1 School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China; 2 State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114051, Liaoning, China; 3 Technology Center, Shandong Iron and Steel Company Ltd. Laiwu Company, Laiwu 271100, Shandong, China
Effect of trace Si on MgOAl2O3 inclusion in ultra-low-carbon steel
1 School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China; 2 State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114051, Liaoning, China; 3 Technology Center, Shandong Iron and Steel Company Ltd. Laiwu Company, Laiwu 271100, Shandong, China
摘要 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, 2MgOSiO2, 3Al2O32SiO2, and 2MgO2Al2O35SiO2 and 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 the xMgOyAl2O3–Mg–Al–Si–O and xAl2O3ySiO2–Mg–Al–Si–O inclusions.
Abstract：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, 2MgOSiO2, 3Al2O32SiO2, and 2MgO2Al2O35SiO2 and 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 the xMgOyAl2O3–Mg–Al–Si–O and xAl2O3ySiO2–Mg–Al–Si–O inclusions.
Lei Cao,De-li Shang,Xin-gang Ai, et al. Effect of trace Si on MgOAl2O3 inclusion in ultra-low-carbon steel[J]. Journal of Iron and Steel Research International, 2021, 28(4): 402-412.
2021, Vol. 28 
