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Precipitation behavior of magnetite in oxide scale during cooling of microalloyed low carbon steel

Journal Article


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Abstract


  • Precipitation behavior of magnetite particles in the thermal grown oxide scale during isothermal cooling of microalloyed low carbon steel was studied using scanning electron microscopy (SEM) and thin film X-ray. The oxide scale was generated from Gleeble 3500 Thermal-Mechanical Simulator connected with a humid air generator, to simulate 550 and 450°C isothermal treatments. Several types of magnetite precipitates were observed during different cooling processes with respect to the possible mechanisms of precipitation have been discussed. It is found that magnetite particles is as a result of pro-eutectoid precipitation from oxygen-rich wustite, and also as a product of the partial decomposition of wustite during the cooling process due to change of oxygen concentration and migration of iron ions. Furthermore, microalloyed elements in steel reduce the stability of wustite thereby facilitate the precipitation process, whose products of multi-phase oxide finally determine the adhesive strength of oxide scale and steel substrate. © (2012) Trans Tech Publications, Switzerland.

UOW Authors


  •   Yu, Xianglong (external author)
  •   Jiang, Zhengyi (external author)
  •   Yang, D. J (external author)
  •   Wei, Dongbin
  •   Yang, Quan (external author)

Publication Date


  • 2012

Citation


  • Yu, X., Jiang, Z., Yang, D., Wei, D. & Yang, Q. (2012). Precipitation behavior of magnetite in oxide scale during cooling of microalloyed low carbon steel. Advanced Materials Research, 572 249-254.

Scopus Eid


  • 2-s2.0-84869229006

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8210&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5278

Number Of Pages


  • 5

Start Page


  • 249

End Page


  • 254

Volume


  • 572

Abstract


  • Precipitation behavior of magnetite particles in the thermal grown oxide scale during isothermal cooling of microalloyed low carbon steel was studied using scanning electron microscopy (SEM) and thin film X-ray. The oxide scale was generated from Gleeble 3500 Thermal-Mechanical Simulator connected with a humid air generator, to simulate 550 and 450°C isothermal treatments. Several types of magnetite precipitates were observed during different cooling processes with respect to the possible mechanisms of precipitation have been discussed. It is found that magnetite particles is as a result of pro-eutectoid precipitation from oxygen-rich wustite, and also as a product of the partial decomposition of wustite during the cooling process due to change of oxygen concentration and migration of iron ions. Furthermore, microalloyed elements in steel reduce the stability of wustite thereby facilitate the precipitation process, whose products of multi-phase oxide finally determine the adhesive strength of oxide scale and steel substrate. © (2012) Trans Tech Publications, Switzerland.

UOW Authors


  •   Yu, Xianglong (external author)
  •   Jiang, Zhengyi (external author)
  •   Yang, D. J (external author)
  •   Wei, Dongbin
  •   Yang, Quan (external author)

Publication Date


  • 2012

Citation


  • Yu, X., Jiang, Z., Yang, D., Wei, D. & Yang, Q. (2012). Precipitation behavior of magnetite in oxide scale during cooling of microalloyed low carbon steel. Advanced Materials Research, 572 249-254.

Scopus Eid


  • 2-s2.0-84869229006

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8210&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5278

Number Of Pages


  • 5

Start Page


  • 249

End Page


  • 254

Volume


  • 572