth, uniform, and properly shaped to guarantee optimal performance.

In contrast, the overall welding process encompasses the entire series of actions involved in creating a weld, which is a much broader concept than just the appearance of the weld bead. Tools used for welding refer to the equipment and machinery that facilitate the welding operation, such as welding machines, torches, and electrodes, but do not specifically define the weld bead itself. The heat-affected zone refers to the areas of the base material that have had their properties altered due to the heat generated during welding, which is another critical aspect but not the definition of a weld bead. Understanding what a weld bead is and its characteristics is essential for evaluating the quality and effectiveness of a weld joint.