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2011 October Issue
Full Table of Contents
Process Metallurgy & Product Applications |
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About the Cover
The world's strongest 4-roll bending machine, exerting a force of 8,600 tons. This machine is designed to produce a shell section with 2,000 mm internal diameter and 4,300 mm cylindrical length from a 120 mm-thick plate with a yield strength of 700 MPa at room temperature.
Photo courtesy of AG der Dillinger Hüttenwerke.
Full magazine available in the Members Only Area - NEW UPGRADED FORMAT! |
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Technical Features Table of Contents
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| 59 |
Model of Microalloy Precipitation During Continuous Casting and Reheating
Kun Xu and Brian G. Thomas (top left), C.J. Gauthier Professor of Mechanical Engineering, Mechanical Science and Engineering Department, University of Illinois at Urbana-Champaign, Urbana, Ill., USA (kunxu2@illinois.edu, bgthomas@illinois.edu); Myra S. Dyer (top right), John G. Speer (bottom left), professor, and David K. Matlock (bottom right), director, George S. Ansell department of metallurgical and materials engineering, Advanced Steel Processing and Products Research Center, Colorado School of Mines, Golden, Colo., USA (mdyer@mines.edu, jspeer@mines.edu, dmatlock@mines.edu)
A comprehensive set of models of precipitate formation during steel processing has been developed. In this work, it is applied to investigate Nb(C,N) precipitation in thin microalloyed steel slabs during continuous casting, reheating in a tunnel furnace and water quenching relative to the position within the slab and alloy content. |
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Qualitative and Quantitative Techniques for Evaluating Manganese Segregation in Advanced High-Strength Steels at ArcelorMittal Dofasco’s No. 1 Continuous Caster
Joydeep Sengupta (top left), senior research leader; Jim Casey (top right),
macroscopy specialist, retired; Don Crosbie (bottom left), senior research leader — primary processes; and Brian D. Nelson (bottom center), manager — flat rolling research and development, ArcelorMittal Global R&D Hamilton, Hamilton, Ont., Canada (joydeep.sengupta@arcelormittal.com, jimcasey@shaw.ca,
don.crosbie@arcelormittal.com, brian.nelson@arcelormittal.com); George Kladnik (bottom right), general manager, Advanced Analytical, Flagstaff, Ariz., USA (gakaa@aol.com); and Ning Gao, X-Ray Optical Systems Inc., East Greenbush, N.Y., USA (ngao@xos.com)
This work discusses a new quantitative technique for evaluating manganese segregation in continuously cast products using micro x-ray fluorescence, which is currently in development at ArcelorMittal Dofasco. |
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How to Evaluate a Process for Clean Steelmaking and Quality Control
P. Kaushik (top left), H. Yin (top right), H. Pielet (bottom left), and M. Lowry (bottom right), ArcelorMittal Global Research and Development, East Chicago, Ind., USA (pallava.kaushik@
arcelormittal.com, hongbin.yin@arcelormittal.com, howie.pielet@arcelormittal.com, michael.lowry@arcelormittal.com)
Improving steelmaking processes to adapt to the requirements of customers involves continuous monitoring. This article focuses on the use of measurement of complete steel and slag chemistry, inclusion analysis, process analysis and thermodynamics to assess the influence of process conditions on product properties. |
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MEMS Arrangements for Casting of Billets and Blooms: Selection of the Right Solution
Len Beitelman, Christopher Curran, David Domanski and Thomas Mulcahy, ABB Inc., Whitby, Ont., Canada (len.s.beitelman@ca.abb.com, chris.p.curran@ca.abb.com, david.a.domanski@ca.abb.com, thomas.p.mulcahy@ca.abb.com)
EMS is an essential part of steel billet and bloom production. This work compares internal, external and hybrid mold EMS arrangements in order to assist end users in making an informed decision on the best MEMS arrangement for their particular operation. |
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Influence of V(C,N) Precipitation Potential on Recovery Annealing Response of Microalloyed Sheet Steel
Justin Raines (top left), associate research engineer, SSAB Iowa, Muscatine, Iowa, USA
(justin.raines@ssab.com); David K. Matlock (top right), director, John G. Speer (bottom left), professor, George S. Ansell department of metallurgical and materials engineering, Advanced Steel Processing and Products Research Center, Colorado School of Mines, Golden, Colo., USA
(dmatlock@mines.edu, jspeer@mines.edu); and Robert J. Glodowski (bottom right), East Metals North America, Pittsburgh, Pa., USA (glodowski@na.eastmetals.biz)
This work examines microstructural changes in high-strength steels during recovery annealing, specifically, how controlling precipitation potential affects the recovery annealing process. |
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The Development of Wind Turbine Bolt Steels at China Steel Corp.
Shou-Chi Lin (left) and Jui-Fan Tu (right), China Steel Corp., Hsiao Kang, Kaohsiung, Republic of China (Taiwan) (110643@mail.csc.com.tw, 157800@mail.csc.com.tw)
A series of steels designed to meet the rigid strength, toughness and hardenability requirements of wind turbine bolts have been developed. This work examines the specific heat-treatment parameters of each steel, including temper embrittlement, tensile mechanisms and quench sensibility. |
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Evaluation of Low- and Medium-Carbon Nb-Microalloyed Plate Steels for Wind Tower Applications
Keith Taylor (top left), principal research engineer; Richard Bodnar (top right), director — research and development; and Todd Nelson (bottom left), director — applications engineering, SSAB Iowa, Muscatine, Iowa, USA (keith.taylor@ssab.com, rick.bodnar@ssab.com, todd.nelson@ssab.com); Steven Jansto (bottom center), market development manager, CBMM-Reference Metals Co., Bridgeville, Pa., USA (jansto@referencemetals.com); Henrietta Tsosie, Zhiyong Hu, Sheldon Mostovoy, and Philip Nash (bottom right), director, Thermal Processing Technology Center, Illinois Institute of Technology, Chicago, Ill., USA (htsosie@gmail.com, hu@iit.edu, mostovoy@iit.edu, nash@iit.edu)
This work presents the findings of an investigation that compared low- and medium-carbon steels as they relate to weldability, toughness and fatigue resistance in wind turbine towers.
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225 |
On the Major Improvements to Strength and Ductility of Steel
John G. Speer, professor, Advanced Steel Processing and Products Research Center, Colorado School of Mines, Golden, Colo., USA (jspeer@mines.edu)
A brief examination of recent claims related to “flash processing” technology in the science media and peer-reviewed literature reveals a pattern wherein the emphasis on rigorous analysis of factual data has been secondary to enthusiastic claims that sometimes lack scientific credibility. It is hoped that the remarks herein will stimulate additional dialogue and research that may help further separate fact from fiction in the area of rapid annealing.
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