Growth Rate and Phase Composition of Oxide Scales during Hot Rolling of Low Carbon Steel

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The rate of scale growth on low carbon steel in air over the temperature range 600-1200°C and the phase composition changes that occur between 750-1200°C were investigated. The low carbon steel was oxidized with the air velocity of 4.2 cm/s in order to approximate the formation of secondary and tertiary scales in hot rolling. In addition, some experiments were performed with a lower air velocity of 0.14 cm/s. Above 1000°C, with the air velocity of 4.2 cm/s, a transition from a parabolic rate of oxidation to a linear rate of oxidation was observed as the temperature increased. This transition in oxidizing mechanisms was related to the porosity of the oxide scale. The phase composition of the oxide scales changed with temperature and time. For the initial 30 s of oxidation, wustite was the predominant phase in the temperature range 800-1200°C and as oxidation proceeded, the percentages of magnetite and hematite increased. The homogeneity of the oxide decreased as the oxidation temperature increased. At 850°C, with the air velocity of 4.2 cm/s, the oxide was homogeneous, and for the first 120 s of oxidation, the oxide had a high percentage of wustite and a low percentage of hematite. This indicates that 850°C is the ideal temperature for the finishing strip mill in order to reduce work roll wear and surface defects.

収録刊行物

  • ISIJ international

    ISIJ international 44(9), 1554-1559, 2004-09-15

    一般社団法人 日本鉄鋼協会

参考文献:  17件中 1-17件 を表示

  • <no title>

    LENARD J. G.

    Mathematical and Physical Simulation of the Properties of Hot Rolled Products 136, 1999

    被引用文献1件

  • <no title>

    BLAZEVIC D. T.

    37th MWSP Conf. Proc., 1996 33, 1996

    被引用文献1件

  • <no title>

    MATSUNO F.

    Trans. Iron Steel Inst. Jpn. 20, 413, 1980

    被引用文献1件

  • <no title>

    ABULUWEFA H.

    Ph. D. Thesis, McGill University, 1996

    被引用文献1件

  • <no title>

    RANDLE V.

    Introduction to Texture Analysis : Macrotexture, Microtexture & Orientation Mapping 148, 2000

    被引用文献1件

  • <no title>

    CULLITY B. D.

    Elements Of X-Ray Diffraction 411, 1978

    被引用文献2件

  • <no title>

    BIEDERMAN R. R.

    Advances in X-Ray Analysis 17, 139, 1974

    被引用文献1件

  • <no title>

    AVERBACH B. L.

    Trans. AIME 176, 401, 1948

    被引用文献2件

  • <no title>

    KOFSTAD P.

    High Temperature Corrosion 227, 1988

    被引用文献1件

  • <no title>

    PILLING N. B.

    J. Inst. Med. 29, 529, 1923

    被引用文献1件

  • <no title>

    JONES D. A.

    Principles and Prevention of Corrosion 419, 1996

    被引用文献1件

  • <no title>

    WAGNER C.

    Z. Phys. Chem., Neue Folge 21B, 25, 1933

    被引用文献1件

  • <no title>

    KRZYZANOWSKI M.

    Steel Res. 70, 22, 1999

    被引用文献4件

  • <no title>

    LI C. S.

    J. Mater. Process. Technol. 116, 201, 2001

    被引用文献2件

  • <no title>

    VERGNE C.

    Wear 250, 322, 2001

    被引用文献2件

  • <no title>

    WOLF M. M.

    Iron Steelmaker 27, 114, 2000

    被引用文献1件

  • <no title>

    SCHWERDTFEGER K.

    Steel Res. 74, 538, 2003

    被引用文献4件

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