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Level 2
Model
Optimization and New Product Development
Benjamin Li,
Metal Data LLC
www.meta4-0.com (Industry 4.0 Metaverse)
<Continue>
2. Micro-Alloy and Model Modification（1）
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(1) Micro-Alloy and Model Modification |
Addition of micro-alloying elements Nb, V, Ti, Cr,
Mo, and Cu usually in today’s steel making practice, increases recrystallization
temperature by 50-100°C. This is diffent from conventional steels which were
mainly carbon steels. Moreover, the higher reduction and lower forming
temperature incurred in today’s rolling practice more likely create residual
strain, thus the work-hardening is much higher than conventional rolling.
Softening occurs due to recovery and recrystallization during holding stage. Due
to the limited precision and large amount of calculation of metallurgic
simulation, it is necessary to make some off-line design for metallurgic
process. Some hard-and-thin grades even enter the two-phase region due to too
fast temperature drop, resulting in the failure in the conventional Level 2
model.
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(2) Machine Learning logic errors |
Conventional Level 2 System is a large system, and
the personnel in material science cannot develop it. It is usually developed by
the personnel in automation. Therefore, the developers are not very proficient
in the basic logic of material science, resulting in the logic defects in
material performance in the Machine Learning.
Therefore, we have developed a machine learning method to solve such problems.
In fact, Japanese scholars have suggested a unique machine learning method to
solve this problem, and claimed that it is very accurate. And we use more than
one set, but tens of thousands of sets, which is far more accurate than that of
Japanese counterparts!
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(3) Abandoning the Level 2 after 5-10 years of use |
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After multiple years of use, the model is no longer suitable for the production
line due to the changes of production process, equipment, products type and
automation mode (unless the factory has a strong person to track the change and
make corresponding modification). Because the model part of the large-scale
system (i.e. Level 2 System) accounts for only about 1 ‰ of the total investment
of the production line, many enterprises abandon the model and reinstall a new
one, usually aafter the system is used for 5-10 years. Our team has developed a
set of continuous upgrading scheme, which can avoid the problem of Level 2
System abandonment and reinstallation every 5 to 10 years. This alone can save
millions of dollars for enterprises every 5-10 years! |
<To Be Continued>
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