Journal of Northeastern University:Natural Science ›› 2013, Vol. 34 ›› Issue (1): 71-75.DOI: -

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Oxidation Kinetics and Oxide Scales Control of Hot-Rolled High Strength Steel

CAO Guang-ming1, SUN Bin1, LIU Xiao-jiang1, ZHANG Lin2   

  1. 1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; 2. NO.1 Steel Rolling Plant, Tangshan Co. of Hebei Iron and Steel Group, Tangshan 063009, China.
  • Received:2012-04-04 Revised:2012-04-04 Online:2013-01-15 Published:2013-01-26
  • Contact: CAO Guang-ming
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Abstract: The oxidation kinetics and transformation behaviors of FeO formed on high-strength steel (610L) were studied by oxide weight gain experiment and thermal simulation at different oxidation temperature and different isothermal holding time. Oxidation kinetic model under the condition of alternative temperature was derived, and the evolution rule of oxide scales of high-strength steel during hot strip rolling was studied. The isothermal transformation curves for 610L were measured. The results showed that the isothermal transformation of FeO includes two kinds of phase transformations, the first one is the proeutectoid precipitation of Fe3O4, and the second is the eutectoid transformation of FeO→Fe+Fe3O4. The range of the pro-eutectoid reaction “nose” temperature of 610L is 350~500℃, and the eutectoid reaction “nose” temperature is 350~450℃. These results are useful for the oxide scale structure control.

Key words: high strength steel, isothermal transformation, oxidation kinetics, eutectoid transformation, proeutectoid Fe3O4

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