steel research international
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Online ISSN: 1869-344X
Materials Science Weekly Newsletter
Recently Published Articles
- A Calorimetric Study of Recovery and Recrystallization in Fe–14.4 Cr–15.4 Ni–2.4 Mo–2.36 Mn–0.25 Ti–0.04 C–0.05 P (mass %) Austenitic Stainless Steel
Haraprasanna Tripathy, Subramaniam Raju, Arun Kumar Rai and Tamanna Jayakumar
Article first published online: 24 MAY 2013 | DOI: 10.1002/srin.201300002
Thermally activated dissipation of stored energy and resulting microstructural reorganization of a Ti-added steel have been monitored by dynamic calorimetry. The studies revealed that the kinetics of stored energy release and resulting structure formation is basically a dispersive one, involving more than one relaxation time. However, it is possible to isolate the energy barriers for recovery and recrystallization stages by modeling the rate of energy dissipation through isokinetic formalism of thermally activated rate processes.
- Mechanism of Dry Molten Slag Granulation Using a Rotating Multi-Nozzle Cup Atomizer
Qin Yuelin, Lv Xuewei, Bai Chenguang, Chen Pan, Qiu Guibao and Zhang Jie
Article first published online: 16 MAY 2013 | DOI: 10.1002/srin.201300007
The rotary multi-nozzle cup atomizer is proposed to granulate the molten slag at a high cooling rate without water consumption in this study. The disintegration mechanism, flight trajectory and heat transfer models of the droplet have been successfully developed. The results can provide guidance for designing the commercialized atomizer and optimizing the operation parameters of atomizer.
- Development of Prefused Synthetic Flux for Basic Oxygen Steel Making through Micro-Pelletization and Sintering of Iron Oxide Fines
Jagannath Pal, Satadal Ghorai, Pasumarthi Venkatesh, Manik Chandra Goswami and Debajyoti Bandyopadhyay
Article first published online: 16 MAY 2013 | DOI: 10.1002/srin.201200324
Mixture of waste iron oxide fines and lime fines are micro-pelletized without binder using CO2/industrial waste gas at room temperature that can provide a good handling strength. Subsequently, the developed micro-pellets are sintered without using coke breeze. Waste materials itself provides heat for sintering. The produced sinter would be useful as a synthetic flux in basic oxygen process for early formation of oxidizing slag to make refining faster.
- The Effect of Na2O and K2O on the Partition Ratio of Phosphorus between CaO–SiO2–FetO–P2O5 Slag and Carbon-Saturated Iron
Guangqiang Li, Chengyi Zhu, Yongjun Li, Xiongyuan Huang and Min Chen
Article first published online: 16 MAY 2013 | DOI: 10.1002/srin.201200216
The partition ratios of phosphorous between CaO–SiO2–FetO–P2O5 slag with Na2O or K2O addition and solid pure iron were measured at different temperatures to learn about those between the same slag and carbon-saturated iron. The experimental results shows that both Na2O and K2O addition can improve the dephosphorization ability of the experimental slag and they have similar dephosphorization ability under the same experimental conditions.
- Adiabatic Carbon Rate of Alternative Ironmaking Processes to Produce Hot Metal
Xin Jiang, Lin Wang, Fengman Shen and Weikao Lu
Article first published online: 13 MAY 2013 | DOI: 10.1002/srin.201200339
In present work, adiabatic carbon rates are compared between smelting reduction and direct reduction along idealized conditions. Both oxygen-enrich and pre-heating air are optimized methods to decrease carbon rate of hot metal production. From the figure, the total adiabatic carbon rate of “Direct reduction-Melting” process may be lower than 440 kg tHM−1.