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Role of microalloying elements in the microstructure of hot rolled steels

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Published/Copyright: May 14, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 10

Abstract

A comparative study of some of the most important effects of the diverse microalloying elements on austenite and ferrite microstructure of hot rolled microalloyed steels is carried out. The values of different aspects such as pinning and driving forces, size of precipitates, activation energies or diffusion coefficients are discussed. Titanium is the most effective element to control grain growth at high reheating temperatures and a weight Ti/N ratio close to 2 is recommended. Aluminum can help to control grain growth at medium temperatures, but its addition to Ti steels can promote abnormal grain growth. Niobium is the most effective element to inhibit static recrystallization of austenite, due to the adequate precipitation temperature range at deformation temperatures and the strong pinning effect of Nb carbonitrides. Finally, the preferential nucleation of intragranular ferrite on particles such as vanadium carbonitrides enhances the ferrite grain refinement.

Keywords: Microalloyed steel; Thermomechanical processing; Recrystallization; Precipitation; Grain size
* Correspondence address Dr. Manuel Gómez, Department of Physical Metallurgy, National Center for Metallurgical Research (CENIM-CSIC), Av. Gregorio del Amo 8; 28040-Madrid, Spain, Tel.: +34 915 538 900 (348), Fax: +34 915 347 425, E-mail:

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Received: 2011-3-25
Accepted: 2011-8-16
Published Online: 2013-05-14
Published in Print: 2011-10-01

© 2011, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Laudatio für Frau Prof. Dr.-Ing. Christina Berger
  5. Review
  6. Role of microalloying elements in the microstructure of hot rolled steels
  7. Original Contributions
  8. Experimental study of phase equilibria in the “SnO2” – CaO – SiO2 system in air
  9. Thermodynamic modeling of the Cr – S system
  10. Observation of early melting stages of an Al – Cu alloy in a temperature gradient
  11. Knudsen effusion mass spectrometric studies of the B2 phase in the Al – Co system
  12. Microstructure evolution in hypereutectoid graphitic steel
  13. The effect of thermal treatment on the structural properties of copper-containing sol-gel silica nanocomposites
  14. Electrospray deposition of thin copper-indium-diselenide films
  15. Morphology, fibrous composition and tensile properties of drag-silk produced by two species of orb spider
  16. Magnetic properties of Co0.5Zn0.5Fe2O4 nanopowders prepared by means of the template-assisted hydrothermal method
  17. Effects of aging and sheet thickness on the room temperature deformation behavior and in-plane anisotropy of cold rolled and solution treated Nimonic C-263 alloy sheet
  18. Thermal expansion/contraction behavior of AA7050 alloy in the as-cast condition relevant to thermomechanical simulation of residual thermal stresses
  19. Obtaining high formability of IF-galvanized steel tailor welded blanks by applying optimum CO2 laser welding parameters
  20. Investigation of the dependence of structural and mechanical properties of cement-bonded bauxite refractories on their process conditions
  21. The effects of curing medium on the flexural strength and water permeability of cementitious composites containing Fe2O3 nanofillers
  22. DGM News
  23. DGM News
https://doi.org/10.3139/146.110585
Keywords for this article
Microalloyed steel; Thermomechanical processing; Recrystallization; Precipitation; Grain size

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Laudatio für Frau Prof. Dr.-Ing. Christina Berger
  5. Review
  6. Role of microalloying elements in the microstructure of hot rolled steels
  7. Original Contributions
  8. Experimental study of phase equilibria in the “SnO2” – CaO – SiO2 system in air
  9. Thermodynamic modeling of the Cr – S system
  10. Observation of early melting stages of an Al – Cu alloy in a temperature gradient
  11. Knudsen effusion mass spectrometric studies of the B2 phase in the Al – Co system
  12. Microstructure evolution in hypereutectoid graphitic steel
  13. The effect of thermal treatment on the structural properties of copper-containing sol-gel silica nanocomposites
  14. Electrospray deposition of thin copper-indium-diselenide films
  15. Morphology, fibrous composition and tensile properties of drag-silk produced by two species of orb spider
  16. Magnetic properties of Co0.5Zn0.5Fe2O4 nanopowders prepared by means of the template-assisted hydrothermal method
  17. Effects of aging and sheet thickness on the room temperature deformation behavior and in-plane anisotropy of cold rolled and solution treated Nimonic C-263 alloy sheet
  18. Thermal expansion/contraction behavior of AA7050 alloy in the as-cast condition relevant to thermomechanical simulation of residual thermal stresses
  19. Obtaining high formability of IF-galvanized steel tailor welded blanks by applying optimum CO2 laser welding parameters
  20. Investigation of the dependence of structural and mechanical properties of cement-bonded bauxite refractories on their process conditions
  21. The effects of curing medium on the flexural strength and water permeability of cementitious composites containing Fe2O3 nanofillers
  22. DGM News
  23. DGM News
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