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October
2005 |
State
of the Art of Rail Rolling
Ulrich Svejkovsky (pictured),
vice president — Section and Billet Mill Div., SMS Meer
GmbH, Moenchengladbach, Germany (ulrich.svejkovsky@sms-meer.com),
and Roy E. Perala, manager — rolling and finishing,
Steel Dynamics Inc., Columbia City, Ind.
Recent rail mill modernizations and expansions have led to
rail products with improved tolerance, straightness, residual
stress and mechanical properties. This article details the
latest in rolling and cooling methods.
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Planning,
Implementation and Commissioning of a 3-roll Reducing and
Sizing Block at Nucor Norfolk Division
Doyle Hopper (left),
maintenance/engineering manager, Greg Moen, electrical supervisor,
Nucor Steel–Nebraska, Norfolk, Neb.; W.-Jürgen
Ammerling (center), managing director — sales and marketing,
Friedrich Kocks GmbH & Co. KG, Germany; and Sergio A Filippini
(right), president, Kocks Pittsburgh Co., Pittsburgh, Pa.
(dhopper@nucorne.com, gmoen@nucorne.com, ammerling@ kocks.de
and sfilippini@kockspittsburgh.com)
To satisfy a more rigorous market, Nucor Steel–Nebraska
analyzed different modernization possibilities for their wire
rod and bar mill. The
expansion project is detailed in this article, along with
its impact on quality, productivity, mill flexibility and
operating costs.
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On-line
Monitoring of Wall Thickness and Austenite Grain Size on a
Seamless Tubing Production Line at The Timken Co.
Silvio Kruger (top left), Guy Lamouche
(top center) and Jean-Pierre Monchalin (top right), research
officers, Industrial Material Institute, National Research
Council of Canada, Boucherville, Que., Canada (silvio.kruger@cnrc-nrc.gc.ca,
guy.lamouche@nrc.ca, jean-pierre.monchalin@cnrc-nrc.gc.ca);
Robert Kolark II (bottom left), program manager, The Timken
Co., Canton, Ohio; Gerald Jeskey (bottom center), president,
Jeskey Consulting, Uniontown, Ohio; and Marc Choquet (bottom
right), vice president for laser ultrasonics, Tecnar Ltée,
St. Bruno, Que., Canada
Laser-ultrasonic
applications provide outstanding examples of how advanced
sensors can help the steel industry in its challenge to improve
quality and increase productivity.
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Numerical
Modeling of Rolling Process Using Longitudinal Slitting Passes
Sebastian Mróz
(left), assistant professor, Piotr Szota (center), assistant
professor, and Henryk Dyja (right), professor, Institute of
Modeling and Automation of Plastic Working Processes, Czestochowa
University of Technology, Czestochowa, Poland (mroz@mim.pcz.czest.pl)
The Forge3® program was employed to analyze the process
of rolling with strip slitting. Based on the results of computer
simulations, it is possible to choose proper technological
parameters for both the
preslitting and slitting passes. |
ABB
Interstand Dimension Control: IDC Improved Tolerances in Profile
Mills
Mats G. Olsson, ABB
Automation Technologies AB, Metals and Mining, Vasteras, Sweden
(mats.g.olsson@se.abb.com)
An IDC system provides immediate measurements of height, width
and position of long round products out of a roll gap. As
a result, a more consistent mill setup and improved pass schedules
can be achieved, as well as improved product tolerances.
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The Effect of Boron on Low-carbon Rods and Galvanized
Wires
Andrew Wallace (left),
Allan Brownrigg (second from left), Peter Hodgson (second
from right), professor of engineering, Deakin University,
Geelong, Vic., Australia (awallace@ryco.com.au, allanb@vicnet.net.au,
phodgson@deakin.edu.au); and Leo Frawley (right), technical
manager — Laverton Steel Mill, Smorgon Steel Reinforcing
and Steel Products, Laverton, Vic., Australia (lfrawley@smorgansteel.com.au)
One
of the major factors influencing the mechanical properties
of EAF steels is the high level of residual nitrogen in the
finished product. This article examines the effect of adding
boron to low-carbon steels that are used for high formability
galvanized wire applications.
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