Study on the Mechanism of Ferrite Precipitate Formation in the Crystallization of Magnesia-alumina Spinel Inclusion in Gr45 Steel

Xu Ying; Zhao Bo; Tian Bo; Wang Xing; Fu Jingchang

doi:10.7513/j.issn.1004-7638.2019.02.026

Volume 40 Issue 2

Apr. 2019

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Xu Ying, Zhao Bo, Tian Bo, Wang Xing, Fu Jingchang. Study on the Mechanism of Ferrite Precipitate Formation in the Crystallization of Magnesia-alumina Spinel Inclusion in Gr45 Steel[J]. IRON STEEL VANADIUM TITANIUM, 2019, 40(2): 149-155. doi: 10.7513/j.issn.1004-7638.2019.02.026

Citation:

Xu Ying, Zhao Bo, Tian Bo, Wang Xing, Fu Jingchang. Study on the Mechanism of Ferrite Precipitate Formation in the Crystallization of Magnesia-alumina Spinel Inclusion in Gr45 Steel[J]. IRON STEEL VANADIUM TITANIUM, 2019, 40(2): 149-155. doi: 10.7513/j.issn.1004-7638.2019.02.026

Citation:

Xu Ying, Zhao Bo, Tian Bo, Wang Xing, Fu Jingchang. Study on the Mechanism of Ferrite Precipitate Formation in the Crystallization of Magnesia-alumina Spinel Inclusion in Gr45 Steel[J]. IRON STEEL VANADIUM TITANIUM, 2019, 40(2): 149-155. doi: 10.7513/j.issn.1004-7638.2019.02.026

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Study on the Mechanism of Ferrite Precipitate Formation in the Crystallization of Magnesia-alumina Spinel Inclusion in Gr45 Steel

doi: 10.7513/j.issn.1004-7638.2019.02.026

1. Institute of Materials, North China University of Science and Technology, Tangshan 063009, Hebei, China;
2. Institute of Yisheng, North China University of Science and Technology, Tangshan 063009, Hebei, China;
3. Institute of Information, North China University of Science and Technology, Tangshan 063009, Hebei, China

Received Date: 2019-01-15
Available Online: 2023-12-02

Abstract

Abstract

Based on the basic principles of thermodynamics and the theory of mismatch degree, the formation process of MG-Al Spinel in Gr 45 steel is calculated and analyzed.When the temperature is below liquid line,given certain oxygen activityAlO form prior to MgO.At a given elemental content,Magnesia-alumina spinel inclusions can be produced as long as there is a trace of magnesium.It is proved that the matching relationship between Mg-Al Spinel and ferrite is good,and it is easy to form a common lattice structure,which provides a good substrate for the crystallization of ferrite.
- Gr 45 steel,
- crystalline ferrite,
- magnesia-alumina spinel,
- activity,
- formation of gibbs free energy,
- two-dimensional mismatch