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- Taguchi Kenji
- Nagoya R&D Lab., Research & Development Laboratories, Nippon Steel Corporation
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- Takaya Shin
- Steelmaking Research Lab., Process Research Laboratories, Research & Development Laboratories, Nippon Steel Corporation
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- Numata Mitsuhiro
- Steelmaking Technology Div., Nippon Steel Corporation
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- Kato Toru
- Steelmaking Research Lab., Process Research Laboratories, Research & Development Laboratories, Nippon Steel Corporation.
抄録
<p>Improving the surface quality of the casting slab increases the productivity of steel. The slab surface sometimes has transverse cracks along a grain boundary when the slab is bent and/or unbent around the transformation temperature from the austenite to ferrite phases. In particular, for boron-containing steel, the defect is strongly influenced by the precipitation of BN on the grain boundary. In this study, the effect of deoxidizing elements, such as aluminum, calcium, and zirconium, on the hot ductility of boron-containing steel have been investigated fundamentally. The addition of zirconium or calcium improves the hot ductility of boron-containing steel by comparing with that of aluminum. An oxide containing calcium or zirconium acts as a more effective nucleus for BN precipitation than alumina, and the excess precipitation of BN on the grain boundary is suppressed. This improves the hot ductility of boron-containing steel in the region of single-phase austenite. Moreover, the hot ductility of Al+Zr-added steel is the best, even in the region of coexisting austenite and ferrite phases, because the precipitation of ferrite (α-Fe) on the grain boundary is suppressed compared to that of Al+Ca-added steel.</p>
収録刊行物
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- ISIJ International
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ISIJ International 60 (12), 2829-2837, 2020-12-15
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1391975831220498176
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- NII論文ID
- 130007956943
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- ISSN
- 13475460
- 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