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Interfacial Reactions During Titanium Dissolution in Liquid Iron: A Combined Experimental and Modeling Approach

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Abstract

The dissolution behavior of Ti in liquid Fe has been investigated experimentally and theoretically within the framework of inclusion formation in steel. In the experimental study, Ti cylinders have been immersed into liquid Fe and, subsequently, water-quenched. Macroscopic observation of quenched samples shows the initial solidification of an Fe shell around the Ti. Microstructural analysis of the Fe-Ti interfacial area with a scanning electron microscope equipped with an energy dispersive X-ray spectrometer reveals that a reaction zone develops in a three-step process: formation of a first liquid eutectic layer rich in Ti, formation of a second eutectic layer rich in Fe, and then mixing of both layers. The reaction zone grows in thickness up to 40 pct of the original sample radius and dissolves both parts of the Ti sample and the Fe shell. A simplified, one-dimensional, implicit finite volume model has been used to describe these phenomena theoretically. Good qualitative agreement is achieved between experiment and model. The model has been used to estimate the influence of original addition size, preheating, convection, and superheating on the required melt-back time.

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Acknowledgments

L. Pandelaers acknowledges the financial support from the IWT Grant SB-61446. F. Verhaeghe acknowledges the support of the Research Foundation - Flanders (FWO - Vlaanderen) through a postdoctoral fellowship. L. Pandelaers also would like to thank J. Fransaer for the constructive discussions as well as ArcelorMittal Research and Development for the support.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001, Leuven, Belgium

    Lieven Pandelaers (Ph.D. Student), Frederik Verhaeghe (Postdoctoral Fellow), Bart Blanpain (Full Professor) & Patrick Wollants (Full Professor)

  2. ArcelorMittal Research and Development, Voie Romaine BP 30320, F-57280, Maizières-lès-Metz, France

    Pascal Gardin (Research Engineer)

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  1. Lieven Pandelaers
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  2. Frederik Verhaeghe
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  3. Bart Blanpain
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  4. Patrick Wollants
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  5. Pascal Gardin
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Correspondence to Lieven Pandelaers.

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Manuscript submitted January 22, 2009.

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Pandelaers, L., Verhaeghe, F., Blanpain, B. et al. Interfacial Reactions During Titanium Dissolution in Liquid Iron: A Combined Experimental and Modeling Approach. Metall Mater Trans B 40, 676–684 (2009). https://doi.org/10.1007/s11663-009-9273-8

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