|
|
July
Vol. 6, No. 7 - Full Table of Contents
Continuous Casting Technologies
About the Cover |
John J. Ferriola, chief operating officer of steelmaking operations for Nucor Corp. and the 2009 AIST Steelmaker of the Year, is pictured before the Castrip® facility’s laminar cooling table at Nucor Steel–Indiana, Crawfordsville, Ind. Ferriola’s keynote address from the President’s Award Breakfast at AISTech 2009 in St. Louis, Mo., begins on page 95. Cover photo courtesy of Shawn Spence Photography.
|
|
| 33 |
Nucor Steel Seattle: Improvements Resulting From the Modernization of the 4-Strand Billet Caster
John Gregord, manager of engineering and projects, Concast America Inc., Pittsburgh, Pa. (john.gregord@concastusa.com)
Nucor Steel Seattle’s caster upgrade focused on core components such as cartridge molds, electromechanical
oscillators and advanced automation. As a result,
production has increased, maintenance has been reduced and quality has improved.
|
|
| 42 |
Experience With an Innovative On-Line Inclusion Determination System for Liquid Steel
Randall P. Stone (left), senior product engineer, and Clayton C. Liu (right), senior research engineer, Heraeus Electro-Nite Co., Langhorne, Pa. (randy.stone@heraeus.com); and Peter C. Glaws, scientist — process and product advancement, The Timken Co., Canton, Ohio (peter.glaws@timken.com)
The ESZ-PAS® measurement system can immediately determine the amount of large inclusions or inclusion clusters in a giving sample of liquid steel. The system can be used to predict the characterization and cleanliness
of the finished product. |
|
| 49 |
Control of Gas Bubbles and Slag Layer in a Ladle Furnace by Electromagnetic Stirring
Ulf Sand (top left), design analysis, Hongliang Yang (top right), senior metallurgist, and Jan-Erik Eriksson (bottom left), R&D manager, ABB AB Metallurgy, Västerås, Sweden (ulf.sand@se.abb.com, hongliang.yang@se.abb.com, jan-erik.a.eriksson@se.abb.com); and Rebei Bel Fdhila (bottom right), senior principal scientist, ABB AB Corporate Research, Västerås, Sweden (rebei.bel_fdhila@se.abb.com)
Several new operational modes for refining steel in a ladle furnace are proposed, namely using a combination
of gas and electromagnetic stirring. Improvements in desulfurization, re-oxidation, inclusion removal and mixing time are discussed. |
|
|
60 |
Thermomechanical Modeling of Beam Blank Casting
Lance C. Hibbeler (top), Kun Xu and Brian G. Thomas (bottom left), University of Illinois at Urbana-Champaign, Urbana, Ill. (lhibbel2@uiuc.edu, kunxu2@uiuc.edu, bgthomas@uiuc.edu); Seid Koric (bottom right), engineering applications analyst and technical coordinator for industrial projects, National Center for Supercomputing Applications (NCSA), Urbana, Ill. (skoric@ncsa.uiuc.edu); and Clayton Spangler, Steel Dynamics Inc. Structural and Rail Mill, Columbia City, Ind. (clayton.spangler@stld-cci.com)
Computational models of the mold and steel shell
have been developed to investigate mold taper, gap formation, crack formation, and the effects of mold distortion and oscillation during beam blank casting. The models have been validated with plant
measurements.
|
| 75 |
Mold Level System Upgrade at ArcelorMittal Dofasco’s No. 1 Caster
Carlyle Singh (left), Steelmaking Technology, ArcelorMittal Dofasco Inc., Hamilton, Ont., Canada (carlyle.singh@arcelormittal.com); Xavier Rabec (center), SERT METAL USA, Appleton, Wis. (x.rabec@sert-metal.com); and Michel Dussud (right), AVEMIS, Saint Martin en Haut, France (m.dussud@avemis.fr)
The clearly defined scope, requirements and
performance guarantees of ArcelorMittal Dofasco’s No. 1 continuous caster mold level system led to the implementation of innovative systems and equipment by the OEM. Resulting performance improvements are discussed.
|
84 |
Recent Developments in Strand Condition Monitoring Devices
Adrian I.F. Leek, sales manager, Sarclad Ltd., Derbyshire, U.K. (adrian_leek@sarclad.com)
This paper describes the development and application of strand condition monitors and their widespread use by caster operators. The benefits and limitations
of these devices, as well as the requirements for
successful application, are discussed.
|
167 |
Advancements in Steel for Weight Reduction of P900 Armor Plate
R.A. Howell and J.S. Montgomery, Survivability Materials Branch, Army Research Lab, Aberdeen Proving Grounds, Md. (rahm9c@mst.edu); and D.C. Van Aken, Missouri University of Science and Technology, Rolla, Mo.
Ballistic tests were conducted on a high-manganese and high-aluminum austenitic steel that is age hardenable. These lightweight steels (12–18% lower in density) were investigated as alternatives to MIL-PRF-32269 steel alloys for application in P900 perforated armor currently used for U.S. Army ground combat systems. Two steel plates with nominal composition in wt. % of Fe-30Mn-9Al-1Si-0.9C-0.5Mo were evaluated for V50 against 0.30-caliber armor piercing and 0.50-caliber fragmentation simulation projectiles. At equivalent areal densities to current steels, both plates surpassed the required 0.30-caliber acceptance criteria by 188 and 151 feet/second. Against the 0.50-caliber fragmentation projectile, the calcium-treated plate exceeded the MIL-A-46100 V50 by 225 feet/second, but the non-calcium-treated plate underperformed by 39 feet/second.
|
| |
Coming Next Month....
Flat Product Rolling & Finishing plus a Review of AISTech 2009 and the Town Hall Forum
|
|
|
 |
