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Agglomeration Mechanism of Complex Ti-Al Oxides in Liquid Ferrous Alloys Considering High-Temperature Interfacial Phenomenon
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0003-0533-6729
Uddeholms AB Voestalpine Co, Uvedsvagen 15, S-68331 Hagfors, Sweden..
2019 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 50, no 6, p. 2694-2705Article in journal (Refereed) Published
Abstract [en]

This work presents the agglomeration mechanism of complex Ti-Al oxides in the liquid ferrous alloy. Cluster characteristics were investigated using Al and Ti/Al-complex deoxidation method in lab scale. The time-dependent size distribution, total number per volume, average size, and circularity of the clusters were quantitatively analyzed. Furthermore, high-temperature confocal laser scanning microscopy was utilized to directly observe the cluster formation of Ti-Al oxides. A capillary force model including wettability parameters was applied to compare the agglomeration capabilities of different types of non-metallic inclusions. When a low Ti is added into melt, the agglomeration of TiOx center dot FeO liquid inclusions is one of the key factors to decrease the frequency of cluster formation. When the Al is added into melt, the heterogeneous precipitation on TiOx center dot FeO surfaces is the main reaction process. Ti-Al oxides have lower agglomeration ability than that of Al2O3, which in turn, contribute to a low agglomeration frequency as well.

Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 50, no 6, p. 2694-2705
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-266285DOI: 10.1007/s11663-019-01686-xISI: 000500982500020Scopus ID: 2-s2.0-85073996343OAI: oai:DiVA.org:kth-266285DiVA, id: diva2:1383587
Note

QC 20200108

Available from: 2020-01-08 Created: 2020-01-08 Last updated: 2020-01-08Bibliographically approved

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Mu, Wangzhong

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