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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 潘永寧(Yung-Ning Pan) | |
dc.contributor.author | Cheng-Kung Lin | en |
dc.contributor.author | 林振昆 | zh_TW |
dc.date.accessioned | 2021-06-08T01:29:59Z | - |
dc.date.copyright | 2014-07-31 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-07-27 | |
dc.identifier.citation | [1] John Campbell, 'Castings,' Butterworths, 1992.
[2] N. Chvorinov, 'Theory of solidification of steel castings,' Giesserei, vol. 27, pp. 177-225, 1940. [3] S. I. Karsay, 'Ductile iron III Gating & Risering,' QIT – FER ET TITANE INC., 1982. [4] Yung-Ning Pan, 'Riser Design for Gray & Ductile Castings,' Casting material. [5] P. C. Gerhardt Jr., 'Computer applications gating and risering system design for Ductile iron castings,' Transactions of the American Foundrymen's Society, vol. 91, pp. 475-483, 1983. [6] Yung-Ning Pan, 'Heat treatment for Cast iron,' Casting material. [7] 黃振賢, '其他鋼料和鑄鐵的熱處理,' 金屬熱處理, 新文京出版社, pp. 466-470, 2002. [8] Ductile Iron Handbook. Des Plaines, IL: American Foundrymen's Society, Inc., 1993. [9] The Sorelmetal Book of Ductile Iron. Montreal, Canada: Rio Tinto Iron & Titanium, 2004. [10] S. I. Karsay and R. D. Schelleng, 'Heavy ductile iron castings composition effect on graphite structure,' Transactions of the American Foundrymen's Society, vol. 69, pp. 672-679, 1961. [11] J. Loper, C. R., A. Javaid, and E. N. Pan, 'Graphite morphology control in heavy section ductile iron,' presented at the Keith Millis Symposium on Ductile Cast Iron, Hilton Head Island, SC, USA, 1993. [12] R. R. Kust and C. R. Loper Jr., 'The production of heavy section ductile iron,' Transactions of the American Foundrymen's Society, vol. 76, pp. 540-546, 1968. [13] M. H. Mulazimoglu, Y. M. Yang, and J. F. Wallace, 'Solidification studies of spiking and large-small nodule formation in ductile iron produced by the in-the-mold process,' Transactions of the American Foundrymen's Society, vol. 93, pp. 627-650, 1985. [14] 蘇子銘, '耐低溫衝擊性能之厚壁球墨鑄鐵研發,' 碩士論文, 機械工程所, 國立台灣大學, 民國100年. [15] JIS Handbook. G 5502, pp. 943-944, 2000. [16] J. F. Wallace, P. Du, H. Q. Su, R. J. Warrick, and L. R. Jenkins, 'Influence of foundry variables on nodule count in ductile iron,' Transactions of the American Foundrymen's Society, vol. 95, pp. 813-834, 1985. [17] G. X. Sun and C. R. Loper Jr., 'Graphite flotation in cast iron,' Transactions of the American Foundrymen's Society, vol. 91, pp. 841-854, 1984. [18] P. K. Basutkare, C. R. Loper Jr., and C. L. Babu, 'Solidification of heavy section ductile iron casting,' Transactions of the American Foundrymen's Society, vol. 78, pp. 429-434, 1970. [19] H. Itofuji, K. Kawamura, N. Hosimoto, and H. Yamada, 'Production and evaluation of heavy-section ductile iron,' Transactions of the American Foundrymen's Society, vol. 98, pp. 585-595, 1990. [20] B. C. Liu, T. X. Li, Z. J. Rue, X. Y. Yang, E. Q. Huo, and C. R. Loper Jr., 'The role of antimony in heavy-section ductile iron,' Transactions of the American Foundrymen's Society, vol. 98, pp. 753-757, 1990. [21] E. N. Pan, C. N. Lin, and H. S. Chiou, 'Effects of Pb and solidification conditions on the graphite structure of heavy section ductile cast irons,' Transactions of the American Foundrymen's Society, vol. 103, pp. 265-273, 1995. [22] E. N. Pan and C. Y. Chen, 'Effects of Bi and Sb on the graphite structure of heavy section ductile cast irons,' Transactions of the American Foundrymen's Society, vol. 104, pp. 845-858, 1996. [23] G. S. Cho, K. H. Choe, K. W. Lee, and A. Ikenaga, 'Effects of alloying elements on the microstructures and mechanical properties of heavy section ductile cast iron,' Journal of Materials Science and Technology, vol. 23, pp. 97-101, 2007. [24] M. Gagne and C. Labrecque, 'Microstructural defects in heavy section ductile iron castings: formation and effect on properties,' Transactions of the American Foundry Society, vol. 117, pp. 561-571, 2009. [25] P. Larranaga, I. Asenjo, and J. Sertucha, 'Effect of antimony and cerium on the formation of chunky graphite during solidification of heavy-section castings of near-eutectic spheroidal graphite irons,' Metallurgical and Materials Transactions. Part A, Physical Metallurgy and Materials Science, vol. 40A, pp. 654-661, 2009. [26] P. S. Graham, 'The areas of consideration in the manufacture of heavy-section ductile iron,' Transactions of the American Foundrymen's Society, vol. 90, pp. 313-321, 1982. [27] K. L. Hayrynen, D. J. Moore, and K. B. Rundman, 'Heavy section ductile iron: production and microsegregation,' Transactions of the American Foundrymen's Society, vol. 96, pp. 619-632, 1988. [28] H. Roedter and M. Gagne, 'Ductile iron for heavy section wind mill castings: A european experience,' presented at the Keith Millis Symposium on Ductile Cast Iron, Hilton Head Island, SC, USA, 2003. [29] ASTM A536, 'Standard Specification for Ductile Iron Castings,' ASTM International. [30] ASTM E8/E8M, 'Standard Test Methods for Tension Testing of Metallic Materials,' ASTM International. [31] ASTM E10, 'Standard Test Method for Brinell Hardness of Metallic Materials,' ASTM International. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/18839 | - |
dc.description.abstract | 球墨鑄鐵兼具強度及延性之特性,在工業上已有相當廣泛之應用,鑑於對鑄件品質之高度要求,不僅機械性質必須符合規格要求,且收縮缺陷必須極力避免。本研究係針對高強度厚壁球墨鑄鐵件(120mm之立方體),探討最佳冒口設計,所採用之冒口型式為頂冒口。在合金設計上,C、Si含量分別設定在3.6%及2.4%,又,為得到全波來鐵基地而添加了Fe-Mn及純Cu。
研究結果顯示,在澆注溫度為1400oC時,無保溫套之最佳冒口設計為:冒口直徑=70mm,冒口高度=70mm,冒口頸直徑=40mm,冒口頸高度=20mm。若採用保溫型保溫套或發熱型保溫套,其最佳冒口設計均為:冒口直徑=54mm,冒口高度=54mm,冒口頸直徑=40mm,冒口頸高度=20mm。由此可知,採用保溫型保溫套或發熱型保溫套之冒口體積,可較無保溫套之冒口體積縮小達到55%。 研究結果亦顯示,為符合FCD-800-2之合金規格,最佳合金設計為:Mn:0.2%、Cu:1.0%。在成份及顯微組織(球化率、石墨數目、波來鐵比例)皆達到標準之前提下,鑄態下之機械性質已幾乎達到規格要求:抗拉強度、降伏強度、伸長率及硬度分別為797MPa、500MPa、6.3%及290HB。若再施以最佳熱處理程序:890oC/1hr/OQ/600oC/1hr/furnace cooling to RT,則抗拉強度、降伏強度及伸長率分別為864MPa、720MPa及4.5%,均符合規格要求。 | zh_TW |
dc.description.abstract | Ductile cast irons have been widely applied in the industry due to their high strength and ductility. In view of the stringent quality requirements for the castings, not only the mechanical properties must meet the specification, but also the shrinkage defects should be prevented. In this study a high strength grade (FCD-800-2) ductile cast iron was chosen as the target alloy, and a heavy section ductile iron casting (120mm cube) was selected for the study of the optimal riser design.
Regarding the riser design, top risers were employed in this study. The experimental results indicate that under the condition of 1400oC pouring temperature, the optimal riser design obtained is:Dr=70mm, Hr=70mm, Dn=40mm, Hn=20mm. On the other hand, as the insulated riser sleeve or exothermic riser sleeve was used, the optimal riser designs for both types are:Dr=54mm, Hr=54mm, Dn=40mm, Hn=20mm. Accordingly, a reduction of riser size (volume) as high as 55% can be obtained when insulated or exothermic riser sleeves were employed. Regarding the alloy design and heat treatment that are required to meet the FCD-800-2 specification, the C and Si contents are set at 3.6% and 2.4%, respectively. Moreover, in order to attain a merely fully pearlitic matrix, Fe-Mn alloy and copper (Cu) were added. 25mm-Y blocks were cast for tensile specimens. The experimental results show that the optimal alloy design is 0.2%Mn, 1.0%Cu, with the as-cast mechanical properties of 797MPa, 500MPa, 6.3% and 290HB for tensile strength, yield strength, elongation and hardness, respectively. Furthermore, as the optimal heat treatment condition of 890oC-1hr/oil quench at 600oC-1hr/furnace cooling to RT was conducted on the specimens, the following mechanical properties: 864MPa in tensile strength, 720MPa in yield strength and 4.5% in elongation can be obtained, all meeting the FCD-800-2 specification. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T01:29:59Z (GMT). No. of bitstreams: 1 ntu-103-R01522743-1.pdf: 30568711 bytes, checksum: aee8532eab89b93c092e936912a28537 (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iii CONTENTS v LIST OF FIGURES ix LIST OF TABLES xiv 第1章 緒論 1 1.1 前言 1 1.2 研究動機與目的 2 第2章 文獻探討 3 2.1 鑄鋼及鑄鐵之體積變化 3 2.1.1 鑄鋼之體積變化 3 2.1.2 鑄鐵之體積變化 3 2.2 冒口設計 4 2.2.1 冒口設計之基本概念 4 2.2.2 直接應用式冒口設計 4 2.3 石墨鑄鐵之熱處理 6 2.3.1 熱處理之觀念、目的與步驟 6 2.3.2 球墨鑄鐵顯微組織對機械性質之影響 7 2.3.3 淬火及回火 7 2.4 製程參數對球墨鑄鐵顯微組織之影響 8 2.4.1 球化處理 8 2.4.2 接種處理 9 2.4.3 出爐溫度、澆注溫度與澆注時間之影響 9 2.5 化學成份對厚壁球墨鑄鐵件之影響 10 2.5.1 碳、矽含量與碳當量之影響 10 2.5.2 其它合金元素之影響 11 第3章 研究方法 16 3.1 探討最佳冒口設計 16 3.1.1 實驗設計 16 3.1.2 實驗流程 17 3.1.3 合金設計 18 3.1.4 鑄造流程 18 3.1.4.1 模型製作與造模材料 18 3.1.4.2 配料與熔解方法 18 3.1.4.3 球化、接種與二次(瞬間)接種處理 19 3.1.5 冒口系統之尺寸設計 19 3.1.5.1 冒口尺寸之設計依據 19 3.1.5.2 冒口頸尺寸之設計依據 19 3.1.5.3 A系列與B系列之尺寸設計 20 3.1.5.4 保溫套 20 3.1.6 體積收縮量之量測方法 20 3.1.7 模擬分析 21 3.2 探討最佳熱處理程序 23 3.2.1 實驗設計 23 3.2.2 實驗流程 24 3.2.3 合金設計 25 3.2.4 鑄造流程 25 3.2.4.1 模型製作與造模材料 25 3.2.4.2 配料與熔解方法 25 3.2.4.3 球化、接種與二次(瞬間)接種處理 25 3.2.5 熱處理程序 26 3.2.6 機械性質試驗 26 3.2.6.1 拉伸試驗 26 3.2.6.2 硬度試驗 26 3.2.7 金相製備與顯微組織分析 26 第4章 結果與討論 40 4.1 探討最佳冒口設計 40 4.1.1 鑄件(含冒口系統)之剖面觀察 40 4.1.1.1 A系列與B系列之鑄件(含冒口系統)之剖面觀察 40 4.1.1.2 C系列與D系列之尺寸設計 41 4.1.1.3 C系列與D系列之鑄件(含冒口系統)之剖面觀察 41 4.1.1.4 E系列之尺寸設計 42 4.1.1.5 E系列之鑄件(含冒口系統)之剖面觀察 43 4.1.1.6 F系列與G系列之尺寸設計 43 4.1.1.7 F系列與G系列之鑄件(含冒口系統)之剖面觀察 44 4.1.1.8 保溫套之冒口體積縮小率 45 4.1.1.9 H系列之尺寸設計 45 4.1.1.10 H系列之鑄件(含冒口系統)之剖面觀察 45 4.1.1.11 I系列之尺寸設計 46 4.1.1.12 I系列之鑄件(含冒口系統)之剖面觀察 46 4.1.2 體積收縮量之分析 47 4.1.2.1 冒口頸直徑之影響(A~D系列) 47 4.1.2.2 冒口直徑之影響(E~G系列) 48 4.1.2.3 冒口頸直徑之影響(H系列) 48 4.1.2.4 冒口頸高度之影響(I系列) 49 4.1.2.5 澆注溫度之影響 49 4.1.3 模擬結果之探討 50 4.2 探討最佳熱處理程序 51 4.2.1 M爐次之探討 51 4.2.2 N爐次之探討 52 4.2.3 O爐次之探討 53 第5章 結論 128 5.1 最佳冒口設計 128 5.2 最佳熱處理程序 129 REFERENCES 130 | |
dc.language.iso | zh-TW | |
dc.title | 高強度厚壁球墨鑄鐵冒口設計方法之探討 | zh_TW |
dc.title | Study of Riser Design for High Strength and Heavy Section Ductile Iron | en |
dc.type | Thesis | |
dc.date.schoolyear | 102-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 楊榮顯,邱弘興 | |
dc.subject.keyword | 高強度球墨鑄鐵,冒口設計,冒口保溫套,充填及凝固模擬,淬火及回火,機械性質, | zh_TW |
dc.subject.keyword | High strength ductile iron,Riser design,Computer simulation,Quenching and tempering,Mechanical properties, | en |
dc.relation.page | 133 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2014-07-28 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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