Siemens VAI Metals Technologies will install a new intensive-cooling unit in the Hot-Strip Mill 2 of ThyssenKrupp Steel AG in Duisburg-Beeckerwerth, Germany. The “Power Cooling” process will enable high- and highest-strength steels to be reliably cooled for a wide range of strip thicknesses. This will enable additional steel types to be efficiently produced with a high degree of precision. The intensive cooling unit is scheduled to commence operation in December 2010.
Example of a Siemens VAI cooling unit in a hot-strip rolling mill
The intensity of cooling and volume flow in the cooling section must be carefully regulated so that the desired microstructure of the rolled material is achieved with high precision. Contrary to laminar-flow strip-cooling processes, “Power Cooling” technology developed by Siemens VAI allows cooling rates as high as 400 K/s. In particular, the production of high- and highest-strength steels in the upper thickness range of up to one inch requires high cooling rates. Another special feature of the cooling section is the wide range within which the flow volume can be regulated. This enables the strip-cooling process to be precisely and flexibly controlled.
“Power Cooling” can achieve heat flow densities of up to 5 MW/m2 – three times higher than the rates achieved with laminar-flow cooling processes. The new cooling system also allows lower flow volumes to be set for a quasi-laminar cooling condition.
A newly developed cross-plant temperature model will also be utilized for the operation of this plant. This model applies a uniform calculation method for the entire finishing mill, through the cooling section and to the coiler. This enables a highly accurate prediction of the start of the phase transition, even if it takes place in the finishing mill. Furthermore, the calculation of the bainitic portions of the structure is also integrated within the model.
The cross-plant temperature model replaces the existing Siemens laminar-flow strip-cooling temperature model, which has been used in the Beeckerwerth Hot-Strip Mill 2 since 2007. It helps the phase transitions to be controlled even more precisely during the cooling of hot-rolled steel strip, thereby increases the flexibility of the rolling mill. Different types of steel can be produced in any sequence, and new types of steel can be added to the production without having to change the software or model parameters.
ThyssenKrupp Steel Europe AG is the leading company for the European carbon-steel activities of the ThyssenKrupp Group, one of the world's largest producers of quality flat-steel. The Hot Strip Mill 2 in Duisburg-Beeckerwerth rolls six million tons of steel per annum, which is one of the highest mill outputs in the world. A rolling modernization program enables ThyssenKrupp Steel Europe to produce a numerous types of modern, high-quality steels for use in the automotive industry and for pipe production.
Further information about solutions for steel works, rolling mills and processing lines can be found at: http://www.siemens.com/metals
The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility und Osram. With around 207,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2009 total sales of approximately €35 billion. http://www.siemens.com/industry
The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around 31,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.8 billion in fiscal year 2009.
Scientists from Hannover develop a novel lightweight production process
27.09.2017 | IPH - Institut für Integrierte Produktion Hannover gGmbH
PRESTO – Highly Dynamic Powerhouses
15.05.2017 | JULABO GmbH
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
11.12.2017 | Physics and Astronomy
11.12.2017 | Earth Sciences
11.12.2017 | Information Technology