Iron & Steel Technology
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September 2006
Vol. 3, No. 9
Process Metallurgy and Product Applications

About the Cover

Steel that once stood as the World Trade Center has been forged as 24 tons of steel in the bow of the future USS New York. Construction of the enw U.S. Navy warship, named to honor the heroism of the people of New York, is being carried out by Northrop Grumman Ships Systems, the largest manufacturing employer of the states of Louisiana and Mississippi.

21
An Interview With Daniel R. DiMicco, 2006 Steelmaker of the Year

The Steelmaker of the Year Award is presented annually by AIST to recognize notable leaders and their contributions to the steel industry. Daniel R. DiMicco received the honor on May 3 during the President’s Award Breakfast at AISTech 2006 in Cleveland, Ohio. Cited for his entrepreneurial spirit, distinguished leadership and exceptional contributions to the steel industry, DiMicco was lauded for his steadfast guidance of Nucor Corp. through a period of significant growth and changing global dynamics, as well as his enduring vision of future steelmaking opportunities.
27
Mechanism of Edge Splitting During Coil Slitting
Qiulin Yu (pictured), chief metallurgist, Peyton Nicholson, process metallurgist — rolling, Daniel Green, process metallurgist — melting, and Dan Dickinson, process engineer — casting, Nucor Steel Tuscaloosa Inc., Tuscaloosa, Ala. (qyu@nucortusk.com, pnicholson@nucortusk.com, dgreen@nucortusk.com, ddickinson@nucortusk.com)

The root cause of edge splitting during coil slitting was investigated in view of both metallurgy and mechanics. Through optimized operating practices on the LMF, continuous caster and slitter, the splitting defect can be minimized.
38
Recent Developments in HSM Rougher Rolls — Risks and Chances
Karl Heinz Ziehenberger, development engineer, and Michael Windhager, head of research and development, Eisenwerk Sulzau-Werfen, Tenneck, Austria (zi@esw.co.at, wr@esw.co.at)

The increase in size and shell thickness of rougher rolls for finishing mills may lead to problems not encountered with smaller rolls. Different roll grades are discussed in light of increasing performance without increasing the risk of roll failure.
43
Aluminum and Vanadium Competition for Nitrogen in Thin Slab Processing
Jennifer A. Garrison, Caterpillar, Sumter, S.C. (jennie.garrison@gmail.com); John G. Speer and Steven W. Thompson, Advanced Steel Processing and Products Research Center, Colorado School of Mines, Golden, Colo. (jspeer@mines.edu, sthompso@mines.edu); Robert J. Glodowski, Stratcor Performance Materials, Pittsburgh, Pa. (bob.glodowski@stratcor.com); and Keith P. Williams, Nucor, Armorel, Ark. (kwilliams@nucorar.com)

The effect of the aluminum level on microalloying response was characterized via several methods for two vanadium-microalloyed steels that differ in aluminum content. Results reveal the causes of increased strength levels and slower recrystallization after cold rolling.
52
A Study of Casting Issues Using Rapid Inclusion Identification and Analysis
Scott R. Story (top left), research specialist, U. S. Steel Research and Technology Center, Munhall, Pa. (srstory@uss.com); Gerry E. Goldsmith (top right), area manager — steelmaking and casting, U. S. Steel Gary Works, Gary, Ind. (ggoldsmith@uss.com); Richard J. Fruehan (bottom left), U. S. Steel Professor, Materials Science and Engineering Dept., Carnegie Mellon University, Pittsburgh, Pa. (fruehan@andrew.cmu.edu); Gary S. Casuccio, vice president, Michael S. Potter (bottom right), senior scientist, and David M. Williams, project manager, RJ Lee Group, Monroeville, Pa. (gcasuccio@rjlg.com, mpotter@rjlg.com, dwilliams@rjlg.com)

ASCAT, the automated steel cleanliness analysis tool, provides information on inclusions that can help solve problems related to steel castability and quality. Results of ASCAT’s application during transient casting events are presented here.
63
Effect of C, Mn, Si and Al Additions on the Mechanical Properties of 980 MPa Tensile Strength, Cold Rolled, Advanced High-strength Steel
Narayan Pottore (top left), staff research engineer — product research, Nina Fonstein (top right), manager — product research, Indra Gupta (bottom left), principal research engineer — product research, and Debanshu Bhattacharya (bottom right), director — product research, Mittal Steel USA Research and Development Center, East Chicago, Ind. (narayan.pottore@mittalsteel.com, nina.fonstein@mittalsteel.com, indra.gupta@mittalsteel.com, debanshu.bhattacharya@mittalsteel.com)

There is a growing need to improve coil shape/flatness, to make steel more formable and weldable, and to minimize the mechanical property variation within and between coils. This paper addresses the effects of various additions and anneal parameter variations on the mechanical properties of steel.
72
The Steel Industry and Universities Working Together: The Tenaris Experience
Juan Carlos Gonzalez (top left), product development director, Daniel Krishock (top right), Roberto Rocca Education Program director, Fabio Tonolini (bottom left), TenarisUniversity director, and Raul Topolevsky (bottom right), TenarisUniversity Industrial School dean, Tenaris, Buenos Aires, Argentina (ftonolini@tenaris.com, rtopolevsky@tenaris.com)

Attracting, developing and retaining talented technical graduates are major challenges for the steel industry. This article describes the numerous initiatives to attract students undertaken by Tenaris, including scholarships, internships and training programs.
154
Computational Fluid Dynamics: Advancements in Technology for Modeling Iron and Steelmaking Processes
M. Cross, professor, T.N. Croft, senior research officer, D. McBride, research officer, A.K. Slone, senior research officer, and A.J. Williams, senior research officer, School of Engineering, University of Wales Swansea, Swansea, Wales (m.cross@swansea.ac.uk); and C. Bailey, professor, and K. Pericleous, professor, Centre for Numerical Modeling and Process Analysis, University of Greenwich, London, England

Computational fluid dynamics (CFD) software technology has formed the basis of many investigations into the behavior and optimization of primary iron and steelmaking processes for the last 25+ years. The objective of this contribution is to review the progress in CFD technologies over the last decade or so and how this can be brought to bear in advancing the process analysis capability of primary ferrous operations. In particular, progress on key challenges such as compute performance, fluid-structure transformation and interaction, and increasingly complex geometries are highlighted.

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