In-situ Observation of Engulfment and Pushing of Nonmetallic Inclusions in Steel Melt by Advancing Melt/Solid Interface.
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- Shibata Hiroyuki
- Institute for Advanced Materials Processing, Tohoku University
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- Yin Hongbin
- Institute for Advanced Materials Processing, Tohoku University
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- Yoshinaga Satoru
- Graduate Student, Tohoku University
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- Emi Toshihiko
- Institute for Advanced Materials Processing, Tohoku University
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- Suzuki Mikio
- Institute for Advanced Materials Processing, Tohoku University
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Engulfment or pushing of inclusion particle by advancing melt/solid interface of steel has been investigated in-situ with a confocal scanning laser microscope. When the velocity of advancing interface exceeds a critical value Vc for a particle with radius R, solid alumina cluster particle or liquid silicate/aluminate globular particle in steel melt is found engulfed by the interface which extends in a convex way to form a bump toward the particle. At lower velocities or for smaller radii, the particles in both classes are pushed by the interface which does not form the bump. For solid alumina clusters, Vc (μm/s)=60/R (μm), whereas V 'c=23/R for the liquid globular particles, although Vc is not much different from V 'c at same R. The shape of the bump is reasonably reproduced by a two-dimensional FEM analysis of heat transfer from the melt across the particle to the interface. Reduced heat transfer caused by the intervening particle is considered responsible for the bump formation and resulting engulfment at Vc usually encountered in conventional casting process of steel.
収録刊行物
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- ISIJ International
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ISIJ International 38 (2), 149-156, 1998
一般社団法人 日本鉄鋼協会
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詳細情報
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- CRID
- 1390001206452775296
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- NII論文ID
- 10002458602
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- NII書誌ID
- AA10680712
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- COI
- 1:CAS:528:DyaK1cXitFakt7w%3D
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- ISSN
- 13475460
- 09151559
- http://id.crossref.org/issn/00211583
- http://id.crossref.org/issn/09151559
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可