|
|
|
|
|
2012 August Issue
Full Table of Contents
Long Products, Pipe & Tube Products |
 |
About the Cover
AIST executives stand together with a panel of leading steel industry executives who took part in the AISTech 2012 Town Hall Forum in Atlanta, Ga., in May. Pictured (left to right): Ronald E. Ashburn, AIST executive director; André B. Gerdau Johannpeter, chief executive officer, Gerdau; Dieter Hoeppli, managing director, Deutsche Bank Securities Inc.; Michael S. Williams, senior vice president — North America flat rolled operations, United States Steel Corporation; Christian Dohr, president and chief executive officer, ThyssenKrupp Steel USA LLC; P.S. Venkataramanan, chief executive officer — long carbon North America, ArcelorMittal; David A. Sumoski, vice president and general manager, Nucor Steel; George J. Koenig, president, Berry Metal Co.; and Jon Delano, money and politics editor, KDKA-TV (CBS), Pittsburgh, and adjunct professor, Carnegie Mellon University. A summary of AISTech 2012 and the Town Hall Forum begins on page 37.
Photo courtesy of Ross DeLoach, Northlight Photography Inc., Tucker, Ga.
Full magazine available in the Members Only Area. |
|
| |
Technical Features Table of Contents |
| 99 |
Tensile Behavior and Fracture Properties of X80 Linepipe Steel
M.J. Gaudet,
The University of British Columbia, Vancouver, B.C., Canada,
mgaudet@interchange.ubc.ca;
W.J. Poole,
The University of British Columbia, Vancouver, B.C., Canada,
warren.poole@ubc.ca
In this study, X80 steel is subjected to heat treatments to produce samples containing different amounts and morphologies of bainite, ferrite and martensite-retained austenite (MA). These microstructures were then subjected to tensile and fracture testing, the results of which are presented in this paper. |
|
| 106 |
Recent Cost Reduction Developments in the Heating of Steel
Steven J. O’Connor,
senior applications engineer, Bloom Engineering Co., Pittsburgh, Pa.,
soconnor@bloomeng.com;
Anthony G. Fennell,
western regional manager, Bloom Engineering Co., Pittsburgh, Pa.,
tfennell@bloomeng.com
In China, several hot strip mill furnaces have been built, firing 90% regeneratively. Continuous oxygen monitoring and control of the in-furnace atmosphere is an inexpensive way to save small amounts of fuel. Scale-free heating consists of firing the furnace “fuel rich” in the hotter zones, and then the reducing waste gases are combusted in the cooler zones. The savings associated with the elimination of the generated scale is worth the investment in fuel. |
|
113 |
Lubrication of a Seamless
Pipe Sizing Mill
James DiLonardo,
technical manager — tube and pipe products, Houghton International, Valley Forge, Pa.
jdilonardo@houghtonintl.com; Carl Kennedy,
technical director — metal rolling, Houghton International, Valley Forge, Pa.,
ckennedy@houghtonintl.com
This paper examines the application of hot rolling lubricant to a single-stand vertical breakdown mill and a 3-stand sizing mill producing seamless oil country tubular goods. The application of the hot rolling lubricant, including equipment engineering, is outlined. Measurement performance through quantitative results and subsequent benefits are discussed.
|
|
120 |
Quenched and Tempered Bar
Jacob Selzer,
plant metallurgist and quality assurance manager, CMC Steel Arizona, Mesa, Ariz., jacob.selzer@cmc.com
In-line quenching and tempering has allowed CMC Steel Arizona to have a higher-ductility bar at higher strength levels compared with classic rebar production, with a substantial reduction in alloy consumption. The results of implementing this process have ranged from improved bundle quality to combined high-strength and high-ductility steel.
|
|
127 |
The Effect of Microstructure on the
Mechanical Properties of X80 Microalloyed Steel
K. Jonsson,
M.Sc. candidate, University of Alberta, Edmonton, Alta., Canada,
kjonsson@ualberta.ca;
D. Ivey,
professor of materials engineering, director, Alberta Centre for Surface Engineering and Science (ACSES), University of Alberta, Edmonton, Alta., Canada;
H. Henein,
professor of materials engineering, University of Alberta, Edmonton, Alta., Canada;
S. Nafisi,
research engineer, EVRAZ Inc. NA, Regina, Sask., Canada,
shahrooz.nafisi@evrazincna.com
The aim of this study was to determine the relationship between microstructure and work-hardening characteristics of an X80 microalloyed steel. An interrupted thermal treatment process was applied to generate a variety of microstructures in various fractions and morphologies.
|
|
134 |
Sustainable Plate Manufacturing
Sarah Haine,
research associate, Department of Materials Science and Engineering, The University of Sheffield, Sheffield, South Yorkshire, U.K.,
s.v.haine@sheffield.ac.uk;
Richard Thackray,
Tata Steel Lecturer in Steelmaking, Department of Materials Science and Engineering, The University of Sheffield, Sheffield, South Yorkshire, U.K.,
r.thackray@sheffield.ac.uk;
Mick Steeper,
technology manager — rolling, Siemens plc, Sheffield, South Yorkshire, U.K.,
mick.steeper@siemens.com
The current production trend in microalloyed plate is to use increasing slab thickness to provide larger percentage reductions. However, with the use of microalloying elements to retard grain growth and promote the formation of acicular ferrite, large reductions may not be necessary. This will be investigated using the hot deformation technique of plane strain compression testing. |
|
245 |
Investigation on MgO·Al2O3-Based Inclusions in Steels
Shufeng Yang (top left), Lifeng Zhang (top center) (zhanglifeng@ustb.edu.cn) and Liyuan Sun (top right), School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China;
Jingshe Li (bottom left), School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China; and Kent D. Peaslee (bottom right), F. Kenneth Iverson Steelmaking Chair, Department of Materials Science & Engineering, Missouri University of Science and Technology (Missouri S&T), Rolla, Mo., USA
MgO·Al2O3-based inclusions in alloy steel during the refining process were analyzed. Three kinds of inclusions were observed, and formation mechanisms were proposed. The influence of slag basicity and pressure of the refining furnace on magnesium content during vacuum treatment were studied by thermodynamic calculations. The results show that magnesium content increases with the increase of slag basicity and aluminum content in molten steel, and decreases with increasing CO partial pressure.
|
|
|
|
|
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 |
