A mechanism for generating aluminum debris in the roll bite and its partitioning between the surface of the work roll and the surface of the sheet as smudge©

A series of tests of cold rolling aluminum on a laboratory rolling mill showed that the amount of debris generated in the roll bile increased with an increase in the amount of reduction. II also showed at light reductions, the debris generated distributed evenly between the surface of the sheer exiling the mill as smudge and the surface of the work roll where it was washed off The rate of generating debris at light reductions also followed the Archard equation. Al higher reductions, however, it was shown that much more debris adhered to the work roll and was washed off than that which remained on the surface as smudge. The rate of generating debris also deviated from the Archard equation. To explain this deviation, ii was proposed that the mechanism for generating debris in the roll bite was due to abrasive wear at light reduction but at high reductions, the mechanism was due to adhesive wear.