Formation and Modification of MgO·AI₂O₃-Based Inclusions in Alloy Steels
Editor(s)
Laughlin, David E.
Abstract
The current study performed thermadynamic calculation, laboratory experiments, and industrial trials for the formation and modification of MgO-Al2O3 spinel inclusions in alloy steels. The stability Mg-Al-O diagram was obtained using the thermodymanic study. The resulting MgO-Al2O3-CaO inclusions from MgO-Al2O3 spinel inclusions after the calcium treatment were spherical, and > 5 μm MgO-Al2O3-CaO inclusions have a two-layer structure: an outside CaO-Al2O3 layer and a MgO-Al2O3 core. The modification of > 5 μm MgO·Al2O3 spinel inclusions by calcium treatment includes two steps: (1) reducing MgO in the inclusion into the dissolved magnesium by the dissolved calcium in the steel and (2) generating a liquid xCaO·yAl2O3 layer at the outside of the spinel inclusion. For <2 μm MgO·Al2O3 spinel inclusions, they can possibly be modified into a xCaO·yAl2O3 inclusion by reducing all MgO component in the spinel inclusions with the added calcium.
Recommended Citation
S. Yang et al., "Formation and Modification of MgO·AI₂O₃-Based Inclusions in Alloy Steels," Metallurgical and Materials Transactions B, Springer Verlag, Jan 2012.
The definitive version is available at https://doi.org/10.1007/s11663-012-9663-1
Department(s)
Materials Science and Engineering
Research Center/Lab(s)
Peaslee Steel Manufacturing Research Center
Keywords and Phrases
Nanotechnology; Characterization and Evaluation of Materials; Metallic Materials; Structural Materials; Surfaces and Interfaces-Thin Films
International Standard Serial Number (ISSN)
1073-5615
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2012 Springer Verlag, All rights reserved.
Publication Date
01 Jan 2012