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2012 February Issue
Full Table of Contents
Flat Product Rolling, Processing & Finishing and Rolls |
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About the Cover
IVC Technologies provided predictive technologies such as vibration analysis and infrared thermography designed to maximize availability, reliability and strip quality to ThyssenKrupp Steel USA for their state-of-the-art cold rolling line in their new Calvert, Ala., facilities.
Photo courtesy of ThyssenKrupp Steel USA.
Full magazine available in the Members Only Area. |
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Technical Features Table of Contents
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| 33 |
Current Developments of Alloyed Steels for Hot Strip Roughing Mills: Characterization of High-Chromium Steel and Semi-High Speed Steel
Jacqueline Lecomte-Beckers,
head of metallic materials science unit, aerospace and mechanics department, University of Liège, Liège, Belgium,
jacqueline.lecomte@ulg.ac.be; Mario Sinnaeve,
director, R&D and quality, Marichal Ketin Belgium, Liège, Belgium,
qualitycontrol@mkb.be; T. Jerome Tchuindjang,
researcher, MMS unit, University of Liège, Liège, Belgium,
j.tchuindjang@ulg.ac.be
Two alloys grades for work rolls used in the roughing stand of Hot Strip Mill — high chromium steel (HCS) and semi-high-speed steel (semi-HSS), In this paper, the new semi-high-speed steel grade is studied. |
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| 42 |
Checkered Plates Production Costs Reduced by Repeated Groove Milling Technology
Sombat Joongjitdumrong,
West Coast Engineering Co. Ltd., Bangsaphan, Prachuapkhirikhan, Thailand,
sombatj@wce.co.th;
Chainarong Rodseesean,
West Coast Engineering Co. Ltd., Bangsaphan, Prachuapkhirikhan, Thailand,
chainarongr@wce.co.th;
Kittiwut Siriprompisan,
West Coast Engineering Co. Ltd., Bangsaphan, Prachuapkhirikhan, Thailand,
kittiwuts@wce.co.th
The checker plate steel process of a hot strip mill requires a special roller in the finishing stand. This roller’s lifetime can be increased threefold by using repeated groove milling technology. |
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Roll Consumption Reduction at ArcelorMittal Burns Harbor 80-Inch Hot Strip Mill Through Roll Shop Grinding Practices and Mill Stability Improvements
Aislan L. Costa,
senior operating technology engineer, 80-inch hot strip mill, ArcelorMittal Burns Harbor,
Burns Harbor, Ind., USA,
aislan.costa@arcelormittal.com;
Jon T. Sims,
No. 2 roll shop process manager, 80-inch hot strip mill, ArcelorMittal Burns Harbor,
Burns Harbor, Ind., USA,
jon.sims@arcelormittal.com;
John M. Cahill,
process engineer, 80-inch hot strip mill, ArcelorMittal Burns Harbor, Burns Harbor, Ind., USA,
john.cahill@arcelormittal.com;
Peter Jackson,
subject matter expert, hot mill roll shop, ArcelorMittal Dofasco Inc.,
Hamilton, Ont., Canada,
peter.jackson@arcelormittal.com
Initiatives have been implemented to improve the roll cooling, mill stability and crowning practice at Burns Harbor’s hot strip mill. This paper will show how the Burns Harbor hot strip mill achieved a more than 40% roll consumption reduction, yielding almost US$1,500,000 savings annually.
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Determination of Corrosion Rates for Cold Rolling Coolant, Rolling Oil and Selected Tramp Oils
Mark A. Nicholls,
senior research leader, ArcelorMittal Dofasco Global Research and Development, Hamilton, Ont., Canada,
mark.nicholls@arcelormittal.com; Xiaoling Cheng,
senior researcher, ArcelorMittal Dofasco Global Research and Development, Hamilton, Ont., Canada; Rick Taylor,
senior technology specialist, ArcelorMittal Dofasco Global Research and Development, Hamilton, Ont., Canada
Quinn M. Springstead,
research specialist, ArcelorMittal Dofasco Global Research and Development, Hamilton, Ont., Canada
This paper describes the results obtained using an electrochemical technique to quantitatively rate the corrosion potential of coolant and neat oil solutions. A comparison of the corrosivity of these different solutions and the effect of different water types on different steel types will provide insight into the mechanism of corrosion and inhibition in a coolant system. |
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Fundamentals of Roll Cooling and Control of Flatness at Primary Cold Reduction
Daron Lloyd,
managing director, Lechler Ltd.,
Sheffield, U.K.,
nedmansour@lechlerusa.com
Optimized roll cooling header and spray nozzle arrangements contribute significantly in rolling cleaner strip and reducing coolant consumption, as well as in controlling fundamental flatness and efficient threading and tailing. This paper focuses on the important parameters in the cooling application and also general roll cooling fundamentals, including key operational issues in maintaining system condition and performance. |
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Advances in Coil-to-Plate Stretch Leveling Line Technologies
Michael F. Italiano Jr., senior project engineer; Ryan Mercer, mechanical engineer; and Edward S. Orzel, vice president — engineering, Butech Bliss, Salem, Ohio (mitaliano@butech.com, rmercer@butech.com, eorzel@butech.com);
Al Waigand, sales manager, Butech Bliss, Salem, Ohio; Richard W. Williams, president and COO, The Universal Steel Co., Cleveland, Ohio; and Haishi Zhao, mechanical engineer, Butech Bliss, Salem, Ohio (awaigand@butech.com, richardwilliams@univsteel.com, hszhao@butech.com)
Recent developments in coil-to-plate processing technology have made it possible to achieve the benefits associated with discrete plate stretching on coil-to-plate cut-to-length stretch leveling lines. This paper explores the issues that needed to be resolved, the solutions developed and the results encountered during start-up and commissioning of the new stretch leveling line at
Universal Steel Co. |
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186 |
A Laboratory Study of Factors Affecting Sulfide Shape Control in Plate Grade Steels
A. Dash,
(formerly) research assistant, materials science and engineering, Missouri University of Science & Technology,
Rolla, Mo., USA,
abhilash.dash@gmail.com; P. Kaushik ,
senior research engineer, ArcelorMittal Global Research & Development,
East Chicago, Ind., USA, pallava.kaushik@arcelormittal.com;
E. Mantel,
research technician, ArcelorMittal Global Research & Development,
East Chicago, Ind., USA,
erik.mantel@arcelormittal.com
Control over the formation and modification of MnS inclusions toward the end of solidification in ultralow-sulfur plate grade steels is critical. In this paper, the underlying mechanism for modification of both alumina and sulfide inclusions is discussed, and the importance of Ca treatment for ultralow-sulfur steels has been evaluated.
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