|
August
2007
Vol. 4, No. 8
Flat Product Rolling & Finishing Technologies
About the Cover
Leading industry executives and members of the AISTech 2007 Town Hall Forum are pictured: (front row, left to right) George J. Koenig, president, Berry Metal Co., session chair; Joseph D. Russo, senior vice president and chief technical officer, IPSCO Inc.; Mark D. Millett, executive vice president, Steel Dynamics Inc.; John D. Callaway, Town Hall Forum moderator; (back row, left to right) Michael J. Wagner, executive vice president and chief commercial officer, SeverCorr LLC; Leonard H. Chuderewicz, executive vice president — operations, Mittal Steel USA; Larry T. Brockway, vice president and treasurer, United States Steel Corp.; Giffin F. Daughtridge, vice president and general manager, Nucor Steel–Hertford County; Alain F. Bouruet-Aubertot, president and general manager, Minteq; and Ronald E. Ashburn, AIST Executive Director. (The Town Hall Forum feature begins on page 38.) Photo courtesy of Banayote Photography Inc., Indianapolis, Ind.
|
|
|
57
|
The Effect of the Number of Leveling Rolls on the Straightening Process
Richard P. Smith Jr., manager — process and product design, quality assurance, ArcelorMittal, Coatesville, Pa. (richardp.smith@mittalsteel.com)
The effect of the number of leveling rolls on the mechanism of straightening is examined, with emphasis on the residual curvature of material as it exits the leveler. The effect of the number of rolls on machine design is also discussed. |
|
|
70
|
Three-dimensional Simulation of Local Shape Defects in Continuous Cold Rolling
Yuli Liu (left), Jian Fan and Mike Levick, Quad Engineering Inc., Toronto, Ont., Canada (y.liu@quadeng.com, j.fan@quadeng.com, m.levick@quadeng.com); J.J. Fitzpatrick, research leader, and Brian D. Nelson (right), research and development manager — flat rolling, Dofasco Inc., Hamilton, Ont., Canada (john_j_fitzpatrick@dofasco.ca, brian_nelson@dofasco.ca)
Localized strip shape defects that can be caused by several common sources — such as hot band ridge and yield stress local drop — are simulated. The simulation results, which are useful for controlling and reducing local shape defects, are analyzed. |
|
|
30
|
AISTech 2007 Conference and Exposition Review
AISTech 2007, held May 7–10 at the Indiana Convention Center, Indianapolis, Ind., was once again the North American steel industry’s most important event of the year, with 5,550 in attendance, with 20% of the total from outside North America). Steel producers, suppliers, corporate executives and industry leaders, academia and students had the opportunity to attend more than 331 technical presentations during the four-day conference. The accompanying exposition, surpassing impressive figures from 2006, represented one of the largest expositions in the global steel industry, with a sold-out show floor spanning 58,975 square feet. |
|
| 36 |
AISTech 2007 Town Hall Forum
The following transcript is an abridged version of the Town Hall Forum panel discussion. |
|
|
81
|
Commissioning and Optimization of the Roll Gap Lubrication System at the ANSDK CSP Plant
Richard Arnken (left), product manager — hot rolling, steel — Europe, Quaker Chemical BV, Uithorn, Netherlands (arnkenr@quakerchem.com); Christian Bilgen (center), general manager — CSP technology, Muhr und Bender KG, Attendorn, Germany (christian.bilgen@mubea.com); and Wolfgang Hennig (right), formerly general manager — CSP technology, SMS Demag AG, Düsseldorf, Germany (wolfgang.hennig@sms-demag.com)
Depending on the design of the lubrication system and the used oil type, roll force reductions up to 50% can be achieved in CSP plants. This article reviews the implementation and optimization of CSP lubrication at Alexandria National Iron and Steel Corp. (ANSDK) in terms of mechanical design, lubrication technology and the used lubricant types. |
|
|
88
|
Spindle Lubrication Discovery on No. 2 RCM at Nucor Steel–Berkeley
Jason B. Curtis, meltshop maintenance supervisor, Nucor Steel–Berkeley, Huger, S.C. (curtisj@nucorsteel.com); Joseph A. Downie, vice president, Surface Engineering Associates, Aliquippa, Pa. (brightsea@icubed.com); and Martin J. Brown, chief engineer — mill products, Ameridrives Couplings, Erie, Pa. (martin.brown@ameridrives.com)
Problems with gear spindles on rolling mills are a common occurrence. This paper describes various design and lubrication trials that aided in troubleshooting the spindle problems experienced at Nucor Steel–Berkeley’s cold mill. |
|
|
99
|
Installation and Start-up of an Electrodischarge Roll Texturing Machine at California Steel Industries
Roy Dominguez (left), roll shop planner, California Steel Industries Inc., Fontana, Calif. (rdominguez@californiasteel.com); and Anthony G. Payling (right), vice president, Sarclad North America LP, Duquesne, Pa. (anthony.payling@sarcladusa.com)
CSI became the first North American steel producer to commission a Sarclad Rolltex EDT machine in its cold mill roll shop in late 2005. The start-up experience and the results of the first three months of production are reported in this paper. |
|
| 108 |
Ultramodern Coiling Temperature Control at Sollac, Lorraine
Michael A. Smith (left), senior systems engineer, Siemens Energy & Automation, Alpharetta, Ga. (smith.michael@siemens.com); and Klaus Weinzierl (right), Siemens AG, Erlangen, Germany
Sollac, Lorraine modernized its hot strip mill automation, including a coiling temperature model. The automation system model components are presented, along with the mathematical basis for the representations. |
|
| 205 |
The Effect of Manganese Silicate Mold Coatings on the Heat Transfer Rate During Steel Droplet Solidification
Paolo Nolli, Vesuvius Research, Pittsburgh, Pa. (paolo.nolli@us.vesuvius.com); and Alan W. Cramb, Clark and Crossan Professor and Dean of Engineering, Rensselaer Polytechnic Institute, Troy, N.Y. (cramb@rpi.edu)
In droplet solidification experiments, the heat extraction rate can be enhanced by the application of coatings on the cooling substrate surface. The objective of this study was to assess the effect of coatings of manganese silicate on the in-mold heat transfer rate. For this purpose, experiments in which liquid metal samples solidified in direct contact with a water-cooled copper chill were performed. The mold was either coated with manganese silicate by a powder flame spray technique or left uncoated. Heat fluxes during solidification were calculated, based on in-mold thermocouple measurements, for both mold surface conditions, and the results showed that the presence of the coating enhanced the heat extraction rate into the mold. The SEM analysis of the coating after the solidification experiments confirmed that, during the short time of the experiment, the coating melted at the mold-metal interface. These results suggest that such coatings could be used to affect heat transfer rates and productivity in strip casting. |
|
Association for Iron & Steel Technology
186 Thorn Hill Road • Warrendale, PA 15086-7528 USA
(724) 814-3000 • Fax: (724) 814-3001 • memberservices@aist.org
AIST Privacy Statement • Trademarks and Ownership |
