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Materials Science & Technology 2008
(MS&T'08)

 

Significance and Development of a Next-Generation Level 2 Model as a Metallurgical System
(Presentation Slides)

Bingji (Benjamin) Li, Ph.D.
Metal Pass LLC
www.metalpass.com
bli@metalpass.com
www.bli1.com

John Nauman, Ph.D.
Metal Pass LLC
www.metalpass.com
jnauman@metalpass.com
www.metalpass.com/jnauman


 

ABSTRACT

Level 2 model improvement projects have revealed various metallurgical issues that negatively affect the current Level 2 model. The considerable retained strains due to uncompleted recrystallization, and the metallurgical phenomena during hold and two-phase region rolling, etc., cause significant model errors which cannot be removed by adaptive learning. Wide application of metallurgical processes in today’s steel rolling calls for a Level 2 model to fully consider metallurgical principles. The next-generation Level 2 model should include a hybrid system by combining a full-range of metallurgical models with intelligent learning such as neural network, together with an expert system to guide the learning. The new model would also improve the pass schedule in controlled rolling principle and provide assistance for the Level 3 scheduling. The revealed metallurgical issues, the general concepts of the next-generation Level 2 system and the related metallurgical models, etc., will be introduced.

  • Level 2 model as a metallurgical system
    • Incomplete recrystallization and retained strain
    • Softening during the hold
    • Two-phase region
    • Metallurgical nature of the flow stress
    • Property variations
  • Benefits of metallurgical Level 2
    • High Accuracy of the Force Prediction
    • Improved pass schedule and slab selection
  • Development of Next-Generation Level 2 Model as a Metallurgical System
    • Level 2 System
    • Rolling mill Level 2 model
    • Reheating furnace Level 2 model
    • Controlled cooling Level 2 model


 

SUMMARY



 


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