The wire material was drawn to bars. A teared film of lubricant
in places has presumably led to a changed flow behavior at the surface. At the
routine control by means of tensile test places with bursts have noticed at the
surface. The bursts were arranged in a line on the surface. The microsections showed
a stronger microstructural deformation in the areas concerned. The defect-free
surface didn't show this microstructural changes.
20,50 mm round - spheroidised