Earing

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Earring is an effect in metal processing . After recrystallization, rolled copper sheet has a specific orientation of the face-centered cubic crystal lattice . As a result, it has a higher resistance to deformation in the rolling direction than at an angle of 45 °. When deep drawing a sheet z. B. therefore remain in the rolling direction and at right angles to the so-called lugs. Compression is easier under 45 °, these zones are drawn in. The formation of lobes can be prevented by a special rolling and annealing program, in the case of sheet steel also by normalizing .