Excessive weld reinforcement
Uneven weld reinforcement is an uneven deposit of weld metal on the weld surface, causing notches and extra weight.
Physical-Chemical Mechanism of Action
Uneven weld reinforcement occurs due to uneven melting or hardening of the weld metal. This can happen due to varying material properties, uneven stresses, or inadequate cooling.
Metallurgical Relevance & Welding Risks
Uneven weld reinforcement leads to notch effects that deform the material and impair its mechanical properties. This can cause cracks, wear, and reduced service life of components. It also increases the weight of the weld, which is undesirable especially in flowing applications.
Workshop Practice & Action Instructions
To avoid uneven weld reinforcement, ensure even cooling of the weld metal. Use suitable coolants and make sure the weld cools in a protected environment. For heavy materials or high stresses, it can help to preheat or normalize the workpiece before welding.