Roll having a hard envelope surface

摘要

To increase abrasion resistance, a cast-iron roll is given a carbidic running-surface layer which has a defined depth of at least 1 mm and a fine-grained structure whose cementite dendrites have a length of at most 100 mu m and a thickness of at most 20 mu m. The fine-grained structure is produced by remelt hardening of the outer surface of the roll.