Behavior of Inclusions in Deoxidation Process of Molten Steel with in Situ Produced Mg Vapor
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概要
- 論文の詳細を見る
In the deoxidation process of molten steel with magnesium vapor produced in situ by aluminothermic reduction of magnesium oxide, the formed inclusions are usually small in size and of spherical shape. They tend not to aggregate and form cluster. The MgO content in the inclusions decreases, while the SiO2 content increases with the progress of experiment. Larger inclusions are removed by floating up with the rising bubbles more easily and the fine inclusions tend to remain in the melt. The oxygen concentrations originated from the inclusions can be reasonably explained from the experimental analysis ones.By use of the MgO porous immersion tube, deoxidation proceeds slowly at the initial stage, but it continues until the later stage of experiment, in contrast to that using the dense Al2O3 immersion tube. The formed inclusion number per unit area has a larger value than that with the dense Al2O3 tube. The number of inclusions also increases with increasing the initial oxygen concentration and dividing pellets charging into several portions. When the carrier gas flow rate is large, the number of inclusions tends to increase at the later stage of experiment due to the strong involvement of inclusions from the melt surface into the melt.In the present deoxidation process, it is considered that the rapid removal of larger inclusions by rising bubbles is beneficial to produce high cleanness steel, while the remaining fine inclusions is helpful for the grain refinement of steel during the solidification and phase transformation process.
- 社団法人 日本鉄鋼協会の論文
- 2007-05-15
著者
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Yang Jian
Department Of Cardiology Renmin Hospital Of Wuhan University
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Kuwabara Mamoru
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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YAMASAKI Tatsuhito
Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya Univ
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Yang Jian
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Yang Jian
Department Of Cardiology Daping Hospital The Third Military Medical University
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Yang Jian
Department Of Anesthesiology University Of Florida College Of Medicine
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Yamasaki Tatsuhito
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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