Roughing Mill Induced Lamination in the Hot Mill

Major surface rejections at the hot-dip galvanizing line at Cleveland Cliffs Cleveland Works LLC was discovered. Defect sample analysis revealed the defect was formed during the early roughing mill reductions in the hot mill. This paper describes the activities taken to determine the root cause of the defect as well as countermeasures to alleviate this defect. Sample analysis showed short laminations being induced and subsequently rolled over onto the strip surface during the roughing mill processing. Corrective actions were implemented to resolve the issue.

Authors:

Mohammad Assar | Cleveland-Cliffs Cleveland Works LLC
 

Mr. Michael Zellhart | Cleveland-Cliffs Cleveland Works LLC
 

Session Chairs:

Matt Druciak | TENOVA Inc.
 

Julia Allard | Hatch