First‐Principles Calculation and In Situ Observation on the Precipitation of Inclusions during Solidification of a High Sulfur Steel-Reference-Cited by-同舟云学术

First‐Principles Calculation and In Situ Observation on the Precipitation of Inclusions during Solidification of a High Sulfur Steel

Published:2024-08-12 Issue: Volume: Page:
ISSN:1611-3683
Container-title:steel research international
language:en
Short-container-title:steel research int.

Author:

Yang Haixin¹,Ren Ying²^ORCID,Wang Jinshu³,Zhang Lifeng⁴^ORCID

Affiliation:

1. Faculty of Materials and Manufacturing Beijing University of Technology (BJUT) Beijing 100124 China

2. School of Metallurgical and Ecological Engineering University of Science and Technology Beijing (USTB) Beijing 100083 China

3. Key Laboratory of Advanced Functional Materials Faculty of Materials and Manufacturing Beijing University of Technology Beijing 100124 China

4. School of Mechanical and Materials Engineering North China University of Technology Beijing 100144 China

Abstract

The precipitation process of inclusions in the high sulfur steel with the cerium addition is observed using the high‐temperature confocal scanning laser microscope (CSLM). Rare earth (Re) inclusions formed in the molten steel, and MnS inclusions precipitate along grain boundaries or on oxide cores at the end of solidification. With the addition of cerium, the average aspect ratio of inclusions in the steel decreases from 6.5 to 5.0, and the addition of cerium effectively modifies the elongated MnS. Thermodynamic calculations show the inclusion transformation during solidification, yet it lacked the formation of Ce2O2S and Re sulfides. According to the first‐principles calculation, the priority of the inclusion formation was Ce2O3 > CeAlO3, Ce2O2S > CeS > Ce3S4 > MnS. The stability of MnS inclusions is much lower than that of cerium‐containing inclusions. It is in situ observed that the addition of cerium promotes the formation of cerium‐containing inclusions and reduces the precipitation of MnS in the high sulfur steel.

Funder

Key Technologies Research and Development Program

National Natural Science Foundation of China

Publisher

Wiley

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1002/srin.202400465

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