Pincher - 1.4016 steel - Cold drawing defects

Pincher - 1.4016 steel - Cold drawing defects

Figure 1: Treatment: Soft annealed. Magnification: 6.5x. Sampling/Specification: Wire surface. Testing result: Longitudinal defects on the surface.

Figure 1: Treatment: Soft annealed. Magnification: 10x. Sampling/Specification: Wire surface. Testing result: Longitudinal defects on the surface.

Defect name: Pincher
Record No.: 435
Type of defect (Internal/Surface): Surface
Defect classification: Cold drawing defects
Steel name: 1.4016 steel
Steel composition in weight %: No data.
Note: Pinchers are defects which occurs during rolling the billet or block to the wire or steel bar. Rolling fins, which were pressed in again during the subsequently rolling process, are a cause for example. Strong grooves at the semi finished products (billet) also can lead to pinchers, if they are pressed together during rolling to the profile. The defect can occur locally or about the complete rod wire length. Looked about the extent, the defect can be existing on one side or also transposed by 180°.
Rod wire 6.00 mm round - annealed, pickled.
Reference: Not shown in this demonstration version.