| 研究生: |
王順和 Wang, Shuen-Ho |
|---|---|
| 論文名稱: |
微型金線及其鍍鉻處理後的機械性質之研究 The Study of Mechanical Property of Micrometric Golden Wire and Chrome Plating Golden Wire |
| 指導教授: |
周榮華
Chou, Jung-Hua |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 工程科學系碩士在職專班 Department of Engineering Science (on the job class) |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 80 |
| 中文關鍵詞: | 微型彈簧 、拉力試驗 、楊氏係數 、鍍鉻金線 、微型金線 、鍍鉻 |
| 外文關鍵詞: | young's mdulus, golden wire, chrome plating, micro-spring |
| 相關次數: | 點閱:65 下載:1 |
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本文用φ28μm、φ22μm及φ21μm的微型金線,在自行建造的小型拉力試驗工具上,分別作拉力試驗,以了解微型金線的楊氏係數(Young’s Modulus) 性質。其中φ28μm的微型金線,變換3種夾持長度作試驗,以探討微型金線在不同夾持長度時,其楊氏係數的變化。φ28μm及φ22μm的微型金線是同一家公司的產品,而φ21μm的金線是不同廠家的產品,比較不同廠家產品間,楊氏係數的變異,也經由統計方法歸納3 種微型金線的楊氏係數值。將3 種微型金線施以鍍鉻處理,得到不同厚度的鍍鉻層,再作拉力試驗,得到鍍鉻金線的等效楊氏係數(Eeff),分析鍍鉻金線的Eeff值與鍍鉻層厚的線性關係,也從分析中計算鍍鉻層的楊氏係數。以此間接方式計算的楊氏係數,則可提供未來作工程分析之用。
試驗結果求得φ28μm微型金線,其楊氏係數平圴值為 92,782 Mpa,標準差為 8,690 Mpa,變異係數(Coefficient of Variation,CV)為9.3%。φ22μm微型金線楊氏係數平圴值為 95,175 Mpa,標準差為 11,579 Mpa,CV為12.1%。及φ21μm的楊氏係數平圴值為 128,260 Mpa,標準差為 12,739 Mpa,CV為9.9%。而相同的微型金線在不同夾持長度時,其楊氏係數值無顯著的不同。不相同材質或不相同處理過程的微型金線,楊氏係數E值會隨之改變。φ28μm金線的鍍鉻金線,其等效楊氏係數(Eeff)與鍍鉻金線直徑(FNL_DIA)的線性關係為,Eeff(Mpa) = 268.23 + 3491.08 FNL_DIA(μm)。φ22μm金線的鍍鉻金線,其等效楊氏係數(Eeff)與鍍鉻金線直徑(FNL_DIA)的線性關係為,Eeff(Mpa) = 29547.0 + 3474.19 FNL_DIA(μm)。φ21μm金線的鍍鉻金線,其等效楊氏係數(Eeff)與鍍鉻金線直徑(FNL_DIA)的線性關係為,Eeff(Mpa) = 106599 +1718.9 FNL_DIA(μm)。而在直流電壓5~7伏特、溫度50~55℃、及200-275 g/LCrO3加 2-2.75g/L H2SO4 與水混合的電解液,在金線基材上電鍍,其電鍍層的楊氏係數可視為定值,其統計值約178,700Mpa 標準差 16,725Mpa,CV值為9.3%。
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