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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 | Sheng-Hau Wang | en |
dc.contributor.author | 王聲豪 | zh_TW |
dc.date.accessioned | 2021-06-15T04:44:39Z | - |
dc.date.available | 2012-08-12 | |
dc.date.copyright | 2010-08-12 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-08-09 | |
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Hung, 'The Effects of Si Content and Matrix Structure on the Particle Erosion Behavior of Spheroidal Graphite Cast Irons,' Department of Materials Science and Engineering National Cheng Kung University Dissertation for Doctor of Philosophy 2003. [52] I. Finnie, et al., 'EROSION OF METALS BY SOLID PARTICLES,' Journal of Materials, vol. 2, pp. 682-&, 1967. [53] I. Finnie, et al., 'The influence of impingement angle on the erosion of ductile metals by angular abrasive particles,' Wear, vol. 152, pp. 91-98, 1992. [54] R. G. Wellman and C. Allen, 'The effects of angle of impact and material properties on the erosion rates of ceramics,' Wear, vol. 186-187, pp. 117-122, 1995. [55] D. Chen, et al., 'A model for erosion at normal impact,' Wear, vol. 205, pp. 32-39, 1997. [56] W. S. Dai, et al., 'SiO2 particle erosion of spheroidal graphite cast iron after surface remelting by the plasma transferred arc process,' Wear, vol. 248, pp. 201-210, 2001. [57] J. L. 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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45686 | - |
dc.description.abstract | 高鉻鑄鐵正被廣泛應用在耐磨耗及耐沖蝕之環境中,如:滾軋輥輪、礦業及水泥業磨球、管路輸送設備等。本研究針對高鉻鑄鐵探討化學組成與熱處理參數對於沖蝕磨耗及刮磨磨耗性質之影響。研究結果顯示,經淬火後之顯微組織主要包含共晶碳化物M7C3、麻田散鐵(內含M7C3及M23C6二次碳化物) 及大量之殘留沃斯田鐵;經回火熱處理後之顯微組織主要包含共晶碳化物M7C3、回火麻田散鐵(內含M7C3及M23C6二次碳化物) 及少量之殘留沃斯田鐵(取決於回火溫度)。結果顯示,不同化學組成(C, Cr and Mo)對於顯微組織雖有所影響,但對於耐沖蝕磨耗性質則無明顯的影響。另,進一步探討不同角度進行沖蝕磨耗之試驗結果顯示,淬火態在沖蝕角度45°及回火態在沖蝕角度60°出現最大沖蝕率及沖蝕深度。又,在相同沖蝕角度條件下,回火態之耐沖蝕磨耗性優於淬火態。此外,本研究選取一些特定高鉻鑄鐵進行一系列的回火熱處理(不同回火溫度),並以60°角之沖蝕試驗結果比較,得知沖蝕率及沖蝕深度均與合金之硬度成正相關,及硬度較高者,耐沖蝕磨耗性反而較差。然而,在刮磨磨耗測試中卻獲得相反之結果,此現象是由於在沖蝕過程中,材料移除的主因是裂縫成長,硬脆的較易產生裂縫,進而使材料移除,而在刮磨磨耗中材料移除的主因是切削,因此較硬的相能夠抵抗材料移除。 | zh_TW |
dc.description.abstract | High-Cr white cast irons have been used extensively in industries with both abrasive and erosive environments, such as mining and mineral processing (hammers, crushers, ball mills, pulverized rolls, etc.) and steel rolling process (rolling rolls) which require high wear resistance property. In this study, both erosion and pin-on-disc tests were performed to evaluate the effects of chemical composition and heat treatment condition on wear resistance property of high-Cr white cast irons. Microstructure observations show that alloys in quenched state consist of eutectic M7C3 carbides, martensite, M23C6 secondary carbides and a substantial amount of retained austenite. On the other hand, alloys in quenched and tempered state consist of eutectic M7C3 carbides, tempered martensite, M23C6 secondary carbides dispersed in tempered martensite and a small amount of retained austenite (depending upon tempering temperature). Erosion test results indicate that varying chemical composition (C, Cr and Mo contents), but maintaining at similar heat treatment conditions, exerts little influence on erosion property in terms of erosion rate and depth, although the microstructures were changed somewhat. Furthermore, erosion testing on selected alloys with different tempering temperatures concludes that the erosion property correlated positively with alloy hardness, that is, the resistance to erosion decreases with increasing alloy hardness. However, reverse results were obtained in the pin-on-disc testing. This can be explained by that facts the material removal is the main cause of crack growth when erosion, but when pin-on-disk test the main cause of material removal is cutting. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T04:44:39Z (GMT). No. of bitstreams: 1 ntu-99-R97522718-1.pdf: 8858690 bytes, checksum: dbe0e24477be4e5f488c30a51389e8b3 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 口試委員審定書 I
致謝 II 中文摘要 III Abstract IV 目錄 V 表目錄 VIII 圖目錄 IX 第一章緒論 1 第二章文獻回顧 3 2.1 高鉻鑄鐵 3 2.1.1前言 3 2.1.2合金設計 3 2.1.3碳化物種類 6 2.1.4凝固組織控制 7 2.1.5熱處理製程 8 2.2 磨耗機制 9 2.2.1前言 9 2.2.2刮磨磨耗(Abrasive wear) 10 2.2.3沖蝕磨耗(Erosion) 10 2.2.4黏著磨耗(adhesion) 12 2.2.5表面疲勞(surface fatigue) 13 第三章實驗方法與步驟 24 3.1 研究背景及研究目的 24 3.2 合金之化學組成 24 3.3 熱處理 24 3.4 顯微組織觀察與性質分析 25 3.4.1顯微組織觀察 25 3.4.2碳化物種類判定 25 3.4.3碳化物體積分率計算 25 3.4.4殘留沃斯田鐵量分析 26 3.4.5硬度測試 26 3.5 固體顆粒沖蝕磨耗試驗 26 3.5.1沖蝕試驗裝置 26 3.5.2沖蝕試驗參數 26 3.5.3沖蝕結果分析 27 3.5.4沖蝕破壞機制分析 27 3.6 Pin-on-Disk耐磨耗測試 27 第四章結果與討論 35 4.1熱處理對顯微組織之影響 35 4.2 碳化物種類判定 36 4.3合金成份對淬火後之顯微組織、硬度及沖蝕性之影響 37 4.3.1 淬火後對不同角度之沖蝕率與沖蝕深度之影響 37 4.3.2 固定Cr下,不同C含量之影響 37 4.3.3在共晶組成下,不同Cr/C比之影響 37 4.3.4 在亞共晶組成下,不同Cr/C比之影響 38 4.3.5 固定3%C與16%Cr下,Mo含量之影響 38 4.3.6 固定2.6%C與26%Cr下,Mo含量之影響 38 4.4合金成份對回火後之顯微組織、硬度及沖蝕性之影響 38 4.4.1 回火後對不同角度之沖蝕率與沖蝕深度之影響 38 4.4.2 固定Cr下,不同C含量之影響 39 4.4.3在共晶組成下,不同Cr/C比之影響 39 4.4.4 在亞共晶組成下,不同Cr/C比之影響 39 4.4.5 固定3%C與16%Cr下,Mo含量之影響 39 4.4.6 固定2.6%C與26%Cr下,Mo含量之影響 39 4.5熱處理對沖蝕率及沖蝕深度之影響 40 4.6系列回火處理對於硬度及沖蝕性之影響 40 4.7沖蝕表面與次表面破壞形貌探討 41 4.8 系列回火處理對於硬度及Pin-on-Disk之影響 42 第五章結論 77 參考文獻 78 附錄 82 | |
dc.language.iso | zh-TW | |
dc.title | 高鉻鑄鐵之耐磨耗性質探討 | zh_TW |
dc.title | Study on Wear Resistance Property of High-Cr Cast Iron | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 許正勳(Cheng-Hsun Hsu),楊榮顯 | |
dc.subject.keyword | 高鉻鑄鐵,熱處理,沖蝕磨耗, | zh_TW |
dc.subject.keyword | High-Cr cast iron,Heat treatment,Erosion, | en |
dc.relation.page | 82 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-09 | |
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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