Reduce the gap between the weld joints by using reasonable weld joints. 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. HMG2012 Discontinuity An interruption of the typical structure of a material such as a lack of homogeneity in its mechanical metallurgical or physical characteristics. Welding cracks can be present at the surface inside of the weld material or at the heat affected zones. With root pass welding quickly move the arc from the weld pool to the. Any unacceptable deviation with respect to set technical and design requirements in the welding process is. Defects are usually caused by incorrect welding parameters such as too low of a welding current insufficient preheat too fast of a welding speed incorrect joint preparation short arc length or insufficient electrode size. A weld discontinuity in which fusion did not occur between weld metal and jo int fusion face or between adjoining weld beads.Ĭontrols the weld profile and reduces the liability of sorrow of fusion defects and the. WELDING DEFECTS THEIR CAUSES AND REMEDIES. Crater cracks Causes The welding ended far too abruptly.
#Welding defects causes and remedies pdf pdf#
Types of welding defects Internal Welding Defects Weld Cracks Inclusions Blowholes Insufficient Fusion External Welding Defects Crater Undercut Spatter Distortion Hot Tearing Surface Cracks Internal Welding Defects This types of welding defects are hard to visualise by open eyes and you need to look into the microscopic structure to discover defects.ġ5 Most Common Welding Defects Causes And Remedies With Pdf What Is Piping A defect is a rejectable discontinuity. Welding Defects- Types their causes and remedies.
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