Effect of Li 2O addition on crystallization behavior of CaO-Al 2O 3-MgO based inclusions

Tomoko Sugimura; Tetsushi Deura; Koichi Sakamoto; Sohei Sukenaga; Noritaka Saito; Kunihiko Nakashima

doi:10.2355/isijinternational.51.1982

Effect of Li ₂O addition on crystallization behavior of CaO-Al ₂O ₃-MgO based inclusions

Tomoko Sugimura, Tetsushi Deura, Koichi Sakamoto, Sohei Sukenaga, Noritaka Saito, Kunihiko Nakashima

IMRAM - Division of Process and System Engineering

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

7 Citations (Scopus)

Abstract

The crystallization behavior of CaO-Al ₂O ₃-MgO oxide powder which is one of the major non-metallic inclusions in Al-killed steel was systematically examined in the present study. 33mass%CaO-62mass% Al ₂O ₃-5mass%MgO and 30mass%CaO-57mass% Al ₂O ₃-5mass%MgO-8mass%Li ₂O glass powders were heat-treated at 1 073-1 673 K for 8-512 s under air. CaO-Al ₂O ₃-MgO glass was found to be crystallized immediately after the heat treatments. Moreover, it was revealed that the addition of Li ₂O accelerated the crystallization of the glass powders, and controlled aggregation of crystal particles. Additionally, the indentation hardness of crystallized glasses after 512 s heat-treatments was investigated by using a nano-indenter. The addition of Li ₂O had the effect of lowering the hardness of samples, which indicates that Li ₂O would improve the deformation behavior of aluminate based inclusions.

Original language	English
Pages (from-to)	1982-1986
Number of pages	5
Journal	ISIJ International
Volume	51
Issue number	12
DOIs	https://doi.org/10.2355/isijinternational.51.1982
Publication status	Published - 2011

Keywords

Aluminate
Crystallization
Deformation
Hardness
TTT diagram

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title = "Effect of Li 2O addition on crystallization behavior of CaO-Al 2O 3-MgO based inclusions",

abstract = "The crystallization behavior of CaO-Al 2O 3-MgO oxide powder which is one of the major non-metallic inclusions in Al-killed steel was systematically examined in the present study. 33mass%CaO-62mass% Al 2O 3-5mass%MgO and 30mass%CaO-57mass% Al 2O 3-5mass%MgO-8mass%Li 2O glass powders were heat-treated at 1 073-1 673 K for 8-512 s under air. CaO-Al 2O 3-MgO glass was found to be crystallized immediately after the heat treatments. Moreover, it was revealed that the addition of Li 2O accelerated the crystallization of the glass powders, and controlled aggregation of crystal particles. Additionally, the indentation hardness of crystallized glasses after 512 s heat-treatments was investigated by using a nano-indenter. The addition of Li 2O had the effect of lowering the hardness of samples, which indicates that Li 2O would improve the deformation behavior of aluminate based inclusions.",

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author = "Tomoko Sugimura and Tetsushi Deura and Koichi Sakamoto and Sohei Sukenaga and Noritaka Saito and Kunihiko Nakashima",

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doi = "10.2355/isijinternational.51.1982",

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T1 - Effect of Li 2O addition on crystallization behavior of CaO-Al 2O 3-MgO based inclusions

AU - Sugimura, Tomoko

AU - Deura, Tetsushi

AU - Sakamoto, Koichi

AU - Sukenaga, Sohei

AU - Saito, Noritaka

AU - Nakashima, Kunihiko

PY - 2011

Y1 - 2011

N2 - The crystallization behavior of CaO-Al 2O 3-MgO oxide powder which is one of the major non-metallic inclusions in Al-killed steel was systematically examined in the present study. 33mass%CaO-62mass% Al 2O 3-5mass%MgO and 30mass%CaO-57mass% Al 2O 3-5mass%MgO-8mass%Li 2O glass powders were heat-treated at 1 073-1 673 K for 8-512 s under air. CaO-Al 2O 3-MgO glass was found to be crystallized immediately after the heat treatments. Moreover, it was revealed that the addition of Li 2O accelerated the crystallization of the glass powders, and controlled aggregation of crystal particles. Additionally, the indentation hardness of crystallized glasses after 512 s heat-treatments was investigated by using a nano-indenter. The addition of Li 2O had the effect of lowering the hardness of samples, which indicates that Li 2O would improve the deformation behavior of aluminate based inclusions.

AB - The crystallization behavior of CaO-Al 2O 3-MgO oxide powder which is one of the major non-metallic inclusions in Al-killed steel was systematically examined in the present study. 33mass%CaO-62mass% Al 2O 3-5mass%MgO and 30mass%CaO-57mass% Al 2O 3-5mass%MgO-8mass%Li 2O glass powders were heat-treated at 1 073-1 673 K for 8-512 s under air. CaO-Al 2O 3-MgO glass was found to be crystallized immediately after the heat treatments. Moreover, it was revealed that the addition of Li 2O accelerated the crystallization of the glass powders, and controlled aggregation of crystal particles. Additionally, the indentation hardness of crystallized glasses after 512 s heat-treatments was investigated by using a nano-indenter. The addition of Li 2O had the effect of lowering the hardness of samples, which indicates that Li 2O would improve the deformation behavior of aluminate based inclusions.

KW - Aluminate

KW - Crystallization

KW - Deformation

KW - Hardness

KW - TTT diagram

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JO - ISIJ International

JF - ISIJ International

IS - 12

ER -

Effect of Li ₂O addition on crystallization behavior of CaO-Al ₂O ₃-MgO based inclusions

Abstract

Keywords

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