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WELDING & METALS ENGINEERING. 8055 Coronet Road, Edmonton Alberta, T6E 4N7. Phone: 780-469-5870 info@qualimet.ca www.qualimet.ca. This article may be reproduced provided authorship information is left intact. November 2013. Common Weld Defects – Causes and Cures. For any weld to be acceptable,
SESSION-5. WELDING DEFECTS – THEIR CAUSES AND REMEDIES. Discontinuity.. An interruption of the typical structure of a material, such as a lack of homogeneity in its mechanical, metallurgical, or physical characteristics. A discontinuity is not necessarily a defect but all defects are discontinuities. Defect.
Deformation. Causes. • Unsuitable welding sequence. Arc blow. Causes. • Longitudinal cracks in the heat affected zone. Causes. • Lack of fusion defects. Causes. • Heat input too low. Slag inclusions. Causes. • Lack of root penetration. Causes. • Crater cracks. Causes. • Undercut. Causes. • Arc voltage too high.
KEMPPI Welding Technology Course. Weld defects, their Causes &. Remedies. R.Banerjee Defects of Welding. ? Defects are those which can be theoretically eliminated, such as –. ? Cracks, Lack of Fusion, slag inclusions, porosity and undercuts. ? Only when we understand the nature of these defects and why they
Abstract. Welding defects can greatly affect weld performance and longevity. Having an understanding of the various defects, their causes and remedies can help to ensure higher-quality and longer lasting welds. Upon detection of welding defects, an evaluation should be carried out to determine its severity, and
Welding Defects. Wanda S. Benton. Florence-Darlington Technical College. UNDERCUT. POROSITY. INCOMPLETE FUSION. OVERLAP. UNDERFILL. SPATTER. EXCESSIVE CONVEXITY. EXCESSIVE CONCAVITY. EXCESSIVE WELD REINFORCEMENT. INCOMPLETE PENETRATION & EXCESSIVE PENETRATION.
Arc welding requires striking a low-voltage, high-current arc between an electrode and the base metal. The intense heat generated with this arc melts the base metal and allows the joining of two components. The characteristic of the metal that is being welded and the joint type (i.e. groove, fillet, etc.) dictates the welding
Causes and Cures of Common Welding defects. Welding Type. worm hole. Defect: Blow Hole. worm hole. blow hole. Why. What to Do. SMAW. CO2/MAG 1.Unclean base metal surface. 2.Rusted wire or wet flux. 3.Improper spot welding or wire. 4.Excessively long arc length or. insufficient gas shielding. 5.Welding in the windy
Manufacturing Process - I. Dr. D. K. Dwivedi Department of Mechanical and Industrial Engineering Indian Institute of Technology, Roorkee Module - 3. Lecture - 14. Reaction in Weld Region & Welding Defects Welcome students. You, you have seen, that in fusion welding processes for joining the metals, localized heating
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