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Which of the following defect occurs because of the bending of rolls?(a) Zipper cracks(b) Folds(c) Laminations(d) AlligatoringI got this question in an international level competition.Origin of the question is Defects in Rolled Parts topic in portion Forming Process of Casting-Forming-Welding II

Answer»

The correct answer is (a) Zipper cracks

For explanation: Wavy EDGES and zipper cracks can OCCUR as defects in the material, if the rolls are bended, but not, FOLDS or laminations or alligatoring. Their causes of OCCURRENCE are DIFFERENT.



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