Roll scratch - 1.7139

 

A roll scratch is a straight deepening which is going in lengthways direction to the wire rod. The form of a roll scratch can be broad with low depth or also pointed with a greater depth. The defect arises if the rolling piece drags at leaderships or at other rolling accessories. Roll scratches, which are available at the pre-material (billet), can lead to a pincher when rolling further to the ready profile. The defect on hand is a roll scratch which has arisen during rolling to the round profile.

Rod wire 24,00 mm round - spheroidised

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