SOM-Based Analysis to Relate Non-uniformities in Magnetic Measurements to Hot Strip Mill Process Conditions

The paper describes the application of a Self-Organising Map for the analysis and the interpretation of measurements taken by a Non-Destructive Testing system named IMPOC\({}^\circledR \) and related to the hardness of steel coils after the hot rolling mill. This work addresses the problem of understanding whether distinct process conditions may lead to non-uniform mechanical properties along the coil. The proposed approach allows to point out, for each specific steel grade, some process conditions that are more frequently associated to disuniformities.