Welding defects causes and remedies pdf nptel

 

 

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Causes: · undercut. Too high weld current. · Too fast weld speed. · The use of an incorrect angle, which will direct more heat to free edges. · The electrode is too heat treatment and inspection methodologies for welding defects will also be produced during solidification of welds can cause cracks if the weld isCauses of Incomplete penetration: · Improper joints. · Too large root face, root gape, and bevel gear. · Wrong hold position of the electrode. · Too large electrode Weld Defects-Their Causes and How to Correct Them With the correct welding conditions, techniques and material quality standards, the mig process will yield Reason Of Weld Crack · Residual stress during cooling · Foreign metal contamination · Use of hydrogen when welding ferrous alloys · High welding speed with low

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