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September
2004 |
| Inclusion
Analysis to Predict Casting Behavior
Scott R. Story, senior
project research engineer, and Thomas J. Piccone, senior research
engineer, U. S. Steel Corp. Research and Technology Center,
Monroeville, Pa.; Richard J. Fruehan, U. S. Steel Professor,
Materials, Science and Engineering Dept., Carnegie Mellon
University, Pittsburgh, Pa.; and M. Potter, R.J. Lee Group,
Monroeville, Pa. (srstory@uss.com)
Techniques
are being developed to rapidly identify inclusions in steel
so that potential problems can be addressed. Here, casting-related
issues at U. S. Steel Gary and Fairfield Works are examined
in order to
discover the causes of clogging and to predict casting behavior
and erosion. |
Comprehensive
Mold and Oscillator Monitoring
Matthew J. Korzi, manager
— casting automation, Jason E. Arzberger, computer engineer,
SMS Demag Inc., Pittsburgh, Pa.; and William H. Emling, plant
manager — Unimold division, Millcraft SMS Services,
Oil City, Pa. (jason.arzberger@sms-demag.net or bemling@millcraft-sms.net)
A comprehensive monitoring system has been developed to minimize
the expense and loss of production associated with mold breakouts.
The system can either provide portable oscillator monitoring
service or be incorporated into existing sticker detection
systems. |
Valbruna:
New Continuous Casting Machine for Stainless Steel
Dario Lestani, director
— CCM Dept., Wogler D. Ruzza, senior engineer —
metallurgy, and Andrea Miconi, process engineer — steelmaking,
Danieli Centro Met, Buttrio, Italy (info@danieli.com)
Innovations in such areas as mold level control of liquid
steel have resulted in one of the most advanced continuous
casting machines for stainless steel. With this machine, Acciaierie
Valbruna has seen both increased quality and productivity.
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Continuous
Caster Roll Improvements From Machine Head Through Horizontal
Section
Sascha Plewka, general
manager — product and business development, Voest-Alpine
Services & Technologies Corp., Pittsburgh, Pa., and Alfred
T. Donet, plant superintendent, Voest-Alpine Services &
Technologies Corp., Baltimore, Md. (sascha.plewka@vastcorp.com)
Performance enhancements to continuous caster rolls have been
achieved through physical design changes, utilization of various
roll overlay types, changes in roll base material, as well
as changes in seal and bearing configurations. These enhancements
have led to cost savings and significant increases in roll
lifetimes. |
Heat
Balance of SIDERAR Continuous Casting
Raúl Daniel
López, steelmaking project engineer, SIDERAR, Buenos
Aires, Argentina, and mechanical flow professor, National
Technical University – San Nicolás Regional College,
San Nicolás, Argentina (apalod@siderar.com)
A model of heat balance and solidification was applied to
a continuous casting machine at SIDERAR. Based on the study’s
results, improvements to the cooling system were made, leading
to increased heat extraction capacity, reliability and water
quality, and thereby increased production.
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