Quality assessment of rolled strip produced by compact versus conventional rolling

Abstract EN

In continuous casting and rolling, the major factors that influence the quality are frequently interrelated and dependent on each other, with complex confluent relationships.

When one of these factors changes, e.g.

the temperature, not only is the rolling force affected, but the torque and surface properties, as kinematic boundary conditions, change as well.

The same is valid for the geometric quality parameters, consisting of thickness, profile, flatness, width, and wedge, as well as for surface roughness.

In order to be able to predict and improve the expected quality of the rolled sheet, a detailed analysis of all these factors is necessary.

The steel quality-producing ability of the new compact strip production technique as compared to an integrated mill is studied by using modern data mining tools, primarily the Self-Organizing Map (SOM) approach.

The data are gathered at several steel mills.

In this paper, data from two mills is analyzed using a bench marking approach.