Behavior of MgO·Al2O3 Based Inclusions in Alloy Steel During Refining Process

钢铁研究学报(英文版), 2010, 17(7): 1-6.

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China;Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla 65401, Missouri, USA

2.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China

3.Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla 65401, Missouri, USA

4.Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla 65401, Missouri, USA

5.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China

基金项目: China Postdoctoral Science Foundation(20080430020)

Behavior of MgO·Al2O3 Based Inclusions in Alloy Steel During Refining Process

YANG Shu-feng ^1, , LI Jing-she ^2, , ZHANG Li-feng ^3, , Kent Peaslee ^4, , WANG Zai-fei ^5,

2.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China

3.Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla 65401, Missouri, USA

4.Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla 65401, Missouri, USA

5.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China

Keywords： alloy steel

The transformation of MgO·Al2O3 based inclusions in alloy steel during refining has been studied by in-dustrial trials. Besides Factsage software is used to study the formation and modification of spinel inclusions in alloy steel using calcium treatment during refining process. The results show that the transformation sequence of inclu-sions is: MgO·Al2O3→CaO→Al2O3-MgO complex inclusions→MgO·Al2O3, and under present experimental con-dition, in order to avoid forming MgO·Al2O3 inclusions the content of dissolved Ca in the molten steel has to reach 1×10-6. Also the results show that when more calcium was added to molten steel, the content of Al2O3 and MgO will be lower. Besides, increasing the content of CaO in the inclusions will increase even if the content of SiO2 chan-ges little.

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Behavior of MgO·Al2O3 Based Inclusions in Alloy Steel During Refining Process

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