Excessive Weld Reinforcement
Excessive weld reinforcement happens when the weld bead surface bulges up too fast, causing bad notch stresses and potential cracks.
Physicochemical Mechanism of Action
Excessive weld reinforcement occurs when the weld beads build up too quickly. This happens due to excessively high wire feed speeds or too low welding speed. This causes the weld metal to not deform uniformly, leading to notch stresses.
Metallurgical Relevance & Welding Risks
Excessive weld reinforcement can lead to high notch stresses, which can cause cracks or deformation in the workpiece. Furthermore, it can impair the toughness and strength of the weld.
Workshop Practice & Instructions
To avoid excessive weld reinforcement, the wire feed speed should be reduced and the welding speed increased. An optimal feed speed is typically 3 to 5 mm/s, while the welding speed should be between 10 and 20 m/min.