| 研究生: |
臧啟中 Tsang, Chi-Chung |
|---|---|
| 論文名稱: |
添加釩對鈦-鋁-鉬合金機械性質與鑄造性的影響 Effect of Vanadium Addition on Mechanical Properties and Castability of Ti-Al-Mo Alloys |
| 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: | 2010 |
| 畢業學年度: | 98 |
| 語文別: | 中文 |
| 論文頁數: | 144 |
| 中文關鍵詞: | 高爾夫球頭 、鈦合金 、鑄造性 、熱滾軋 |
| 外文關鍵詞: | alpha case, golf head, castability, hot rolling |
| 相關次數: | 點閱:94 下載:1 |
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現今高爾夫球頭設計上之重點,為了增加甜蜜點範圍而使得球頭大體積化。大體積球頭於擊球時,可容易擊中高爾夫球及得到較好的球頭慣性矩。而為了增加甜蜜點範圍,球頭材質設計必頇具備輕量及高強度等特性。而大部分的鈦合金跟不鏽鋼相較具有相同強度,但重量卻少了40%。
本實驗先研究鉍的添加對鈦合金X 合金系統的鑄造性影響。證明了鉍的添加降低Ti-Al-Mo 合金系統的鑄造性後,測量鈦合金X 及鈦合金Y 合金經由陶瓷殼模鑄造和熱滾軋兩種製程的機械性質,並以微硬度測量隨鑄造產生的α case 厚度,對照商用合金Ti-6Al-4V以找出最適合於在工業上使用之高爾夫球頭及打擊面上之新型合金。
實驗結果顯示, 鈦合金Y 經由鑄造和熱壓兩種製程,有最佳的拉伸性質,卻有最低的延伸率;鈦合金X 有與Ti-6Al-4V 相當的降伏強度且較高的拉伸強度,而延伸率也為三者中最高的10%。微硬度測試顯示陶瓷殼模鑄造產生的鈦合金Yα case 厚度較高,但在經熱滾軋後差異就不明顯。
Recently, the golf heads design focuses on magnifying their size in order to increase the sweet spot area. By this, it is easier for the golfer driving the ball farther and straighter. Less weight, low density, high strength, and high elasticity are the important conditions for golf head materials. Most titanium alloys possess the same strength as common grades of stainless steel, but are 40% less dense (the weight per volume area).
First, the effects on the castability of Ti-Al-Mo alloy of the bismuth(Bi) addition are examined. After getting the conclusion that the addition of bismuth reduce the castability of Ti-Al-Mo alloy, the mechanical properties of Ti-alloy X and Ti-alloy Y alloys fabricated by investment-casting and hot rolling were investigated individually, and the thicknesses of αcase of Ti-alloy which is produced as casting are examined as well.
Compare with commercial alloy Ti-6Al-4V, experimental esults of mechanical properties indicate that Ti-alloy X possesses equivalent yielding strength and higher ultimate tensile strength and ductility; Ti-alloy Y possesses the best tensile strength, but the lowest ductility.
Passing through investment-casting, Ti-alloy Y possesses heavierαcase; passing through hot rolling, the thicknesses of αcase have no difference between Ti-alloy X and Ti-alloy Y .
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