Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New intensive-cooling unit allows production of high-strength steels in a wide range of thicknesses

11.11.2010
World´s first application of new cooling technology from Siemens at ThyssenKrupp hot-strip rolling mill

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.

Dr. Rainer Schulze | Siemens Industry
Further information:
http://www.siemens.com/industry-solutions
http://www.siemens.com/metals

More articles from Machine Engineering:

nachricht Enhanced ball screw drive with increased lifetime through novel double nut design
23.01.2018 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH

nachricht Scientists from Hannover develop a novel lightweight production process
27.09.2017 | IPH - Institut für Integrierte Produktion Hannover gGmbH

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Contacting the molecular world through graphene nanoribbons

19.02.2018 | Materials Sciences

When Proteins Shake Hands

19.02.2018 | Materials Sciences

Cells communicate in a dynamic code

19.02.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>