Equilibrium relationship between the oxide compounds in MgO-Al 2O3-Ti2O3 and molten iron at 1873 K

Hideki Ono; Keiji Nakajima; Toshio Ibuta; Tateo Usui

doi:10.2355/isijinternational.50.1955

Equilibrium relationship between the oxide compounds in MgO-Al ₂O₃-Ti₂O₃ and molten iron at 1873 K

Hideki Ono^*, Keiji Nakajima, Toshio Ibuta, Tateo Usui

^*Corresponding author for this work

Materials Design and Engineering

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

It is important to determine the equilibrium relationship between the oxide compounds in MgO-Al₂O₃-Ti₂O₃ and molten iron to avoid Al₂O₃ or MgO · Al ₂O₃ formation and for inclusion control. In this study, we investigated the formation conditions of MgTi₂O₄ in preference to MgAl₂O₄ at 1 873 K. The phase stability regions of MgTi₂O₄ and MgAl₂O₄ or Ti₂O₃ were determined at 1 873 K in MgO-Al ₂O₃-Ti₂O₃. At a low titanium content of less than 0.1 mass% and when [mass ppm Mg]=3, MgAl₂O₄ forms at more than [mass%Al]=0.08 and the region of MgAl₂O ₄ formation widens as the titanium content of the molten iron decreases. Accordingly, it is necessary to lower the Al content and to adjust the Ti content to an appropriate concentration range to form MgTi ₂O₄ instead of MgAl₂O₄.

Original language	English
Pages (from-to)	1955-1958
Number of pages	4
Journal	ISIJ International
Volume	50
Issue number	12
DOIs	https://doi.org/10.2355/isijinternational.50.1955
State	Published - 2010

Keywords

Deoxidation
Equilibrium
Inclusion
Steelmaking

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2355/isijinternational.50.1955

Cite this

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title = "Equilibrium relationship between the oxide compounds in MgO-Al 2O3-Ti2O3 and molten iron at 1873 K",

abstract = "It is important to determine the equilibrium relationship between the oxide compounds in MgO-Al2O3-Ti2O3 and molten iron to avoid Al2O3 or MgO · Al 2O3 formation and for inclusion control. In this study, we investigated the formation conditions of MgTi2O4 in preference to MgAl2O4 at 1 873 K. The phase stability regions of MgTi2O4 and MgAl2O4 or Ti2O3 were determined at 1 873 K in MgO-Al 2O3-Ti2O3. At a low titanium content of less than 0.1 mass% and when [mass ppm Mg]=3, MgAl2O4 forms at more than [mass%Al]=0.08 and the region of MgAl2O 4 formation widens as the titanium content of the molten iron decreases. Accordingly, it is necessary to lower the Al content and to adjust the Ti content to an appropriate concentration range to form MgTi 2O4 instead of MgAl2O4.",

keywords = "Deoxidation, Equilibrium, Inclusion, Steelmaking",

author = "Hideki Ono and Keiji Nakajima and Toshio Ibuta and Tateo Usui",

year = "2010",

doi = "10.2355/isijinternational.50.1955",

language = "英語",

volume = "50",

pages = "1955--1958",

journal = "ISIJ International",

issn = "0915-1559",

publisher = "Iron and Steel Institute of Japan",

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TY - JOUR

T1 - Equilibrium relationship between the oxide compounds in MgO-Al 2O3-Ti2O3 and molten iron at 1873 K

AU - Ono, Hideki

AU - Nakajima, Keiji

AU - Ibuta, Toshio

AU - Usui, Tateo

PY - 2010

Y1 - 2010

N2 - It is important to determine the equilibrium relationship between the oxide compounds in MgO-Al2O3-Ti2O3 and molten iron to avoid Al2O3 or MgO · Al 2O3 formation and for inclusion control. In this study, we investigated the formation conditions of MgTi2O4 in preference to MgAl2O4 at 1 873 K. The phase stability regions of MgTi2O4 and MgAl2O4 or Ti2O3 were determined at 1 873 K in MgO-Al 2O3-Ti2O3. At a low titanium content of less than 0.1 mass% and when [mass ppm Mg]=3, MgAl2O4 forms at more than [mass%Al]=0.08 and the region of MgAl2O 4 formation widens as the titanium content of the molten iron decreases. Accordingly, it is necessary to lower the Al content and to adjust the Ti content to an appropriate concentration range to form MgTi 2O4 instead of MgAl2O4.

AB - It is important to determine the equilibrium relationship between the oxide compounds in MgO-Al2O3-Ti2O3 and molten iron to avoid Al2O3 or MgO · Al 2O3 formation and for inclusion control. In this study, we investigated the formation conditions of MgTi2O4 in preference to MgAl2O4 at 1 873 K. The phase stability regions of MgTi2O4 and MgAl2O4 or Ti2O3 were determined at 1 873 K in MgO-Al 2O3-Ti2O3. At a low titanium content of less than 0.1 mass% and when [mass ppm Mg]=3, MgAl2O4 forms at more than [mass%Al]=0.08 and the region of MgAl2O 4 formation widens as the titanium content of the molten iron decreases. Accordingly, it is necessary to lower the Al content and to adjust the Ti content to an appropriate concentration range to form MgTi 2O4 instead of MgAl2O4.

KW - Deoxidation

KW - Equilibrium

KW - Inclusion

KW - Steelmaking

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U2 - 10.2355/isijinternational.50.1955

DO - 10.2355/isijinternational.50.1955

M3 - 学術論文

AN - SCOPUS:79952058758

SN - 0915-1559

VL - 50

SP - 1955

EP - 1958

JO - ISIJ International

JF - ISIJ International

IS - 12

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