August 2009
Vol. 6, No. 8 - Full Table of Contents
Flat Product Rolling & Finishing
About the Cover |
A panel of leading steel industry executives recently took part in the AISTech 2009 Town Hall Forum. Pictured: (front row, left to right) Keith E. Busse, chairman and CEO, Steel Dynamics Inc.; Louis L. Schorsch, executive vice president, ArcelorMittal, and president and CEO, ArcelorMittal Flat Americas; John D. Callaway, Town Hall Forum moderator; (second row, left to right) Dieter Hoeppli, managing director — investment banking, UBS Securities LLC; Joseph Curtin, vice chairman and COO, Tube City IMS LLC; George J. Koenig, president, Berry Metal Co. and Town Hall Forum chair; (back row, left to right) Ronald E. Ashburn, AIST executive director; Ladd R. Hall, executive vice president of sheet products, Nucor Corp.; James P. Hrusovsky, CEO, Severstal Columbus LLC; and John H. Goodish, executive vice president and COO, United States Steel Corporation. A summary of the Town Hall Forum begins on page 27. Cover photographer: Bill Sawalich of Barlow Productions.
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Correction from the 2009 August Issue
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| The Cranes Technology Committee held a meeting on May 31, just prior to the 16th Annual AIST Crane Symposium in Pittsburgh, Pa. |
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| 37 |
The Development and Market Introduction of
the Second-Generation Chrome-Free Passivated Galvanized Steel
Arno H.R. Harmsen, Wim Laging and Marjon Zonneveld, Corus Research, Development & Technology, IJmuiden, The Netherlands (arno.harmsen@corusgroup.com); Egbert Jansen and Catherine E. Price, Corus Strip Products IJmuiden, IJmuiden, The Netherlands
Following the switch to fully chrome-free passivation for its hot-dip galvanized steel, Corus Strip Products began developing a second generation of the product. This paper presents the product’s extensive testing and its introduction into customer sites. |
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| 48 |
Development of a New Solid-State Joining Process for Endless Hot Rolling
Jong-Sub Lee, Youn-Hee Kang, Chun-Soo Won and Seung-Lak Son, POSCO, Pohang, Korea (jonglee2@posco.com, yhkang@posco.com, wonan@posco.com, santana@posco.com); and Kenji Horii, Mitsubishi-Hitachi Metals Machinery Inc., Hiroshima, Japan
POSCO has developed a new solid-state joining
process that satifies three prerequisites for endless hot rolling. The endless hot rolling line at POSCO’s No. 2 hot strip mill has been in commercial production since January 2007, with more than 100,000 tons of coils produced per month. |
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57 |
Application of Low-Volume Lubrication and Liquid Nitrogen in the Final Stand of a Tandem Cold Mill
Hartmut Pawelski (left), general manager — metal forming and surface technology, SMS Siemag AG, Düsseldorf, Germany (hartmut.pawelski@sms-siemag.com), and Hans-Peter Richter (right), senior specialist — design, hot and cold rolling mills, SMS Siemag AG, Hilchenbach, Germany (hape@sms-siemag.com)
A system has been developed for application of low-volume lubrication and liquid nitrogen to industrial skinpass mills. This paper presents fundamentals of the system, as well as layout features and first test results in the final stand of a cold tandem mill. |
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66 |
Mechanisms of Work
Roll Degradation in Hot Strip Mills
Gisèle Walmag and Xavier Vanden Eynde, CRM, Liège, Belgium (walmag@rdmetal.ulg.ac.be, vdeneynde@rdmetal.ulg.ac.be); Mario Sinnaeve and Vincent Lecomte, Marichal-Ketin, Liège, Belgium (rolls@mkb.be)
This paper deals with laboratory studies devoted to
a better understanding of degradation mechanisms and their respective interactions. The focus is on
thermal fatigue and oxidation. Specific attention is paid to the influence of roll cooling water composition on oxidation.
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| 75 |
Solving the Insoluble: Electrolytic Tinning Lines With Insoluble Anodes
Giovanni Astengo (left), research and development manager, Tenova Strip Processing, Genova, Italy (giovanni.astengo@it.tenovagroup.com), and Thomas DeLoia (right), sales manager, Tenova Strip Processing, Pittsburgh Pa.(thomas.deloia@us.tenovagroup.com)
Tenova has created a modern insoluble anode
tinplating process, already proven on the industrial line at Ternium Siderar. The process is able to achieve a very low tin loss, a productivity rate of more than 30 kg/hour can be confirmed for each plating cell.
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82 |
Investigation Into the Effects of Leveling Roll Diameter Variation on Coupling Shear Pin Breakage of a Hot Plate Leveler
Yuli Liu (pictured), manager — process engineering and development, and Mike Levick, general manager, Quad Engineering Inc., Toronto, Ont., Canada (y.liu@quadeng.com, m.levick@quadeng.com)
A new model to calculate the effect of leveling roll size variation was developed based on contact mechanics.
The model calculates the additional torque induced by the roll diameter variation and the tolerable roll
diameter variation for integrated driving levelers.
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157 |
Suspension Reduction Technology for Ironmaking With Low CO2 Emission and Energy Requirement
H.Y. Sohn, Moo Eob Choi, Y. Zhang and Joshua E. Ramos, Department of Metallurgical Engineering, University of Utah, Salt Lake City, Utah
A new technology for alternate ironmaking based on direct gaseous reduction of iron ore concentrate is under development, which would reduce energy consumption by nearly 38% of the amount required by the blast furnace and drastically lower environmental pollution, especially CO2 emission, from the steel industry. The technology is aimed toward the production of iron as a feed to the steelmaking process, eventually replacing the blast furnace. Feasibility of the technology is presented based on the material and energy balances and comprehensive rate measurements using concentrate particles, together with preliminary scale-up test results using a bench-scale test facility.
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