#Welding defects causes and remedies pdf crack

Use proper speed during welding Adjust the angle if required Remove slag from the previous weld. Improper cleaning Too high welding speed Incorrect welding angle Too low welding current Slug is basically solidified flux after the weld cools These are foreign material which does get trapped inside the weld or on the top of weld thus weakening the structure. Inclusions Inclusions or slag inclusion us a serious defect in welding. Consider shrinkage of weld metal before welding Preheat the metal as required. Use proper welding speed Remove foreign material from metals Check metal compatibility before welding. Residual stress during cooling Foreign metal contamination Use of hydrogen when welding ferrous alloys High welding speed with low current Poor weld joint design

#Welding defects causes and remedies pdf crack

A good welder should always consider the amount of shrinkage metals might have or else crack will form. Weld cracks are formed due to the excessive stress formed by metal because if temperature different and insufficient cooling. Cracks can be internal as well as external. Weld cracks are serious defects in welding and by any means, it is not accepted. Weld cracks Inclusions Blowholes Insufficient fusion There are numerous internal welding defects as shown below. This types of welding defects are hard to visualise by open eyes and you need to look into the microscopic structure to discover defects. Types of welding defects Internal Welding Defects Weld Cracks Inclusions Blowholes Insufficient Fusion External Welding Defects Crater Undercut Spatter Distortion Hot Tearing Surface Cracks Welding Defects : Causes, Types And Remediesĭifferent types of welding defects, welding defects causes and remedies.