Bingji (Benjamin) Li, Ph.D.
Metal Pass LLC
John Nauman, Ph.D.
Metal Pass LLC
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
- Level 2 System
- Rolling mill Level 2 model
- Reheating furnace Level 2 model
- Controlled cooling Level 2 model