| 研究生: |
何翊魁 He, Yi-Kui |
|---|---|
| 論文名稱: |
淬火環境及熱機處理對Ti-7.5Mo合金結構及性質研究 Effects of quenching environment and thermomechanical treatment on structure and properties of Ti-7.5Mo alloy |
| 指導教授: |
陳瑾惠
Chern Lin, Jiin-Huey 朱建平 Ju, Chien-Ping |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 材料科學及工程學系 Department of Materials Science and Engineering |
| 論文出版年: | 2013 |
| 畢業學年度: | 101 |
| 語文別: | 中文 |
| 論文頁數: | 117 |
| 中文關鍵詞: | 鈦鉬合金 、熱機處理 、機械性質 |
| 外文關鍵詞: | Ti-Mo alloy, thermomechanical treatment, mechanical property |
| 相關次數: | 點閱:80 下載:1 |
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實驗一,對於固溶處理之Ti-7.5Mo合金經由不同淬火環境冷卻,主要目的為探討淬火液及淬火溫度對固溶處理的影響。實驗分成三個部分討論:第一部分為水冷W1~W3℃。第二部分為油冷O1~O4℃。第三部分為鹽浴S1~S3℃。
水冷處理條件下降伏強度533MPa、拉伸強度864MPa、延性34%、彈性模數80GPa,結晶結構為α"相。油冷處理條件下降伏強度為610MPa,拉伸強度為890MPa,延性32%,彈性模數85GPa,結晶結構為α"相。鹽浴處理條件下有降伏強度760MPa、拉伸強度927MPa、延性有21%,彈性模數89GPa,結晶結構為α"相。
實驗二,實驗目的為探討Ti-7.5Mo合金經由熱機處理對疲勞性質的影響,疲勞測試選用應變8%的疲勞測試,熱滾壓H%固溶處理S度T2分鐘W2℃水淬條件下,疲勞周期為66648次。熱滾壓H%固溶處理S度T2分鐘W2℃水淬後時效處理A1度T3分鐘條件下,疲勞周期為29878次。熱滾壓H%固溶處理S度T2分鐘W2℃水淬後冷滾壓C%條件下,疲勞周期為82622次。熱滾壓H%固溶處理S度T2分鐘W2℃水淬後冷滾壓C%再時效處理A2度T3分鐘,疲勞周期為51614次。
The first test is about solution treatment by different quenching environment for Ti-7.5Mo alloy, discussed the effect of quench media and the temperature of quench media.The first experiment divided into three parts discussed:Water quenching,and temperture is from W1 to W3℃.Oil quenching, and temperture is from O1 to O4℃. Salt bath quenching, and temperture is form S1 to S3℃.
In the condition of water quenching,yield strength is 533MPa,tensile strength is 864MPa,ductility is 34%,elastic modulus is 80GPa,and crystal structure is α" phase.In the condition of oil quenching,yield strength is 610MPa,tensile strength is 890MPa,ductility is 32%,elastic modulus is 85GPa, and crystal structure is α" phase. In the condition of salt bath quenching,yield strength is 760MPa,tensile strength is 927MPa,ductility is 21%,elastic modulus is 89GPa, and crystal structure is α" phase.
The second test is about fatigue life by different thermomechanical treatment, the fatigue test is strain-controlled fatigue tests used 8%.HRH% ST(S,T2)water quenching,fatigue cycle is 66,648 times.HRH% ST(S,T2) A(A1,T3),fatigue cycle is 29,878 times. HRH% ST(S,T2)CRC%, fatigue cycle is 82,622 times. HRH% ST(S,T2)CRC%A(A2,T3),fatigue cycle is 51,614 times.
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