Nucleation of Acicular Ferrite on Sulfide Inclusion during Rapid Solidification of Low Carbon Steel
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概要
- 論文の詳細を見る
A fine-grained microstructure yields the optimum combination of strength and toughness of steel. Refinement of the ferrite microstructure by formation of fine intra-granular acicular ferrite nucleated on inclusion has been caused wide interesting in weld metallurgy and other metallurgy fields. It is also important to refine the as-cast microstructure during strip casting and thin slab casting process in which the possibility of refining microstructure by rolling technology decreases. In present paper, the possibility to nucleate intra-granular acicular ferrite by sulfide inclusion in steel without special alloy elements during rapid solidification process has been investigated by optical microscopy, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The orientation of the acicular ferrite clusters are also investigated by Electron BackScattered Diffraction (EBSD) analysis. Oxide inclusion and sulfide inclusion are popular in the sample and only sulfide inclusions are observed effective to assistant acicular ferrite nucleation. The possible mechanisms of formation of acicular ferrite in present sample, those are manganese depleted zone and phosphorus rich zone around inclusion in matrix, are discussed in detail.
- 社団法人 日本鉄鋼協会の論文
- 2007-12-15
著者
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Yin Fuxing
National Inst. For Materials Sci.
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Nagai Kotobu
National Inst. Materials Sci. Tsukuba Jpn
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Nagai Kotobu
National Institute For Materials Science
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Kuwabara Mamoru
Dept. of Materials, Physics and Energy Eng. Nagoya Univ.
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KUWABARA Mamoru
Graduate School of Engineering, Nagoya University
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LIU Zhongzhu
Graduate School of Engineering, Nagoya University
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KOBAYASHI Yoshinao
National Institute for Materials Science
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Liu Zhongzhu
Graduate School Of Engineering Nagoya University
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Kobayashi Yuko
National Institute For Materials Science
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Kobayashi Yoshinao
Department Of Metallurgy And Ceramics Science Graduate School Of Science And Engineering Tokyo Insti
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Nagai K
National Institute For Materials Science
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Kuwabara Mamoru
Shougang Res. Inst. Of Technol.
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Kuwabara Mamoru
Graduate School Of Engineering Nagoya University
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Nagai Kotobu
National Inst. For Materials Sci.
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Liu Z
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Liu Zhongzhu
Graduate School Of Engineering Nagoya Univ.
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