Effect of trace Si on MgO·Al2O3 inclusion in ultra-low-carbon steel
Effect of trace Si on MgO·Al2O3 inclusion in ultra-low-carbon steel
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DOI：
10.1007/s42243-020-00529-3
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发表时间：
2021-02
影响因子：
2.5
通讯作者：
Lei Cao;Deli Shang;Ai Xingang;Pengliang Jin;Yuanyou Xiao;Guocheng Wang;Chun-wei Liu
中科院分区：
文献类型：
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作者：
Lei Cao;Deli Shang;Ai Xingang;Pengliang Jin;Yuanyou Xiao;Guocheng Wang;Chun-wei Liu
在mg处理的含微量Si的al -脱氧超低碳钢中观察到4种类型的Mg-Al-Si-O夹杂物，分别是SiO2、2MgO·SiO2、3Al2O3·2SiO2和2MgO·2Al2O3·5sio2及其复合夹杂物。利用FactSage软件计算了1473 ~ 2073 K时Mg-Al-Si-O体系的相关系，发现Si含量的变化会改变不同mg - al - Si基夹杂物的稳定区域范围。根据实验观察到的包裹体类型，预测了包裹体的形成途径，并建立了描述xmgo·yAl2O3-Mg-Al-Si-O和xal2o3·ySiO2-Mg-Al-Si-O包裹体形成过程的动力学模型。
There are four types of Mg–Al–Si–O inclusions observed in the Mg-treated Al-deoxidized ultra-low-carbon steel containing trace Si, including SiO2, 2MgO·SiO2, 3Al2O3·2SiO2, and 2MgO·2Al2O3·5SiO2and their composite inclusions. Using FactSage, the phase relationship of Mg–Al–Si–O system at 1473–2073 K was calculated using FactSage software, and the change in Si content can change the stable region range of different Mg–Al–Si–O-based inclusions. Based on the types of inclusions observed experimentally, the formation pathways of inclusions were predicted and a kinetic model was established to describe the formation process of thexMgO·yAl2O3–Mg–Al–Si–O andxAl2O3·ySiO2–Mg–Al–Si–O inclusions.