吳錫侃臺灣大學：機械工程學研究所吳居郇Wu, Chu-HsunChu-HsunWu2007-11-282018-06-282007-11-282018-06-282006http://ntur.lib.ntu.edu.tw//handle/246246/61270本研究分別使用銀基填料BAg-8、Ag-Cu-1.75Ti，和鈦基填料Ti-20Zr-20Cu-20Ni，對Ti-6Al-4V合金及具有不同表面鍍層之17-4PH不鏽鋼進行紅外線硬銲接合，期望藉由鍍層做為擴散阻隔層，阻擋填料與基材間的交互擴散以避免硬脆之介金屬相形成，得到最佳的剪力強度。實驗結果顯示，使用BAg-8填料與表面鍍鉻及鍍鎳之17-4PH不鏽鋼之接點可得到最佳的剪力強度；而使用Ag-Cu-1.75Ti填料與表面鍍鉻者剪力強度較前者低，但仍不錯。比較其顯微組織，發現均破斷於具脆性之Ti-Cu介金屬相，但前者之Ti-Cu相層較薄，破斷容易延伸進入較韌之富銀相。此外，Ti-20Zr-20Cu-20Ni填料對Ti-6Al-4V的動態潤濕性極佳，而對表面具有不同鍍層之17-4PH不鏽鋼之潤濕性以鍍鉻及鍍鎳者較佳，無鍍層者次之，鍍鉻者最差。比對17-4PH S.S./Ti-20Zr-20Cu-20Ni/Ti-6Al-4V紅外線硬銲接合所得之剪力測試數據與界面顯微組織，發現銲道中分佈著許多不同的相，並於界面處生成極脆之Ti-Fe介金屬相。且不鏽鋼上之鍍膜作為保護仍無法避免Ti-Fe相的生成，故其剪力強度不佳。In this study, Ti-6Al-4V and 17-4PH stainless steel (S.S.) are joined by infrared vacuum brazing using three different filler alloys. Those filler alloys are BAg-8, Ag-Cu-1.75Ti, and Ti-20Zr-20Cu-20Ni (wt%). Prior to infrared brazing, thin films of Cr/Ni (10μm/1μm) or Cr (10μm) are coated on the 17-4PH S.S. as diffusion barriers. The aim of introducing the diffusion barrier(s) is to prevent interdiffusion between two dissimilar alloys from forming intermetallics, so better bonding strength can be expected. Experimental results show that the best shear strength can be obtained from the Cr/Ni film coated on 17-4PH S.S. By SEM observation of crack propagation in shear-tested specimens, for both Cr/Ni and Cr surface coatings on 17-4PH S.S., they are mostly fractured at Ti-Cu intermetallics. The former ones have thinner Ti-Cu intermetallics layer, so that the crack can easier extend to the Ag-rich phase, which is tougher than the Ti-Cu phase. Dynamic wetting angle test of Ti-20Zr-20Cu-20Ni on different substrates shows that Ti-6Al-4V is completely wetted, and Cr/Ni surface coating on 17-4PH S.S. has better wettability than bald on 17-4PH S.S. By the shear test and SEM observation for the joints of Ti-6Al-4V/Ti-20Zr-20Cu-20Ni/17-4PH S.S., the bonding strength is quite low due to the formation of Ti-Fe intermetallics, even if there is Cr/Ni thin film coated on 17-4PH S.S. as a diffusion barrier.中文摘要……………………………………………………………………………..Ⅰ 英文摘要……………………………………………………………………………..Ⅱ 目錄…………………………………………………………………………………..Ⅲ 第一章 前言…………………………………………………………………………..1 第二章 文獻回顧……………………………………………………………………..5 2-1 Ti-6Al-4V合金與17-4PH不鏽鋼………………………………………5 2-1-1 Ti-6Al-4V之性質………………………………………………...5 2-1-2 17-4 PH不鏽鋼之性質……………………………………….....7 2-2 Ti-6Al-4V擴散接合不鏽鋼之研究…………………………………..10 2-2-1擴散阻隔層對接合之研究………………………………………12 2-3薄膜相關製程簡介……………………………………………………..15 2-4 潤濕角分析……………………………………………………………………...17 2-4-1 液體的表面張力………………………………………………………...17 2-4-2 潤濕角之分析…………………………………………………………...20 2-5 活性硬銲接合…………………………………………………………………...22 2-5-1 固相擴散法……………………………………………………………...23 2-5-2 液相暫態接合法………………………………………………………...24 2-6 紅外線接合製程………………………………………………………………...25 第三章 實驗方法……………………………………………………………………45 3-1 材料選擇與準備………………………………………………………………...45 3-1-1 Ti-6Al-4V基材…………………………………………………………...45 3-1-2 17-4PH不鏽鋼基材……………………………………………………...45 3-2活性硬銲填料之選用與準備……………………………………………………46 3-3 試片之表面處理………………………………………………………………...46 3-3-1 電鍍鉻…………………………………………………………………...46 3-3-2 磁控濺鍍鎳……………………………………………………………...47 3-3-3 α-step表面輪廓儀………………………………………………………49 3-4 紅外線加熱接合製程…………………………………………………………...49 3-4-1 實驗設備………………………………………………………………...49 3-4-2 硬銲接合實驗…………………………………………………………...50 3-4-3 動態潤濕測試…………………………………………………………...51 3-4-4 持溫時間之控制………………………………………………………...52 3-5 實驗之分析與分析儀器………………………………………………………..53 3-5-1 分析前之處理…………………………………………………………...53 3-5-2 光學顯微鏡與掃瞄式電子顯微鏡……………………………………...53 3-5-3 剪力試驗………………………………………………………………...54 第四章 使用銀基填料紅外線硬銲接合17-4PH不鏽鋼及Ti-6Al-4V...................65 4-1 界面組織………………………………………………………………………...65 4-2 17-4PH不鏽鋼鍍Cr膜後紅外線硬銲接合Ti-6Al-4V合金之界面顯微組織 分析…………………………………………………………………………….67 4-2-1 850℃×180sec接合界面之觀察………………………………………….68 4-2-2 850℃×300sec接合界面之觀察……………………………….…………70 4-2-3 875℃×180sec接合界面之觀察……………………………….…………71 4-2-4 875℃×300sec接合界面之觀察……………………………….…………72 4-3 17-4PH不鏽鋼鍍Cr膜後紅外線硬銲接合Ti-6Al-4V合金之剪力試片破斷 面分析及機械性質比較……………………………………………………….73 4-4 17-4PH不鏽鋼鍍Cr膜及Ni膜後紅外線硬銲接合Ti-6Al-4V合金界面顯微 組織觀察……………………………………………………………………….75 4-4-1 850℃×180sec接合界面之觀察………………………………………….76 4-4-2 850℃×300sec接合界面之觀察……………………………….…………77 4-4-3 875℃×180sec接合界面之觀察……………………………….…………78 4-4-4 875℃×300sec接合界面之觀察……………………………….…………79 4-5 17-4PH不鏽鋼鍍Cr膜及Ni膜後紅外線硬銲接合Ti-6Al-4V合金之試片破 斷面分析及機械性質比較…………………………………………………….80 第五章 使用鈦基填料紅外線硬銲接合17-4PH不鏽鋼及Ti-6Al-4V..................119 5-1 動態潤濕角分析……………………………………………………………….119 5-2 Ti-20Zr-20Cu-20Ni填料紅外線硬銲接合Ti-6Al-4V與17-4PH不鏽鋼……120 5-2-1 900℃×180sec紅外線硬銲條件下接合界面之觀察………………….121 5-2-2 930℃×180sec紅外線硬銲條件下接合界面之觀察………………….122 5-2-3 900℃×1800sec及930℃×1800sec紅外線硬銲接合之金相試片觀察………………………………………………………………………..123 5-2-4鍍Cr之17-4PH不鏽鋼及Ti-6Al-4V於930℃×1800sec紅外線硬銲 接合界面之觀察………………………………………………..............125 5-2-5表面鍍鉻及鍍鎳之17-4PH不鏽鋼與Ti-6Al-4V長時間硬銲接合界 面觀察…………………………………………………………………..126 5-3 17-4PH不鏽鋼與Ti-6Al-4V使用Ti-20Zr-20Cu- 20Ni填料紅外線硬銲接合 試片破斷面分析………………………………………………………………127 5-4 使用銀基填料與鈦基填料紅外線硬銲接合Ti-6Al-4V及17-4PH不鏽鋼之 比較……………………………………………………………………………128 5-4-1 紅外線硬銲接合之機械性質比較…………………………………….128 5-4-2使用銀基填料紅外線硬銲接合Ti-6Al-4V與17-4PH不鏽鋼破斷路 徑顯微組織比較………………………………………………………..131 第六章 結論………………………………………………………………………..159 參考文獻....................................................................................................................16323022278 bytesapplication/pdfen-US紅外線硬銲接合銀基填料鈦基填料動態潤濕擴散阻隔層Infrared brazingBAg-8 fillerAg-Cu-1.75Ti fillerTi-20Zr-20Cu-20Ni fillerCr and Ni diffusion barriersthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/61270/1/ntu-95-R93522728-1.pdf