第一作者：孙萌
通讯作者：姜周华,李阳
合写作者：陈常勇,马彦硕,马帅,李天赐,刘航
发表刊物：Ceramics International
期号：13
卷号：49
影响因子：5.1
DOI码：10.1016/j.ceramint.2023.04.014
所属单位：东北大学冶金学院
教研室：绿色智能特殊钢冶金研究中心
摘要：The current research, the degradation mechanism of MgO-MgAl2O4 dual-phase crucibles in contact with steel SCr420H with Si-Mn, Al, and Ce-Al deoxidation was investigated using a laboratory steelmaking experiment at 1873 K. The refractory interface in contact with the steel and inclusions was analysed using SEM and EPMA. In the case of Si-Mn deoxidation, the refractory's MgO phase was initially attacked by the dissolved Si, resulting in its transformation into the 2MgO-SiO2 phase, as confirmed by thermodynamic calculations. In the case of Al deoxidation, the reaction between the dissolved Al and the refractory had a significant effect on the increase in Mg concentration and MgAl2O4 inclusions. Refractory degradation was suppressed because the MgAl2O4 phase was an equilibrium phase based on thermodynamic consideration. The distribution of the MgAl2O4 phase in the refractory hindered the degradation reaction. The primary degradation mechanism in the case of Al deoxidation was steel penetration. In Ce-Al deoxidation, both Ce and Al were involved in refractory degradation. During this process, the MgO phase reacted with the dissolved Al, leading to its transformation into the MgAl2O4 phase, which was subsequently modified to the Ce-Al-O phase. Additionally, the MgAl2O4 phase was directly denatured into the Ce-Al-O phase.
关键字：Corrosion;MgO;Interfaces
论文类型：SCI
备注：无
学科门类：工学
一级学科：冶金工程
页面范围：21903-21915
ISSN号：0272-8842
是否译文：否