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Influence of metallurgical processing parameters on defects in cold-rolled steel sheet caused by inclusions

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Abstract

The cleanliness and defects for cold-rolled steel sheet caused by inclusions are greatly influenced by parameters in the metallurgical processing. Good control of parameters during the processing can lead to a better product. In this paper, data mining was used to explore the influence of parameters on defects in steel sheets. A decision tree model was established and it was found that the oxygen content before deoxidation, the end-point temperature of the converter, and the temperature before deoxidation had a great impact on the defects in the cold-rolled sheet that were caused by inclusions. This finding was confirmed by experiments with infrared absorption, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and automatic inclusion analysis methods. After optimization according to results from the model and experiments, the defect rate caused by the inclusions was reduced from 0.92% to 0.38%.

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Acknowledgement

This work was financially supported by the National Natural Science Foundation of China (No. 51704203).

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Authors and Affiliations

  1. School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China

    Rui Wang, Zhi-jie Yan, Da-zhao Li & Yan Kang

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

    Yan-ping Bao

  3. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, China

    Yi-hong Li

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  1. Rui Wang
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  2. Yan-ping Bao
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  3. Yi-hong Li
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  4. Zhi-jie Yan
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  5. Da-zhao Li
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  6. Yan Kang
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Correspondence to Rui Wang.

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Wang, R., Bao, Yp., Li, Yh. et al. Influence of metallurgical processing parameters on defects in cold-rolled steel sheet caused by inclusions. Int J Miner Metall Mater 26, 440–446 (2019). https://doi.org/10.1007/s12613-019-1751-7

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  • DOI: https://doi.org/10.1007/s12613-019-1751-7

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