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A Method to Reduce the Oxide Scale of Silicon-Containing Steels by Adjusting the Heating Route

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Abstract

A method to reduce the scale of silicon-containing steels by adjusting the heating route has been proposed in the present study. The influence of heating rate on the oxidizing behavior of steels containing Si was studied by simultaneous thermal analyzer with various heating rates under the condition of the fixed heating time and same heating temperature. The heating process was divided into two sections, i.e., fast heating stage and slow-heating stage. Three kinds of heating route with different end temperatures at fast heating stage and different heating rates at slow-heating stage were designed. Additionally, the solidification process of Fe2SiO4 at different cooling rates was observed by in situ observation. The results showed that the amount of Fe2SiO4 and oxidation mass gain both decreased with the decrease of end temperature at fast-heating stage. Likewise, the net-like distribution of Fe2SiO4 became less apparent with the decrease of end temperature at fast-heating stage and the increase of the heating rate at slow-heating stage. Therefore, it would be beneficial for descaling with a heating route of a lower end heating temperature at the fast-heating stage and a higher heating rate at slow-heating stage. Besides, the solidifying point of Fe2SiO4 decreased apparently at a higher cooling rate.

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Acknowledgements

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (NSFC) (No. 51274154); The Major Projects of Technology Innovation of Hubei Province (2017000011). The National Nature Science Foundation of China (No. 51704217), Special Fund of Wuhan University of science and Technology for Master Student’s short-term studying abroad.

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, 947 Heping Avenue, Qingshan District, Wuhan, 430081, China

    Qing Yuan, Guang Xu, Bei He, Ming-xing Zhou & Hai-jiang Hu

Authors
  1. Qing Yuan
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  2. Guang Xu
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  3. Bei He
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  4. Ming-xing Zhou
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  5. Hai-jiang Hu
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Correspondence to Guang Xu.

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Yuan, Q., Xu, G., He, B. et al. A Method to Reduce the Oxide Scale of Silicon-Containing Steels by Adjusting the Heating Route. Trans Indian Inst Met 71, 677–684 (2018). https://doi.org/10.1007/s12666-017-1200-0

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  • DOI: https://doi.org/10.1007/s12666-017-1200-0

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