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September
2007
Vol. 4, No. 9
Long Products Technologies
About the Cover
After being welded, 1,600-foot rail strings lie on the transfer table at Steel Dynamics Inc.’s Columbia City, Ind., Structural and Rail mill, visible in the distance. The strings are made up of 240-foot rails produced at the SDI facility. The rail-welding facility — including the transfer table, welding and finishing buildings, rail-loading equipment, and the rail spurs to accommodate the rail trains — extends over one-half mile in length. Photograph courtesy of SDI.
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29
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New Welding Technology for Banding Machines at the Nucor Steel–Berkeley Beam Mill
Sean M. McCarthy, production supervisor, James Crenshaw, automation engineer, and Chris L. Andersen, maintenance supervisor, Nucor Steel–Berkeley, Huger, S.C. (mccarthys@nucorsteel.com, crenshawj@nucorsteel.com, andersenc@nucorsteel.com)
A new technology for securing product for shipment was installed at the Nucor Steel–Berkeley beam mill. This paper shows how both production and
maintenance concerns were addressed, as well as the requirements necessary to integrate the new machines into the production line.
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34
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Upgrade of the Kocks RSB at Charter Steel–Cleveland Division
David Light (top left), production manager, Charter Steel–Cleveland Division, Cuyahoga Heights, Ohio (lightd@chartersteel.com); Nicholas Currie, project manager — Rolling Division, Charter Steel, Saukville, Wis. (currien@chartersteel.com); W. Jürgen Ammerling (bottom left), managing director — sales and marketing, Friedrich Kocks GmbH & Co. KG, Hilden, Germany (ammerling@kocks.de); and Sergio A. Filippini (bottom right), president, Kocks Pittsburgh Co., Pittsburgh, Pa. (sfilippini@kockspittsburgh.com)
Charter Steel–Cleveland Division upgraded its existing
reducing and sizing block (RSB) into a full
independently driven 5-stand 300/5 RSB. This paper describes how the modernization impacted the quality of the finished product and increased both the mill’s flexibility and overall economy.
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41
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The Rolling of
Universal Channels at
Nucor Steel–Texas
David Light (top left), production manager, Charter Steel–Cleveland Division, Cuyahoga Heights, Ohio (lightd@chartersteel.com); Nicholas Currie, project manager — Rolling Division, Charter Steel, Saukville, Wis. (currien@chartersteel.com); W. Jürgen Ammerling (bottom left), managing director — sales and marketing, Friedrich Kocks GmbH & Co. KG, Hilden, Germany (ammerling@kocks.de); and Sergio A. Filippini (bottom right), president, Kocks Pittsburgh Co., Pittsburgh, Pa. (sfilippini@kockspittsburgh.com)
To resolve roll breakage and out-of-tolerance problems with nonstandard 4-inch channels at Nucor Steel–Texas, a new pass design utilizing a universal beam setup in the finisher was developed. This paper discusses the approach, the problems encountered and the issues that were resolved.
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Economic Production on Bar and Wire Rod Mills
Hubert Mueller, director of sales, SMS Meer GmbH, Moenchengladbach, Germany (hubert.mueller@sms-meer.com)
This paper discusses the various technological
developments from SMS Meer that increase mill
utilization, allow extra-close bar tolerances and
provide twist-free coiling.
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59
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High-strength Cold Drawn Seamless Steel Tubes With Improved Toughnessat Low Temperature in Transverse Direction
Emanuele Paravicini Bagliani, technological coordinator, Eduardo Altschuler, product manager, Michele Solano, product engineer, and Alberto Pessina, sales manager, Tenaris Dalmine, Dalmine, Italy (epbagliani@tenaris.com, ealtschuler@tenaris.com, dalmso@dalmine.it, apessina@dalmine.it); and Pierangelo Marchetti, quality regional director, Tenaris Tamsa, Veracruz, Mexico (pmarchetti@tamsa.com.mx)
A high-strength grade of cold drawn seamless steel tubes has been developed with a modified process that improves its toughness and reliability at low
temperature within certain applications, such as
hydraulic cylinders. The effects of this improvement on burst behavior are presented.
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66
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Steels for High-performance Diesel Engines
Christelle Lemaitre, research engineer — metallurgy, Ascometal CREAS, Cedex, France (c.lemaitre@ascometal.lucchini.com); Pierre Dierickx, metallurgy and quality department head manager, Ascometal Dunkerque Plant, Cedex, France (p.dierickx@ascometal.lucchini.com); and George Bittes, Ascometal Fos Sur Mer Plant, Fos sur Mer, France (g.bittes@ascometal.lucchini.com)
New microalloyed steel grades have been
developed to fit the working conditions of diesel engines. Chemical analysis, mechanical properties, fatigue
performance and more are presented in relation to the
different processes concerned, such as deep rolling and autofrettage.
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