2014-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/697954摘要：本研究之目的為使用阻絕層配合雙層異質填料，開發紅外線異質硬銲TiNi SMA合金技術。開發異質金屬接合技術最大的關鍵點，即為減少(或控制)銲道內具脆性之介金屬化合物的生成。含鈦填料或TiNi SMA基材中的鈦元素，於硬銲製程中將會與鐵基(如：316L不銹鋼)或鎳鐵基合金(如：Incoloy 800合金)基材之Fe或Ni反應，並於銲道內生成具脆性的Fe-Ni-Ti介金屬相，進而影響銲點之接合強度，此點必需加以克服以獲得具韌性之接點。本人提出使用Cu為阻絕層之概念，隔絕鈦元素與316L不銹鋼或Incoloy 800合金接觸，以避免具脆性的Fe-Ni-Ti介金屬相生成於銲道或界面上。於316L不銹鋼或Incoloy 800合金與Cu阻絕層之間使用具韌性之BAg-8 (72Ag-28Cu, wt%)填料。此外，由於BAg-8填料無法潤濕TiNi SMA基材，故研究中使用一種銀基活性硬銲填料Cusil-ABA (63Ag-35.2Cu-1.75Ti, wt%)硬銲接合Cu阻絕層與TiNi SMA基材。此時銲點組合為TiNi SMA/Cusil-ABA/Cu/BAg-8/(316L/Incoloy 800)。期望使用以Cu箔為阻絕層形成之複合硬銲填料(Cusil-ABA/Cu/BAg-8)，開發TiNi SMA對於Fe基(如：316L不銹鋼)或Ni/Fe基(如：Incoloy 800合金)之紅外線異質金屬硬銲接合技術。<br> Abstract: The purpose of this investigation is developing infrared dissimilar brazing TiNi SMA technology using barrier layer with two different braze alloys. The key of developing dissimilar joining technology is to decease or control the formation of brittle intermetallic compound(s) in the weldment. Both Ti ingredient and Ti-based substrate react with Fe-base alloy, e.g., 316L stainless steel, or Ni/Fe-based alloy, e.g., Incoloy 800 alloy during brazing, and brittle Fe-Ni-Ti intermetallics are formed in the weldment resulting in deteriorating joint strength. It should be overcomed in order to obtain a robust joint. The application of Cu barrier layer has been proposed in order to isolate 316L stainless steel or Incoloy 800 alloy resulting in forming brittle Fe-Ni-Ti intermetallic phase at the interface or weldment. Ductile BAg-8 (72Ag-28Cu in wt%) braze alloy will be applied between the Cu barrier layer and 316L stainless steel/Incoloy 800 alloy. Because the BAg-8 filler cannot effectively wet TiNi substrate, an active Ag-based braze alloy, Cusil-ABA (63Ag-35.2Cu-1.75Ti in wt%), will be used to braze Cu barrier layer and TiNi SMA. The brazed joint is comprised of TiNi SMA/Cusil-ABA/Cu/BAg-8/(316L/Incoloy 800). It is expected that developing the technology of infrared dissimilar brazing TiNi SMA and Fe-based (e.g., 316L stainless steel) or Ni/Fe-based (e.g., Incoloy 800) alloys using the composite brazing filler (Cusil-ABA/Cu/BAg-8) will be achieved.TiNi形狀記憶合金紅外線硬銲異質接合阻絕層銀基填料脆性介金屬相TiNi shape memory alloysInfrared Brazing Dissimilar AlloysBarrier LayerAg-based fillersBrittle intermetallics