Quantitative Change of Nitrogen States in Melting Process for Permanent Mold Casting of Spheroidal Graphite Iron
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- Edane Kazuya
- Tsuchiyoshi Industry Co., Ltd.
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- Itofuji Haruki
- I2C Technical Institute Co., Ltd.
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- Matsugi Kazuhiro
- Graduate School of Advanced Science and Engineering, Hiroshima University
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- Choi Yong Bum
- Graduate School of Advanced Science and Engineering, Hiroshima University
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- Kambayashi Hitoshi
- Tsuchiyoshi Industry Co., Ltd.
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抄録
<p>In former studied, authors have already succeeded to get chill-free spheroidal graphite iron castings of φ35 × t5.4 mm indicator sample and automobile knuckle, using permanent mold in as-cast condition. The process of melting, molten treatment and pouring were theoretically designed considering both the reduction and increase of free nitrogen (NF), but it was not analytically proved by actual data yet. In this study, the amount of NF was analyzed using chill samples, which were taken at critical points like melting and molten treatment. As the results, the processes which reduce and increase NF were made clear. The increasing NF was occurred on the process during heating up, carbon addition and temperature slightly increased at near the TEC. The decreasing NF was occurred the process of alloy addition, during super-heating and temperature decreased at under the TEC. Furthermore, as the amount of molten metal decarburization increased, the variation of NF changed from adsorption to denitrification.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 64 (11), 2637-2642, 2023-11-01
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390297902461394816
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 033147827
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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
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可