Overlap
The extra metal that extends around the bead is called overlap. The base metals are not adequately combined with the dispersed filler metal. It usually has a rounded form over the weld joint.
Causes of Overlap
- Wrong selection of metal.
- Incorrect welding procedure.
- Improper arrangement of base metal.
Preventions of Overlap
- The Smaller welding current.
- Use of proper welding techniques.
- Shorter welding electrode.
Defects in Welding
A perfect weld is essentially unachievable in practice, and most of the time it is not necessary to give the requisite level of service functions. As a result, in order to define what is appropriate and suitable for use, numerous industries have set standards and tolerances for welds. These allow for different kinds, sizes, and frequencies of flaws and are described as codes or standards.
The identical weld may be permitted under one code but not under another because some rules are more stringent than others. Weld surface irregularities, discontinuities, flaws, or inconsistencies that appear in welded objects are referred to as welding defects. Weld joint flaws may cause assemblies and parts to be rejected, expensive repairs to be made, a major decrease in performance under working conditions, and, in the worst situations, catastrophic breakdowns that cause property and human casualties.
These flaws have multiple root causes. The majority of the time, poor weld design, inappropriate welding techniques, and the use of incompatible materials lead to flaws. These flaws can also be caused by inadequate welder training, shoddy workmanship, and a lack of process expertise. Furthermore, because of the inherent weaknesses in welding technology and the properties of metals, there are always certain faults in the welding.
Table of Content
- Welding Defects
- External Welding Defects
- Internal Welding Defects
- How to Detect Welding Defects
- Conclusion
- FAQs
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