ArcelorMittal Atlantique has developed the DWI Ultra
Low Aluminium grades to improve the rejection rates
during the deep drawing of beverage cans. At the time of
industrialization of this grade, an increase of slivers defects
was recorded. The analysis of these slivers permitted to
trace down their origin to the continuous casting powder.
The compared analysis of slags during casting, respectively
on standard DWI and ULA DWI, pointed out infiltration
phenomena and inclusion pick-up. A high viscosity powder
was formulated. An acceptable sliver rate was achieved
with a strong decrease in downstream repaired coils.