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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 潘永寧 | |
dc.contributor.author | Chieh-An Chen | en |
dc.contributor.author | 陳擷安 | zh_TW |
dc.date.accessioned | 2021-06-16T02:37:17Z | - |
dc.date.available | 2015-08-06 | |
dc.date.copyright | 2015-08-06 | |
dc.date.issued | 2015 | |
dc.date.submitted | 2015-07-24 | |
dc.identifier.citation | [1] 劉國雄等編著,工程材料科學,全華書局,民國83年。
[2] J. L. Jorstad, “The Hypereutectic Aluminum Silicon Alloy Used to Cast the Vega Engine Block,” Modern Casting, Vol. 60, 1971, pp.59-64. [3] J. E. Hatch, Aluminum Properties and Physical Metallurgy, ASM, 1984. [4] N. Tenekedjiev, D. Argo and J. E. Gruzleski, ”Sodium, Strontium and Phosphorus Effects in Hypereutectic Al-Si Alloys,” AFS Trans., Vol. 97, 1989, pp.127-136. [5] G. K. Sigworth, “Refinement of Hypereutectic Al-Si Alloy,” AFS Trans., Vol. 95, 1987, pp.303-314. [6] J. Sulzer, “How to Grain Refine High Silicon AluminumAlloys,” Modern Casting, Vol. 39, 1961, pp.38-43. [7] A. P. Bates and D. S. Calvert, “Refinement and Foundry Characteristics of Hypereutectic Aluminum-Silicon Alloys,” The British Foundryman, Vol. 59, 1966, pp.119-133. [8] M. Adachi, “Modification of Hypereutectic Al-Si System Casting Alloys,” J. of Japan Institute of Light Metals, Vol. 34, 1984, pp.430-436. [9] 邱弘興,“A390鋁合金之矽型態控制及其與機械性質之關係”,國科會85年研究計劃報告。 [10] F. Saeid and M. Saeid, “Effect of Material Structure Machining Characteristics of Hypereutectic Al-Si Alloy,” Mechanical-Advanced Manufacturing Technology, 2007, pp.4-15. [11] 葉秉洋,“鋁鈧二元合金與含鈧 7050 鋁合金之析出研究”, 大同大學碩士論文,2008,頁3-9、16-20。 [12] W. F. Smith, Structure and Properties of Engineering Alloys, 2nd Edition, 1993. [13] 黃振賢,機械材料,2009,pp.337-354。 [14] 吳漢宗、楊智超,材料手冊-非鐵金屬材料,1983,頁7、頁53-54。 [15] 溫宮瑤,“製程參數和除渣處理對Al-Si和A356合金品質之影響”, 2003,國立中央大學碩士論文。 [16] D. L. Zalensas, Aluminum Casting Technology, 2nd Edition, AFS, 1993. [17] J. E. Gruzleski and B. M. Closset, “The Treatment of Liquid Aluminum-Silicon Alloys,” AFS, Vol. 98, 1990, pp. 142-164. [18] 王建義,“鑄造用鋁合金”, 鑄工,No. 81. 民國79年,pp.38-44。 [19] 陳武宏編譯,“鑄鋁技術”,全華科技圖書,民國79年。 [20] J. E. Gruzleski and B. M. Closset, The Treatment of Liquid Aluminum-Silicon Alloys, The American Foundrymen’s Society, Inc. 1990. [21] L. Weihua and W. Ruyao, 'Microstructure and Mechanical Behavior of Nodular Silicon Al-Si Alloy,' Proceedings of the Fifth Asian Foundry Congress, AFC-5, 1999. [22] 余聲均,“微量元素添加對A356鋁合金機械性質影響之研究”,國立中央大學機械工程研究所碩士論文, 民國84年。 [23] L. Backerud, G. Chai and J. Tamminen, “Solidification Characteristics of Aluminum Alloys,” Vol. 2: Foundry Alloys, 1990, pp. 119-126. [24] 莊東漢,材料破損分析,2007,pp. 281-338。 [25] M. Elmadagli, T. Perry and A. T. Alpas, “A Parametric Study of the Relationship Between Microstructure and Wear Resistance of Al-Si Alloys,” Wear, 262, 2007, pp. 79-92, 2007. [26] 王盈琁,“添加合金元素對 Al-17%Si 合金高溫機械性質之影響”,大同大學碩士論文,2010。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/54032 | - |
dc.description.abstract | A390(Al-17Si-4.5Cu-0.5Mg)過共晶鋁矽合金在鑄造時,由於矽的比重(2.33g/cm3)較鋁(2.74g/cm3)低,因此在凝固過程中容易產生初晶矽上浮現像,使得同一鑄件在不同位置的機械性質不同。本研究利用此比重之差異,在凝固過程中對鑄件施加離心力,促使初晶矽偏析的現象更加顯著,而預期所生產之鑄件在局部位置能達到提升耐磨耗性之目的。本研究設計一旋轉裝置,A390鑄件之凝固過程在旋轉狀態下進行,而使初晶矽在鋁液內藉由離心力會往旋轉中心側(以下稱內側)集中。由分析各種不同轉速(50rpm、100rpm、150rpm與200rpm)下鑄件不同位置(內側、中央、外側)之顯微組織可以得知,初晶矽之偏析程度隨旋轉速度之增加而增高,且當轉速達到150rpm時,偏析程度達到飽和,而不再隨旋轉速度之增加而增高。故,本研究之離心鑄造實驗,其轉速均設定為150rpm。
又,本研究在固定旋轉速度150rpm之離心鑄造條件下,探討P之細化處理(針對初晶矽)與Sr之調質處理(針對共晶矽)對於鑄件之內側、中央及外側顯微組織的影響,並進一步探討上述之合金處理對於耐磨耗性之影響。結果顯示,A390+0.02%Sr鑄件內側之耐磨耗性最佳,其磨耗率較A390離心鑄造之鑄件降低約51%。另外,對於影響耐磨耗性之各參數對耐磨耗性做綜合迴歸分析,可以得知初晶矽的面積率越高、孔洞面積率越低、初晶矽顆粒尺寸越小及共晶矽調質效果越佳(範圍Class 2~ Class 5),則耐磨耗性越佳。 | zh_TW |
dc.description.abstract | While casting the A390 hypereutectic alloy, primary Si particles tend to float to the upper part of the casting due to the difference in specific weight between primary Si particles and the aluminum bulk liquid, the so-called gravity segregation. As a result, the mechanical properties in different parts of the casting vary. This research takes the advantage of the above-mentioned phenomenon of the primary silicon gravity segregation, and to enhance this segregation nature by employing centrifuging casting process to achieve better wear resistance in specific area of the castings. A centrifuging casting apparatus was constructed which allows the casting to be solidified under the centrifugal force. Under the centrifuging casting condition, the primary Si particles tend to move toward the rotational axis and aggregate at the inner portion of the castings. The experimental results indicate that the degree of primary silicon segregation toward the inner portion of the casting increases with increasing rotational speed, and reaches a plateau at 150 rpm.
On the other hand, the P refinement (for primary Si) and Sr modification (for eutectic Si) of A390 alloy were performed to examine the effects of either P refinement or Sr modification on the microstructures of the centrifuging castings at 150 rpm. Further, the relationship between the microstructure features obtained and wear resistance property was evaluated. The results indicate that the inner section of the A390+0.02%Sr centrifuging casting exhibits the best wear resistance performance, which is 51% better in wear rate while compared with the A390 centrifuging castings without any treatments. In addition, segregation analysis were performed and the findings conclude that the higher the % primary Si, the lower the % porosity, the smaller the primary Si particles size, and the higher the modification degree (form class 2 to class 5), the better the wear resistance property of the A390 alloy. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T02:37:17Z (GMT). No. of bitstreams: 1 ntu-104-R02522726-1.pdf: 4921951 bytes, checksum: e89dc3da3ff17bef86885839d1e03849 (MD5) Previous issue date: 2015 | en |
dc.description.tableofcontents | 第1章 前言 1
第2章 文獻探討 3 2.1 鋁合金簡介 3 2.1.1 鋁的特性 3 2.1.2 鋁合金的分類 3 2.1.3 合金元素對鋁合金的影響 4 2.2 鑄造用Al-Si合金系 5 2.3 A390鋁矽合金之顯微組織 6 2.3.1 初晶矽及其細化處理(Refinement) 6 2.3.2 共晶矽及其調質處理(Modification) 7 2.4 鋁合金氣孔形成機構 8 2.5 離心鑄造法 9 2.6 固體在鎔液中之移動速率 10 2.7 浮力原理-阿基米德定律 11 2.8 磨耗行為 12 2.8.1 磨耗概論 12 2.8.2 磨耗機制 13 2.8.3 影響磨耗行為之參數 15 第3章 研究方法與步驟 25 3.1 實驗目的 25 3.2 實驗流程 25 3.3 離心鑄造 25 3.3.1 離心鑄造之熔解與澆鑄 26 3.3.2 試片取樣 27 3.4 顯微組織觀察 27 3.4.1 初晶矽之面積率量測 27 3.4.2 孔洞之面積率量測 28 3.4.3 共晶矽調質效果量化 28 3.5 耐磨耗試驗 28 第4章 結果與討論 35 4.1 最佳離心轉速之決定 35 4.1.1 爐次A - 重力鑄造 35 4.1.2 爐次A - 離心鑄造(轉速:50rpm、100rpm、150rpm、200rpm) 35 4.1.3 重力在離心鑄造中之影響 36 4.2 細化及調質處理對於離心鑄造(150rpm)顯微組織之影響 37 4.2.1 爐次B-1 (A390+0.02%P) 37 4.2.2 爐次B-2 (A390+0.03%P) 37 4.2.3 爐次C-1 (A390+0.02%Sr) 38 4.2.4 爐次C-2 (A390+0.03%Sr) 38 4.2.5 爐次C-1R (A390+0.02%Sr) 39 4.2.6 小結 39 4.3 耐磨耗試驗 40 4.3.1 耐磨耗試驗結果 40 4.3.2 影響耐磨耗性之參數 40 4.3.3 各種不同參數對於A390之耐磨耗性之影響 41 第5章 結論 67 第6章 參考文獻 69 | |
dc.language.iso | zh-TW | |
dc.title | A390過共晶鋁矽合金之初晶矽偏析行為及耐磨耗性研究 | zh_TW |
dc.title | Research of primary Si segregation and abrasive performance of A390 hypereutectic Al-Si alloy | en |
dc.type | Thesis | |
dc.date.schoolyear | 103-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 楊智富,鄭偉鈞 | |
dc.subject.keyword | A390,離心鑄造,初晶矽偏析,細化處裡,共晶矽調質處理,耐磨耗性, | zh_TW |
dc.subject.keyword | A390,Centrifuging casting,Primary Si segregation,Refinement,Eutectic Si modification,Wear resistance property, | en |
dc.relation.page | 71 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2015-07-24 | |
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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