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Volume 24 Issue 12
Dec.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(12): 1370-1378
Jian-long Guo, Yan-ping Bao,  and Min Wang, Cleanliness of Ti-bearing Al-killed ultra-low-carbon steel during different heating processes, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1370-1378. https://doi.org/10.1007/s12613-017-1529-8
Cite this article as:
Jian-long Guo, Yan-ping Bao,  and Min Wang, Cleanliness of Ti-bearing Al-killed ultra-low-carbon steel during different heating processes, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1370-1378. https://doi.org/10.1007/s12613-017-1529-8
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研究论文Open Access

Cleanliness of Ti-bearing Al-killed ultra-low-carbon steel during different heating processes

  • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

  • 通讯作者:

    Yan-ping Bao    E-mail: baoyp@ustb.edu.cn

  • During the production of Ti-bearing Al-killed ultra-low-carbon (ULC) steel, two different heating processes were used when the converter tapping temperature or the molten steel temperature in the Ruhrstahl-Heraeus (RH) process was low:heating by Al addition during the RH decarburization process and final deoxidation at the end of the RH decarburization process (process-I), and increasing the oxygen content at the end of RH decarburization, heating and final deoxidation by one-time Al addition (process-Ⅱ). Temperature increases of 10℃ by different processes were studied; the results showed that the two heating processes could achieve the same heating effect. The T.[O] content in the slab and the refining process was better controlled by process-I than by process-Ⅱ. Statistical analysis of inclusions showed that the numbers of inclusions in the slab obtained by process-I were substantially less than those in the slab obtained by process-Ⅱ. For process-I, the Al2O3 inclusions produced by Al added to induce heating were substantially removed at the end of decarburization. The amounts of inclusions were substantially greater for process-Ⅱ than for process-I at different refining stages because of the higher dissolved oxygen concentration in process-Ⅱ. Industrial test results showed that process-I was more beneficial for improving the cleanliness of molten steel.
    • Research ArticleOpen Access

    Cleanliness of Ti-bearing Al-killed ultra-low-carbon steel during different heating processes

    + Author Affiliations
      Abstract
    • During the production of Ti-bearing Al-killed ultra-low-carbon (ULC) steel, two different heating processes were used when the converter tapping temperature or the molten steel temperature in the Ruhrstahl-Heraeus (RH) process was low:heating by Al addition during the RH decarburization process and final deoxidation at the end of the RH decarburization process (process-I), and increasing the oxygen content at the end of RH decarburization, heating and final deoxidation by one-time Al addition (process-Ⅱ). Temperature increases of 10℃ by different processes were studied; the results showed that the two heating processes could achieve the same heating effect. The T.[O] content in the slab and the refining process was better controlled by process-I than by process-Ⅱ. Statistical analysis of inclusions showed that the numbers of inclusions in the slab obtained by process-I were substantially less than those in the slab obtained by process-Ⅱ. For process-I, the Al2O3 inclusions produced by Al added to induce heating were substantially removed at the end of decarburization. The amounts of inclusions were substantially greater for process-Ⅱ than for process-I at different refining stages because of the higher dissolved oxygen concentration in process-Ⅱ. Industrial test results showed that process-I was more beneficial for improving the cleanliness of molten steel.
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