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  1. NTU Theses and Dissertations Repository
  2. 工學院
  3. 機械工程學系
請用此 Handle URI 來引用此文件: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/49319
完整後設資料紀錄
DC 欄位值語言
dc.contributor.advisor陳永傳
dc.contributor.authorWen-An Chengen
dc.contributor.author鄭文安zh_TW
dc.date.accessioned2021-06-15T11:23:30Z-
dc.date.available2021-08-31
dc.date.copyright2016-08-31
dc.date.issued2016
dc.date.submitted2016-08-17
dc.identifier.citation參考文獻
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13. 大和久重雄(黃振賢譯),“熱間模具的熱疲勞龜裂與熱處理”,金屬熱處理,第66期,pp.68~73,2000
14. 朱致成,“淬火溫度及持溫時間對SKD61及其改良鋼種之機械性質的影響”,國立台灣大學機械工程研究所,碩士論文,2011
15. 高一之、林群新、陳建成、敖仲寧,“熱作工具鋼H10、H11、H12、H13 材料特性之比較”,金屬熱處理,第57期,pp.44~50,1998
16. 楊富程,“JIS SKD61改良鋼種之淬火前顯微組織對熱處理後之衝擊韌性的影響”,國立台灣大學機械工程研究所,碩士論文,2015
17. 黃振賢,金屬熱處理,文京圖書公司,pp.25~263,1992
18. Ya. E. Gol'dshtein, A. L. Starikova, “Effects of boron, molybdenum, and titanium on brittleness induced by tempering of structural steels” Metal Science and Heat Treatment, May 1963, Volume 5, Issue 5, pp 250–256
19. 顧佳羽,李歡,“高溫正火H13鋼鍛後組織的影響”,金屬熱處理,2012,37期,2012,pp.70~72
20. 張忠侃,“H13鋼碳化物球化過程及組織力學性能的研究”,昆明理工大學碩士論文,2010.
21. A. R. Rosenfield, G. T. Hahn, J. D. Embury, “Fracture of steels containing pearlite,” Metallurgical Transactions, 1972, Vol.3, pp.2797-2804.
22. K. Fukaura, Y. Yokoyama, D. Yokoi, N. Tsujii, K. Ono, “Fatigue of cold-work tool steels: effect of heat treatment and carbide morphology on fatigue crack formation, life, and fracture surface observations,” Metallurgical and materials transactions A, 2004, Vol.35, pp.1289-1300.
23. Flake C. Campbell, “Elements of Metallurgy and Engineering Alloys,” ASM International, 2008, pp.101-103
24. 黃振賢,金屬熱處理,文京圖書有限公司,第十八版,2000,pp.83-231.
25. 周健,馬黨參,劉寶石,康愛軍,李向陽,“H13鋼帶狀偏析演化規律研究”,鋼鐵研究學報,24期,2012,pp.47-52.
26. 霍曉陽,“影響H13 熱作模具鋼等向性的因素”,鋼鐵研究學報,Vol.20,2008,pp.47-50.
27. J. ZHOU, et al, “Influence of thermal homogenization treatment on structure and impact toughness of H13 ESR steel,” Journal of Iron and Steel Research International, 2009, Vol.16, pp.56-60.
28. J. Ekengren, “Estimating inclusion content in high performance steels,” Karlstad University Licentiate thesis, 2008.
29. H. V. Atkinson ,G. Shi, “Characterization of inclusions in clean steels: a review including the statistics of extremes methods,” Progress in Materials Science, 2003, Vol.48, pp.457-520.
30. F.G. Caballero, J. Chao, J. Cornide, C. García-Mateo, M.J. Santofimia, C. Capdevila
“Toughness deterioration in advanced high strength bainitic steels,” Materials Science and Engineering:A ,Vol 525 (2009) ,pp.87-95.
31. Takahashi, M. and H.K.D.H. Bhadeshia, “A Model for the Transition from Upper to Lower Bainite,” Materials Science and Technology, 1990. Vol. 6, pp. 592 -603.
32. Keehan, E., “ Microstructure and Properties of Novel High Strength Steel Weld Metals,” Welding in the World, 2005. Vol. 49(9/10): p. 19-31.
33. 鄒易康,“可控制冷速之熱處理設備及其在熱作工具鋼淬火之應用”國立台灣大學機械工程研究所,碩士論文,pp.21~25、55~56,2010
34. North American Die Casting Association, NADCA#207-2003, Premium and Superior Quality H13 steel and Heat treatment Acceptance Criteria for Pressure Die Casting Dies, River Grove, Illinois, USA, 2003.
35. 蔡錫堯,材料實驗,文京圖書公司,p.102,1987
36. E. Keehan, L. Karlsson, H. O. Andrén, H. K. D. H. Bhadeshia , “ Understanding Mechanical Properties of Novel High Strength Steel Weld Metals Through High-Resolution Microstructural Investigations”
dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/49319-
dc.description.abstract本研究使用JIS SKD61的規範鋼種以及改良鋼種作為實驗材料,並在固定的淬火溫度(1020 oC)以及持溫時間下(1hr),用不同的冷卻速率進行淬火,淬火時將其冷卻過程分為三個階段,分別為高溫區(1020oC~700oC)、中溫區(700oC~500oC)、低溫區(500oC~300oC),為了模擬現場淬火作業厚度大於300mm之模具中心實際的溫度變化歷程,依照各鋼種的CCT曲線圖推測出適當的淬火冷速作為初始條件,並以每次只改變其中一個溫度區間的淬火冷速的方式將冷速降為初始條件的2/3或1/2,淬火後的試片接著回火至相同的目標硬度HRC47±_1^(0.5),之後比較衝擊值,並以光學顯微鏡、SEM分析各試片的顯微組織與化學組成,探討各溫度區間冷速調降對衝擊韌性的影響。
研究結果顯示,各鋼種以低溫區冷速調降的條件淬火時最容易造成衝擊值下降,其次為高溫區冷速調降的條件,而以中溫區冷速調降的條件淬火後則對衝擊值影響不大。此外,原材組織中若有數量較多且粗大的網狀碳化物、碳化物顆粒、以及數量較多的巨觀非金屬夾雜物(20µm以上),將會導致含有這些組織的鋼種在以各條件淬火回火後,衝擊值會有明顯的下降。
zh_TW
dc.description.abstractThis study used the steel of JIS SKD61 and the improved steel as experimental materials. The quenching temperature (1020℃) and holding time (1hr) were fixed for quenching at different cooling rates. The cooling process was divided into three stage during quenching, which are the high temperature range (1020℃~700℃), moderate temperature range (700℃~500℃) and low temperature range (500℃~300℃). In order to simulate the actual temperature change in the mold center thicker than 300mm in the field quenching operation, the appropriate quenching cooling rate was reasoned from the CCT curve diagram of various steel grades as the initial condition. The quenching cooling rate of only one temperature interval was changed each time to reduce the cooling rate to 2/3 or 1/2 of initial condition. The quenched sample was tempered to the same target hardness HRC47±_1^(0.5) for impact test to compare the impact values. The microstructure and chemical composition of various samples were analyzed by optical microscope and SEM. The effect of reducing the temperature interval cooling rates on the impact toughness was discussed.
The findings showed that the impact value is most likely to decrease when various types of steel are quenched in the condition of low temperature range cooling rate scale down, and then in the condition of high temperature range cooling rate scale down. The quenching in the condition of moderate temperature range cooling rate scale down has slight effect on the impact value. In addition, if the raw material structure contains considerable and continuous net carbide, as well as considerable macroscopic nonmetallicinclusions (above 20μm), the impact value of the steel containing these structures decreases markedly after quench tempering under various conditions.
en
dc.description.provenanceMade available in DSpace on 2021-06-15T11:23:30Z (GMT). No. of bitstreams: 1
ntu-105-R03522729-1.pdf: 13630204 bytes, checksum: 66398fd6b5a55d786b8091e9b8699606 (MD5)
Previous issue date: 2016
en
dc.description.tableofcontents目 錄
誌 謝 I
摘 要 II
ABSTRACT III
目 錄 IV
圖目錄 VI
表目錄 XIII
第一章 緒 論 1
1.1前 言 1
1.2實驗動機與目的 1
第二章 文獻回顧 2
2.1 熱處理 2
2.1.1 淬火 2
2.1.2回火 3
2.1.3淬火條件與回火條件的選擇 4
2.2 添加合金元素對熱處理及機械性質的影響 4
2.3 原材顯微組織對機械性質的影響 5
2.3.1 合金碳化物的影響 5
2.3.2 巨觀偏析與微觀偏析 6
2.3.3 非金屬夾雜對韌性的影響 7
2.4 淬火後變韌鐵形貌對韌性的影響 7
第三章 實驗設備與方法 8
3.1 實驗規劃 8
3.2實驗設備 8
3.2.1 溫度量測及記錄設備 8
3.2.2 淬火設備 9
3.2.3 回火設備 9
3.2.4 元素分析以及顯微組織觀察所用儀器 9
3.3實驗方法 10
3.3.1 溫度校正 10
3.3.2 淬 火 10
3.3.3 回 火 10
3.3.4 維克氏微硬度測試 11
3.3.5 金相組織觀察 11
3.3.6 衝擊試驗 11
第四章 結果與討論 13
4.1各鋼種原材顯微組織觀察 13
4.2各鋼種淬火後硬度分析 14
4.3各鋼種淬火後顯微組織觀察 15
4.4各鋼種淬火回火後顯微組織觀察 21
4.5各鋼種淬火回火後之衝擊韌性 25
第五章 結 論 28
參考文獻 141
附錄 144
dc.language.isozh-TW
dc.title不同溫度區間的淬火冷速對熱作工具鋼衝擊韌性的影響zh_TW
dc.titleEffects of Different Quenching Cooling Rates at Different Temperature Ranges on Impact Toughness of Hot Work Tool Steelsen
dc.typeThesis
dc.date.schoolyear104-2
dc.description.degree碩士
dc.contributor.oralexamcommittee黃振賢,周挺正
dc.subject.keyword熱作工具鋼,淬火,機械性質,衝擊值,zh_TW
dc.subject.keywordHot work tool steel,Quenching,Mechanical properties,Impact value,en
dc.relation.page149
dc.identifier.doi10.6342/NTU201602680
dc.rights.note有償授權
dc.date.accepted2016-08-18
dc.contributor.author-college工學院zh_TW
dc.contributor.author-dept機械工程學研究所zh_TW
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