Herringbone Defect Condition in Rolled Steel

D

dbulak

#1
Does anyone know where I can go to get information on the defect known as "herringbone' in rolled steel? I have been searchong and nothing shows up. Any help would be appreciated.
 
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U

Umang Vidyarthi

#3
Does anyone know where I can go to get information on the defect known as "herringbone' in rolled steel? I have been searchong and nothing shows up. Any help would be appreciated.
Stijloor has provided an excellent link. Let me expand on it:

Herring is specie of fish of Clupeidae family. 'Herringbone' means anything like the spine of a herring, characterized by arrangement of rows of parallel lines, which in alternate rows slope in opposite direction. The 'Herringbone Gear' (90 deg. herringbone) is a good example.

When the defects formed during rolling process of steel are in a zig-zag shape, they are known as 'Herringbone defects'.

Umang :D
 

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D

DrM2u

#4
Search for defects in sheet metal forming (rolling & drawing/stamping). You might also want to look up the defects caused by strain in sheet metal (formability). 'Herringbone' is a defect from the 'necking' family and is caused by high strains, usually larger in one direction. This causes plastic deformation and the effect of wrinkles in material. The cause depends on the process where the defect takes place. In rolling it is usually caused by uneven or worn rollers, uneven material thickness and/or lubrication. In stamping you have to look at material flow in the die. Pinch points, reliefs and lubrication play a major role. A circle analysis might help but a thorough formability analysis (i.e. Argus by GOM) will pinpoint you toward the cause and identify other problematic areas.

Disclosure: I am not afiliated with any of the organizations or products mentioned, other that maybe previous hands-on experience.
 
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