Transient inclusion formation and evolution in silicon killed steels. (June 2015)

• Record Type: Journal Article
• Authors: Thapliyal, V.; Kumar, A.; Robertson, D. G. C.; Smith, J. D.
• Is Part Of: Ironmaking & steelmaking. Volume 42:Number 5(2015)
• Page Start: 382
• Page End: 394
• Publication Date: 2015-06
• Subjects: Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1179/1743281214Y.0000000241
• Languages: German
• ISSNs: 0301-9233

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Transient inclusion formation in low carbon silicon killed steel as a result of ferroalloy additions of ferro-silicon (Fe75Si) and ferro-manganese (FeMn) (for de-oxidation and alloying) was studied in the laboratory using a novel experimental technique. Inclusion chemistries and morphologies were analysed using automated scanning electron microscopy (ASPEX). Formation of these inclusions was studied using thermodynamic software (FactSage) and a mechanism was proposed. Effect of solute concentration gradients during alloy dissolution and mixing was observed. Inclusions which formed initially, at low concentrations of ferroalloy, were liquid phase with a high concentration of FeO. Depending on the ferroalloy addition, initial inclusions become richer in SiO₂ or MnO. Inclusions also underwent further phase transformations on cooling.</p> </abstract>