Transient Inclusion Formation and Evolution in Silicon Killed Steels

Abstract

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.

Department(s)

Materials Science and Engineering

Second Department

Electrical and Computer Engineering

Keywords and Phrases

Ferroalloy dissolution; Inclusion formation and evolution; Transient inclusions

International Standard Serial Number (ISSN)

1743-2812; 0301-9233

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 SAGE Publications; Institute of Materials, Minerals and Mining (UK), All rights reserved.

Publication Date

01 Jun 2015

Link to Full Text

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