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Materials Science and Technology Volume 39, 2023 - Issue 16
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Research Article

Improving microstructure and segregation of steel ingot by inorganic heat absorption method

Yangjian XuState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China
,
Jiang WangState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of ChinaCorrespondence[email protected] [email protected] [email protected]
,
Sansan ShuaiState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of ChinaCorrespondence[email protected] [email protected] [email protected]
,
Sheng YuState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China
,
Danqing JiangState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of ChinaCorrespondence[email protected] [email protected] [email protected]
,
Chaoyue ChenState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China
,
Tao HuState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China
&
Zhongming RenState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China
 show all
Pages 2544-2555 | Received 26 Feb 2023, Accepted 01 May 2023, Published online: 22 May 2023
 
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Abstract

A novel method by adding inorganic heat absorption material (IHAM) into the molten steel was proposed to improve the quality of large steel ingots. The IHAM was found to melt and float up after absorbing the heat of molten steel, stirring the melt and thus accelerating the cooling process. The molten steel was also purified as the inclusions were adsorbed during the floating of IHAM. The addition of IHAM rod was conducive to increase the equiaxed grain ratio (EGR) and alleviate the central carbon segregation, while the IHAM cored wire played a more important role in reducing the inclusion index. This method holds broad appeal to solidification of large steel ingot, as it can improve the microstructure of solidified ingot.

Acknowledgements

Shanghai Super-Postdoctoral Program of China (No. 2021166), Shanghai Rising-Star Program (20QA1403800 and 21QC1401500), Shanghai Science and Technology Committee (21511103600) financially support this work.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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