(18.204.227.34) 您好!臺灣時間:2021/05/14 09:31
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:許中杰
研究生(外文):Chung-chieh Hsu
論文名稱:鐵-20錳-0.5碳合金之時效相變化研究
論文名稱(外文):A study of aging transformation in a Fe-20Mn-0.5C alloy
指導教授:鄭偉鈞
指導教授(外文):Wei-Chun Cheng
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:材料科技研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:109
中文關鍵詞:雪明碳體波來體
外文關鍵詞:cementitepearlite
相關次數:
  • 被引用被引用:12
  • 點閱點閱:110
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本研究為探討成分為鐵-20錳-0.5碳的高錳鋼,於低溫時效處理後所產生的析出相變化情形。合金的熱處理方式為:先經1100℃固溶處理後,再分別進行900至450℃之低溫時效處理。
經過1100℃固溶處理的合金,於沃斯田體晶粒內所生成的條狀麻田散體,可能是為HCP的結晶結構,或是為FCC基地的雙晶組織。經過固溶處理的合金再經低溫時效後,此條狀麻田散體繼續留存於沃斯田體晶粒中。
合金經800至650℃之時效處理後,於TEM的觀察發現於沃斯田體晶粒內有尺寸小於5 �慆的析出物,此析出物具有六方最密堆積的結晶結構,其晶格常數經鑑定為a=0.3202及c=0.5135 nm,而c/a=1.6037。此析出物未曾於鐵-錳-碳的二元或是三元系統被發現過,故應為首次發現的新析出相。
當合金的時效處理溫度低於600℃時,於沃斯田體晶界處有似波來體的組織產生,此似波來體的組織是由層狀的肥粒體及碳化物所組成。但是,此似波來體內之碳化物疑似同時有M23C6和M3C的兩種碳化物的存在。其中,M23C6碳化物具有FCC的結晶結構,其晶格常數為a=1.057 nm;而M3C為斜方晶系的結晶結構,是為雪明碳體相,其晶格常數為a=0.459,b=0.521及c=0.712 nm。由實驗分析,我們可以推論此似波來體的相變化應為γ → α + carbide的亞共析型反應。且此合金之似波來體的恆溫變態曲線的鼻部區域,應介於550至500℃之間。
We studied the phase transformations of a manganese steel in aging processes. The composition of the manganese steel is Fe-20 wt% Mn-0.5 wt% C. The alloy was undergone a solution heat treatment at 1100 oC and followed by the aging process at temperatures ranging from 900 to 450 oC.
After the heat treatment at 1100 oC, the alloy is composed of FCC grains and wicker-shape precipitates distributed within the FCC matrix. The wicker-shape precipitates are martensites which were identified as either HCP crystal structure or FCC twins. The martensite still existed in the FCC matrix after aging the alloy at low temperatures.
A new HCP precipitate formed in the FCC matrix after the alloy was aged at temperatures ranging from 800 oC to 650 oC. The size of the new precipitate is smaller than 5 �慆. The lattice constants of the HCP precipitate are a=0.320 and c=0.514 nm, where c/a =1.6037. This precipitate has not been found in Fe-Mn, Fe-C, or Fe-Mn-C systems, suggesting that it is the first observation in the alloy system.
When the aging temperature was below 600 oC, we observed a pearlite-like structure at the areas near the FCC grain boundaries. In TEM study, we found the carbides in the pearlite-like structure are composed of two kinds of carbides. One is M23C6 and the other M3C. Both of which have different composition as well as crystal structure. M23C6 has FCC structure with a= 1.057 nm, and M3C has an orthorhombic structure with a= 0.459, b=0.521 and c=0.712 nm. It is a hypoeutectoid transformation,γ → α + carbide, similar to that in common steels.
目 錄

第一章 前言.............................................1
第二章 文獻回顧.........................................9
2.1 析出型相變化..................................... 9
2.2 共析型相變化.................................... 10
2.3 亞共析型相變化...............................12
2.4 鐵基合金的碳化物............................... 15
2.5 鐵-錳-碳合金之麻田散體相變態................ 17
第三章 實驗方法...................................33
3.1 合金配製.................................33
3.2 合金的熱鍛及冷軋.........................34
3.3 熱處理條件...............................34
3.4 試片製作...................................35
3.5 實驗設備...................................38
3.6 流程圖........................................42
第四章 結果與討論......................................46
4.1 固溶處理和900℃時效.......................46
4.2 HCP析出物...............................48
4.3 M23C6和M3C碳化物......................50
4.4 未來研究方向.................................54
第五章 結論..........................................103
參考文獻................................................106
附錄...................................................109
1.T. Takahashi, W.A.Bessett, Science Mag.145, 483(1964)
2.Edgar C. Bain and Harold W. Paxton ”Alloy elements in steel”
3.D. William, J.R. Callister, Mat. Sci. and Eng. an Introduction, 5/e, 2000.
4.D.A. Porter and K.E. Easterling, Phase Transformations in Metals and Alloys, 2/e, 2001.
5.Zenji Nishiyama,”Martensitic Transformation”, pp.12, (1978).
6.劉禎祥、蔡全華,”鑄鋼實務”,中華民國鑄造學會,技術資料NO.169(1991)
7.劉嵩俊,“耐磨鋼鐵鑄造”,中華民國鑄造學會,技術資料NO.185(1995)
8.劉偉隆等編譯,物理冶金,第三版,全華科技圖書
9.游智鈞,“鐵-21錳-0.4碳合金之相變化研究”,國立台灣科技大 學,碩士論文(2007)
10.G. Krauss, Principles of Heat Treatment of Steel, ASM, pp.17-41, (1980).
11.E.C. Bain and H.W. Paxton, Alloying Elements in steel, 2nd ed., American Society for Metals, pp. 18 (1966).
12.D.A. Porter and K.E. Easterling, Phase Transformations in Metals and Alloys, 2/e, 263 , Nelson Thornes Ltd.(1992).
13.T.B. Massalski, Binary Alloy Phase Diagrams.
14.H.V. Lawrence, Elements of Materials Science and Engineering, 6th ed., Addison Wesley(1995).
15.S.A. Hackney and G.J. Shiflet, Acta metal., 35, 1007 (1987).
16.S.A. Hackney and G.J. Shiflet, Scripta Metallurgica, 19, pp.757-762 (1985).
17.A. Inoue, Y. Kojima, T. Minemura and T. Masumoto, Metall. Trans. A, 12 1245 (1981).
18.K.H. Hart, and W.K. Choo, Metall. Trans. A, 14 973 (1983).
19.W.K. Choo and K.H. Han, Metall. Trnans. A, 16 5 (1985).
20.K.H. Han, J.C. Yoon and W.K. Choo, Scripta Metall. 20 33 (1986).
21.K. Sato, K. Tagawa and Y. Inoue, Scripta Metall. 22 899 (1988).
22.K. Sato, K. Tagawa and Y. Inoue, Metall. Trans. A, 21 5 (1990).
23.H. Ishii, S. Ohkubo, S. Miura and T. Mohri, Materials Transactions, 44, 9 (2003).
24.J.B. Lupton, S. Murphy and J.H. Woodhead, Metall. Trans. A, 3 2923 (1972).
25.B. Weiss and R. Stickler, Metall. Trans. A, 3 851 (1972).
26.W.F. Smith, Structure and Properties of Engineering Alloys, 2/e, pp1-25 (1993).
27.Y.L. Lin and C.P. Chou, Scripta Metall., 27, pp. 67-70 (1992).
28.D.N. Shackleton and P.M. Kelly, Acta Metallurgica, 15, pp. 979-992 (1992).
29.薛凱云,“鐵-12錳-4鋁-0.5碳合金鋼之亞共析型反應研究”,國立台灣科技大學,碩士論文(2007)
30.P. Villars, A. Prince, and H. Okamoto, ” Handbook of ternary alloy phase diagrams”
31.P.M. Kelly,Acta met. 13 (1965) ,635
32.Pat L. mangonon, JR. nad Gareth Thomas ,Metallurgical Transactions,1,(1970),1577
33.Y. Tomota, M. Strum and J. W. Morris Or., Metall.Trans., 19A, 1563 (1988).
34.K. P. Staudhammer,L.E. Murr and S.S. Hecker,Acta Metall.,31, 267(1983)
35.Jung-Chul Kim, Don-Woon Han, Seung-Han Bail and Young-Kook Lee, Mat. Sci. and Eng.,A378 pp.323-327(2004)
36.汪建民,”材料分析”,中國材料科學學會(1998)。
37.B.D. Cullity, Elements of X-Ray Diffraction 2nd ed., Addison Wesley Publisher (1997).
38.David B. Williams and C. Barry Carter, “Transmission Electron Microscopy”, Plenum (1996).
39.陳力俊等,“材料電子顯微鏡學”,國科會精儀中心(1997)。
40.林東一,“鐵-21錳-0.4碳合金之麻田散體相變化研究”,國立台灣科技大學,碩士論文(2007)
41.U.V. Choudary and Y.A. Chang, CALPHAD. vol. 2, no. 2, pp. 169-185(1978).
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
無相關期刊
 
系統版面圖檔 系統版面圖檔