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Fe-C系亜共晶鋳鉄の初晶オーステナイトの核生成に及ぼすチタン及びニオブ添加の影響
http://hdl.handle.net/10112/5772
http://hdl.handle.net/10112/57728d5e82b0-9930-4d7b-ae83-54c51d63dc05
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KU-1100-19831014-00.pdf (3.1 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-12-15 | |||||
| タイトル | ||||||
| タイトル | Fe-C系亜共晶鋳鉄の初晶オーステナイトの核生成に及ぼすチタン及びニオブ添加の影響 | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| その他のタイトル | ||||||
| その他のタイトル | Effects of Ti and Nb on the Nucleation of Primary Austenite in Hypoeutectic Cast Iron of Fe-C System | |||||
| 著者 |
三宅, 秀和
× 三宅, 秀和× 岡田, 明× 尾崎, 良平 |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 27382 | |||||
| 姓名 | Miyake, Hidekazu | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 27383 | |||||
| 姓名 | Okada, Akira | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 27384 | |||||
| 姓名 | Ozaki, Ryohei | |||||
| 概要 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Experiments were conducted to observe how nucleation and growth of primary austenite (r) of Fe-C system cast iron change with the addition of titanium (Ti) and niobium (Nb), which form carbides by reacting with carbon (C) in the melt. The results obtained were discussed both from the structural observation of carbides and thermodynamics concerning the variation of the amount of carbides formed(TiCor NbC) and the elements dissolved in the melt during cooling. The atomic concentrations of Ti and Nb in the melt were nearly equal. The degree of undercooling before nucleation and the amount of nucleation (number of austenite grains) increase by increasing the Ti content. By increasing the Ti content the growth morphology of the primary r tends to become endogeneous, i.e. the nuclei formed over the whole area of the melt grow as equiaxed crystals. Nucleation and growth morphology are scarcely affected by the addition of Nb. Ti carbides are formed in sequence over the range from a high temperature, 1,500°C, to eutectic temperature. Most of the Nb carbides are formed at considerably higher temeprature than liquidus and are scarcely formed at temperature near that of nucleation of the primary austenite. Consequently the amount of C atoms taken away by Ti from the melt at the liquidus is extremely larger than that by Nb. It was concluded that the factor governing the nucleation of r is not the carbides or their amount formed before the nucleation of r, but the action of the elements forming carbides while taking C out of the melt. The newly formed surfaces of the carbides are the most effective sites for nucleation, since that part is most enriched in Fe. It was also concluded that the addition of Nb hardly promotes the nucleation, because it takes little C atoms out of the melt at the nucleation temperature, while the addition of Ti promotes the nucleation by taking a large quantity of C atoms out of the melt at the nucleation temperature of the primary r. |
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| 書誌情報 |
鋳物 巻 55, 号 8, p. 486-492, 発行日 1982-10-14 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00214396 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00016813 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 出版者 | ||||||
| 出版者 | 日本鋳造工学会 | |||||
