Scab on the surface - 1.7034

 

Sticked flaky things, which are in places on the surface, are described as scab. They usually only have connection to the basic material in a place. Scabs can appear as a pre-material defect of the billet or block or they can arise from local pincher at the hot forming. In most cases a metallographic specimen examination can give information about the origin of the scabs. In this case it is defects of the pre-material. At the microsections the material of the scab was identified as another material.

Rod wire 13,00 mm round - spheroidised

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