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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳鈞 | |
dc.contributor.author | Shih-Chieh Lai | en |
dc.contributor.author | 賴世杰 | zh_TW |
dc.date.accessioned | 2021-06-15T01:48:06Z | - |
dc.date.available | 2014-07-22 | |
dc.date.copyright | 2009-07-22 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-07-06 | |
dc.identifier.citation | 1. 蘇程裕,周長彬,吳柏成,劉茂賢,真空硬銲的原理與應用,工業材料,120期,民國85年12月。
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Special Materials Corporation Briefing for DARPA, January 13, 1983. 31. William Boesch, “Superalloys, Supercomposites and Superceramics”, edited by John K. Tien, Thomas Caulfield, 1989, pp.1-3. 32. E. F. Bradley, “Superalloys: A Technical Guide”, ASM International, 1988, pp.1-6, 14-29. 33. William F. Smith, “Structure and Properties of Engineering Alloys”, McGraw-Hill, 1993, pp.498-507. 34. M. J. Donchie, “Introduction to Superalloys”, Superalloys Source Book, Ohio, ASM, 1984, pp.3-19. 35. C. H. White, “Nickel Base Alloys”, The Development of Gas Turbine Materials, edited by G. W. Meetham, 1981, pp.89-96. 36. Gary. L. Erickson, Cannon-Muskegon, “Properties and Selection: Irons, Steels, and High-Performance Alloys”, Metals Handbook, Vol.1, Tenth edition, ASM International, 1991, pp.982-985. 37. C. T. Sims and W. C. Hagel, “The Superalloys”, Wiley, New York, used by permission of Wiley & Sons, Inc., pp.37, 39, 332. 38. C. R. Brooks, “Heat Treatment, Structure and Properties of Noferous Alloys”, Metals Park, Ohio, ASM, 1982. 39. R. F. Decker and C. T. Sims, “The Metallurgy of Nickel-Base Alloy”, The Superalloys, Edited by C. T. Sims and W. C. Hagel, 1972, pp.33-77. 40. B. H. Kear, G. R. Leverant, and J. M. Oblak, Trans. ASM, Vol.62, 1969, pp.639. 41. 陳雅嵐,應用雷射於金屬堆積成型與鎳基超合金銲補之研究,民國92年,台灣大學碩士論文。 42. Sindo Kou, “Welding Metallurgy”, Wiley-Interscience Publication, 1987, pp.239-247, 297-306. 43. website: http://www.vacaero.com/Fluoride-Ion-Cleaning.html, Fluoride Ion Cleaning, “Dayton Process Technical Document”, VAC AERO international Inc.. 44. W. Miglietti, F. Blum, “Advantages of fluoride ion cleaning at sub-atmospheric pressure”, Engineering Failure Analysis, Vol.5, No.2, 1998, pp.149-169 45. David R. Gaskell, “Introduction to the thermodynamics of materials”, 4th ed., Taylor & Francis, 2003, pp.359. 46. M. T. Kim, S. Y. Chang, O. Y. Oh, J. B. Won, “Fluoride ion cleaning of gas turbine components using PTFE grease”, Surface and Coatings Technology, Vol.200, 2006, pp.6740-6748. 47. Thaddeus B. Massalski et. Al., “Binary Alloy Diagrams”, ASM International, Vol.1-3, 1990, pp.473, 508-510. 48. Y. H. Kim, I. H. Kim, K. T. Kim, S.Y. Shin, “Wide-gap Brazing of IN738 and the Bonding Strength using Ni-based Filler Metal powders”, Key Engineering Materials,Vols.345-346, 2007, pp.1449-1452. 49. 劉茂賢,吳清薰,真空熱處理及硬銲之原理與發展應用,工業材料雜誌,205期,93年1月,pp.168-173。 50. 蘇程裕,蘇嘉祥,許毅中,IN-738LC寬間隙活性擴散硬銲高溫氧化性研究,銲接與切割,第11卷第5期,2001年9月,pp.61-68。 51. 汪鼎凱,IN738及IN939鎳基超合金之真空硬銲研究,民國94年,台灣大學碩士論文。 52. P. Villars, A. Prince & H. Okamoto, “Handbook of Ternary Alloy Phase Diagrams”, Vol.5, 1995, pp.5529-5530. 53. K. Ohsasa, T. Shinmura, T. Narita, “Numerical Modeling of the Transient Liquid Phase Bonding Process of Ni Using Ni-B-Cr Ternary Filler Metal”, Journal of Phase Equilibria, Vol.20, No.3, 1999, pp.199-206. 54. R. G.. Iacocca, “The Effect of Thermal Cycle on the Microstructural Development of a Powder Metallurgy Superalloy Braze Material”, Metallurgical and Materials Transactions A, Vol.27A, January 1996, pp.145-153. 55. M. C. Chaturvedi, O. A. Ojo, N. L. Richards, “Diffusion Brazing of Cast Inconel 738 Superalloy”, AZojomo, Vol.1, September 2005, pp.1-12. 56. Smigelskas, A. D., and Kirkendall, E. O., Trans. AIME, Vol.171, 1947, pp.130. 57. C. Y. Su, W. C. Lih, C. P. Chou, H. C. Tsai, “Activated diffusion brazed repair for IN738 hot section components of gas turbines”, Journal of Materials Processing Technology, Vol.115, 2001, pp.326-332. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43300 | - |
dc.description.abstract | 鎳基超合金IN-738具有優異的高溫機械性質及抗蝕性,為火力發電廠氣渦輪機熱段組件之主要材料。葉片經長期運轉後,表面常有高溫腐蝕、高溫疲勞、潛變、異物的衝擊等損傷。由於此材料價格昂貴,為降低成本故有必要進行葉片之再生處理。IN-738合金為高鋁鈦的鎳基超合金,屬於銲接性差的材料,以傳統銲補製程易生成龜裂,故本研究採取真空硬銲製程進行修補。為了得到良好的硬銲效果,試片在硬銲前需以氟化物離子清洗(Fluoride ion cleaning,FIC)製程進行去除表面氧化物。硬銲製程使用IN-738/DF4B的混合粉末填料,以50/50、40/60、30/70、20/80重量比,進行真空硬銲製程及效果評估,並以50/50和20/80的填料,進行顯微組織觀察、EPMA成分1180℃之熱處理及高溫(850℃)拉伸試驗。
硬銲層的四種顯微組織由γ + γ' (Ni3(Al, Ti))基地、鉻硼化合物、細碎散佈碳化物及最後凝固的網狀共晶組織(BCr + BNi3 + (Ni))所組成。當試片經過FIC處理與硬銲後,硬銲層與母材間會出現明顯的界面,此界面是來自於FIC處理後殘留的氧化物和氮化物。在高溫(1180℃)進行熱處理時,硬銲層中的鉻硼化合物並不隨熱處理時間增長而分解,但共晶組織會隨熱處理時間增長而逐漸消失,其中硼元素擴散至近界面之母材,並增加鉻硼化合物在此區域之含量。在850℃高溫拉伸試驗中,IN-738母材抗拉強度為710 MPa;對硬銲層而言,50/50填料硬銲層之抗拉強度約為500 MPa,20/80填料硬銲層約為440 MPa,分別為母材強度的70 %與60 %。拉伸實驗結果顯示,提高低溶點填料(DF4B)於混合粉末中所佔比例,將生成更多硬脆的鉻硼化合物,使拉伸強度降低。 | zh_TW |
dc.description.abstract | IN-738 is a nickel-base superalloy, which has excellent mechanical properties and good corrosion resistance at elevated temperatures. It is one of the most widely used materials in hot sections of gas turbines in power generation plants. The sophisticated blade design, in order to increase efficiency, inevitably leads to a high blade cost. After long-time service, turbine blades may suffer from various damages and require refurbishment to reduce the operation cost. IN-738 alloy with high Al and Ti contents has poor weldability in traditional repair welding processes. In this study, a vacuum brazing process was used to simulate repair brazing of the alloy. In order to have better brazing results, the surface of IN-738 specimens was cleaned using a FIC (Fluoride ion cleaning) process to remove oxides prior to brazing. Mixed IN-738/DF4B powders (50/50, 40/60, 30/70 and 20/80 in weight percentages) were used as brazing filler metals in the process. Microstructural observations, EPMA analyses and 850℃ tensile tests were conducted on some brazed joints (50/50 and 20/80 powder mixtures). In addition, a high-temperature heat treatment at 1180℃ was carried out on the brazed specimens to study the changes in microstructures with time.
The microstructures in the brazed region consisted of γ' (Ni3(Al, Ti)), eutectic (BCr + BNi3 + (Ni)), chromium borides and dispersed carbides in the matrix of γ. After FIC and brazing, some residual oxides and nitrides in the interface between the brazed region and the base metal still could be observed. Microstructural observations indicated that chromium borides were intact; however, the eutectic areas were decomposed gradually in the brazed specimens subjected to a long-time heat treatment at 1180℃. Furthermore, the amount of chromium borides in the base metal near the interface was increased due to boron diffusion from the brazed region to the base metal. For tensile tests at 850℃, the ultimate tensile strengths (UTSs) of butt joints with 50/50 and 20/80 powder mixtures were about 500 and 440 MPa, i.e. 70 % and 60 % of the base metal (710 MPa), respectively. The lower UTS of the joint with 20/80 powder mixture could be attributed to a higher volume fraction of brittle chromium borides in the brazed region. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T01:48:06Z (GMT). No. of bitstreams: 1 ntu-98-R95527068-1.pdf: 22033850 bytes, checksum: fc16e87b57db567015f1f59074606c61 (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | 誌謝.....i
中文摘要.....ii 英文摘要.....iii 目錄.....v 圖目錄.....vii 表目錄.....xi 第一章 前言.....1 第二章 文獻回顧.....2 2.1 鎳基超合金的氧化與FIC處理.....2 2.1.1 氧化速率.....2 2.1.2 氧化動力學.....4 2.1.3 鎳基超合金的氧化行為.....4 2.1.4 氧化物利用FIC處理.....7 2.2 硬銲接合.....9 2.2.1 潤濕機構.....12 2.2.2 毛細現象.....14 2.2.3 硬銲的溫度和時間.....16 2.2.4 提高硬銲品質方法.....19 2.3 超合金.....20 2.3.1 鎳基超合金.....20 2.3.2 鎳基超合金強化機構.....27 第三章 實驗方法.....31 3.1 實驗材料及縫隙經過FIC處理試驗.....31 3.2 硬銲製程及FIC處理之硬銲.....31 3.3 縫隙修補的觀察.....35 3.4 SEM觀察及EPMA全定量分析.....35 3.5 高溫熱處理試驗.....37 3.6 拉伸試驗及破斷面觀察.....37 第四章 結果與討論.....39 4.1 縫隙經過FIC處理分析.....39 4.1.1 FIC處理效果評估.....39 4.1.2 FIC處理之EPMA分析.....50 4.2 不同填料對各種縫隙深度之硬銲分析.....56 4.2.1 硬銲填料評估.....56 4.2.2 顯微組織分析.....61 4.2.3 硬銲缺陷分析.....65 4.3 縫隙經過FIC處理與硬銲分析.....67 4.3.1 縫隙填補.....67 4.3.2 FIC與硬銲後之顯微組織分析.....74 4.3.3 硬銲縫隙深度的評估.....74 4.3.4 模擬縫隙氧化物無法去除的硬銲效果.....78 4.4 熱處理試驗結果.....83 4.4.1 表面觀察與組織之分析.....83 4.4.2 熱處理後產生的缺陷分析.....93 4.5 拉伸機械性質.....93 第五章 結論.....100 參考文獻.....101 | |
dc.language.iso | zh-TW | |
dc.title | IN-738超合金FIC處理與硬銲修補之研究 | zh_TW |
dc.title | FIC Treatment and Repair Brazing of IN-738 Superalloy | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 薛人愷,吳憲政 | |
dc.subject.keyword | 鎳基超合金IN-738,真空硬銲,氟化物離子清洗,熱處理,高溫強度, | zh_TW |
dc.subject.keyword | IN-738 superalloy,Vacuum brazing,Fluoride ion cleaning,Heat treatment,High-temperature strength, | en |
dc.relation.page | 105 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2009-07-07 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
顯示於系所單位: | 材料科學與工程學系 |
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