Composite bimetallic supporting roll for hot rolling mill

摘要

A bimetallic composite back-up cylinder for a rolling mill, in particular for a four-roll or six-roll stand of a hot strip train finisher, comprises a metal envelope made of a steel having a chromium content between 13 and 17 wt. %, and a carbon content between 0.5 and 0.8 wt. %, the chromium/carbon ratio being between 20 and 25.