紅外線硬銲異質接合 Ti-6Al-4V 及 Ti50Ni40Cu10 形狀記憶合金之研究

A Study of Infrared Vacuum Brazing Ti-6Al-4V Alloy and Ti50Ni40Cu10 Shape Memory Alloy

黃懷立(Huai-Li Huang)

指導教授 ： 吳錫侃

共同指導教授 ： 薛人愷(Ren-Kae Shiue)

國立臺灣大學/工學院/機械工程學研究所/碩士(2018年)

https://doi.org/10.6342/NTU201801537

摘要

本研究使用70Ti-15Cu-15Ni(wt.%) 鈦基填料、Cusil-ABA(Ag-Cu-1.75Ti wt.%)及Ticusil(Ag-Cu-4.5Ti wt.%) 銀基填料紅外線真空硬銲接合Ti50Ni40Cu10形狀記憶合金(SMA)與Ti-6Al-4V合金，探討在不同的參數下填料對基材之潤濕行為、顯微組織演化、銲點剪應力強度及破壞模式等。實驗結果發現Ti-15Cu-15Ni、Cusil-ABA及Ticusil在不同的持溫條件下對Ti-6Al-4V基材皆有不錯的潤濕性，而Ti-15Cu-15Ni對Ti50Ni40Cu10基材之潤濕性也類似。使用Cusil-ABA填料在870℃持溫5分鐘接合後，在基材介面分別生成一系列之Ti-Cu介金屬相，剪力破斷於Ti2Cu相或Ti3Cu4與TiCu2相之界面上，屬脆性破壞，剪應力值為112MPa；而在900℃持溫5分鐘接合後，其銲道中主要生成Ti2Ni相及Ti2Cu相，剪力破斷發生於Ti2CuTi2Ni相，也屬脆性破壞，剪應力值為131MPa。使用Ticusil填料於900℃持溫5分鐘接合後，銲道生成相以Ti2Ni相及Ti2Cu相為主，剪力破斷皆發生於Ti-rich相與Ti2CuTi2Ni相之間，屬脆性破壞，剪應力值為172MPa；而在950℃持溫1、3、5分鐘接合後，銲道中皆生成Ti2Ni相及Ti2Cu相，剪力試片在950℃持溫1分鐘者，其剪力破斷於Ti2CuTi2Ni相，屬脆性破壞，剪應力值為287MPa。使用Ti-15Cu-15Ni填料於920℃及935℃持溫3分鐘接合後，銲道中皆生成Ti2Cu及Ti2Ni相，且隨著持溫溫度的提高，Ti2Ni相逐漸增加，剪力破斷皆發生於Ti2NiTi2Cu相，也屬脆性破壞，剪應力值分別為92MPa及118MPa。紅外線硬銲接合時，Ti50Ni40Cu10 SMA中的Cu會擴散進入填料中造成液相線的下降，使在大部分的接合條件下填料會有溢流的現象。

關鍵字

紅外線硬銲接合 ； Ti50Ni40Cu10 SMA ； Ti-6Al-4V ； 鈦基填料 ； 銀基填料

並列摘要

Ti-based filler of 70Ti-15Cu-15Ni, and silver-based fillers of Cusil-ABA and Ticusil were used to vacuum infrared braze Ti50Ni40Cu10 (abbre. as Cu10) shape memory alloy(SMA) and Ti-6Al-4V alloy. The wettability of the fillers on the substrates, and the microstructure evolution and shear strength of brazed joints were investigated in detail. Experimental results indicate that all fillers perform very good wettability on Ti-6Al-4V substrate, and Ti-15Cu-15Ni filler also wets very good on Cu10 substrate. For dissimilar joining Cu10 SMA and Ti-6Al-4V alloy using Cusil-ABA filler, the joint brazed at 870°C5min is composed of a series of Ti-Cu intermetallics, and has the shear strength of 112MPa. When the brazing temperature increases, Ti2Cu and Ti2Ni intermetallics form and cross the brazed joint with the shear strength of 131MPa. For dissimilar joining Cu10 SMA and Ti-6Al-4V alloy using Ticusil filler, the joint brazed at 900°C5min is mainly composed of Ti2Cu and Ti2Ni intermetallics, and has the shear strength of 172MPa. When the brazing temperature increases to 950°C with brazing time being 1, 3 and 5 min., Ti2Ni and Ti2Cu intermetallics can be observed at the joints with the joint brazed at 950°C1min having the shear strength of 287MPa. For dissimilar joining Cu10 SMA and Ti-6Al-4V alloy using Ti-15Cu-15Ni filler, the joints brazed at 920°C3min and 935°C3min are both composed of Ti2Cu and Ti2Ni intermetallics, and have the shear strength of 92MPa and 182MPa, respectively, with Ti2Ni intermetallic becoming dominate as the brazing temperature increases.

並列關鍵字

Infrared brazing ； Ti50Ni40Cu10 SMA ； Ti-6Al-4V ； silver-based filler ； Ti-based filler

參考文獻

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