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Recently Published Articles
- Numerical, Physical, and Industrial Studies of Liquid Steel Chemical Homogenization in One Strand Tundish with Subflux Turbulence Controller
Article first published online: 24 OCT 2014 | DOI: 10.1002/srin.201400207
The object of investigation is an one-strand slab tundish. For the set zone of alloy feeding, numerical simulations, laboratory experiments (with a physical water model), and industrial experiments are carried out. The hybrid pulse-step method for introduction of an alloy addition to liquid steel is developed. In the tundishes with STC and dam, a reduction in mixing time is noted.
- Microalloying Effect on the Activation Energy of Hot Deformation
Moo-Young Seok, In-Chul Choi, Yakai Zhao, Dong-Hyun Lee, Jung-A. Lee and Jae-il Jang
Article first published online: 24 OCT 2014 | DOI: 10.1002/srin.201400255
In this study, through a series of hot compression tests of four different microalloyed steels, we systematically explore the influences of Nb, V, Ti, and Mo on the Q and have directly compared the effect of each element in a quantitative manner.
- Numerical Simulation of Flow-Induced Wall Shear Stresses in Three Different Shapes of Multi-Strand Steelmaking Tundishes
Md Irfanul Haque Siddiqui and Pradeep Kumar Jha
Article first published online: 15 OCT 2014 | DOI: 10.1002/srin.201400217
Numerical investigation of the effect of three different tundish shapes, i.e., boat, T-shape, and V-shape on generation of wall shear stress are carried out. Average wall shear stress value is maximum for V-shape tundish as compared to other two configuration tundishes. Similarity in variation of wall shear stress and turbulent kinetic energy is observed at different walls.
- Mathematical Modeling of Nitrogen Removal from the Vacuum Tank Degasser
Shan Yu, Jyrki Miettinen, Lei Shao and Seppo Louhenkilpi
Article first published online: 14 OCT 2014 | DOI: 10.1002/srin.201400093
This paper is focused on predicting nitrogen removal from the vacuum degasser specially taking into account the multi-component effect of steel composition. An integrated computational fluid dynamics (CFD) model is developed. Two operating diagrams are obtained to give the correlations between chemical reaction rate constant, initial nitrogen content, and final nitrogen content in liquid steel.
- Microstructural Refinement and Mechanical Properties of High-Speed Niobium-Microalloyed Railway Wheel Steel
Si Wu, Xiu-Cheng Li, Juan Zhang, Cheng-jia Shang and Raja Devesh Kumar Misra
Article first published online: 14 OCT 2014 | DOI: 10.1002/srin.201400236
The microstructure of railway wheel steel is refined and the percentage of ferrite is increased from 4 to 24% with the addition of 0.06% Nb. The addition of Nb inhibits mixed microstructure and delays the coarsening temperature of austenite grains from 880 to 960 °C. The impact energy at −20 °C is increased from 7.0 to 19.0 J with no apparent reduction in tensile strength. The grain refining and precipitation strengthening are roles of niobium in promoting ferrite–pearlite transformation and improving toughness in medium carbon steels.