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| Application of heat absorption method to reduce macrosegregation during solidification of bearing steel ingot |
| Sheng Yu1, Long-qiang Zhu1, Jin-hu Lai1, Ming-xu Pan2, Yue-yun Liu2, Wei-dong Xuan1, Jiang Wang1, Chuan-jun Li1, Zhong-ming Ren1 |
| 1 State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2 Daye Special Steel Co., Ltd., Huangshi 435001, Hubei, China |
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Abstract The control of macrosegregation is still a difficult problem for the production of large steel ingots. In order to develop new techniques for producing low-macrosegregation and high-quality steel ingots, the effect of the heat absorption method (HAM) used by the inorganic material rods to cool the liquid steel on the formation of macrosegregation during solidification of a 5-t GCr15SiMn bearing steel ingot was studied using experiment and mathematical simulation. The inorganic material was a mixture of CaF2 and CaO. The levels of macrosegregation in the longitudinal sections of two ingots with and without HAM were compared. Experimental results showed that the application of HAM reduced the positive segregation in the upper part of the ingot and the negative segregation in the lower part. The levels of carbon segregation along the longitudinal centerline and horizontal direction at different heights were all alleviated and the fluctuation of carbon segregation was significantly reduced. The simulation results confirmed that the melting and floating of the inorganic material could carry the sensible heat to the top of the liquid steel quickly. This leads to the acceleration of the cooling rate of the liquid steel, thereby alleviating the level of macrosegregation.
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| Cite this article: |
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Sheng Yu,Long-qiang Zhu,Jin-hu Lai, et al. Application of heat absorption method to reduce macrosegregation during solidification of bearing steel ingot[J]. Journal of Iron and Steel Research International, 2022, 29(12): 1915-1926.
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Qi-peng Dong, Jiong-ming Zhang, Yan-bin Yin, Hiromi Nagaumi. Numerical simulation of macrosegregation in billet continuous casting influenced by electromagnetic stirring[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(4): 612-627. |
| [2] |
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| [3] |
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| [4] |
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2022, Vol. 29 
