Method for detecting and classifying surface defects on continuously cast slabs

US8499821B2 · kind B2 · utility

Assignee

• SMS SIEMAG AG · DE

Inventors

• Dieter Rosenthal · Niederfischbach, DE
• Stephan Schulze · Ratingen, DE
• Ingo Schuster · Willich, DE
• Peter Sudau · Hilchenbach, DE
• Rainer Fackert · Meinborn, DE
• Andreas Weinert · Essen, DE
• Wilfried Schumacher · Heiligenhaus, DE

Key dates

• Filing date: Apr 2, 2008
• Grant date: Aug 6, 2013
• Expiry date: Mar 8, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/95
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the detection and classification of surface defects on continuously cast products using topographical information about the appearance of continuously cast surface defects and/or flaws are determined with respect to their exact position, evaluated with respect to their location and dimensions, and eliminated in accordance with the evaluation prior to further machining of the product, or are prevented by optimizing the process. The defects and/or flaws on the slab surface of the continuously cast preliminary product are detected and are stored with respect to their exact position and a detection of defects and/or flaws on the finished product is carried out and stored with respect to their exact position, and in that the information from the preliminary product is then compared with the information from the surface inspection on the finished product. Only the information which has led to, or can lead to, defects on the finished product is considered for the elimination of defects and/or flaws on the preliminary product.