2008-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/677763摘要：本計劃以三年為期，發展製作新型低溫銀基真空硬銲填料，並進行紅外線真空硬銲不銹鋼之研究。其中新型低溫銀基真空硬銲填料以Ag-Cu-Sn三元合金為基礎，添加In以進一步降低填料熔點、添加Mn以改善填料對不銹鋼基材的潤濕性。至於不銹鋼基板則以304、422及440C等3種具代表性的不銹鋼為研究重點。計劃中的第一年是以真空電弧重熔的方式，配製各種不同化學組成之銀基硬銲填料(Ag-Cu-Sn-X)。先以高溫DSC量測各合金之熔化範圍，再利用紅外線動態潤溼角量測裝置，量測在各種可能的硬銲溫度下，上述填料分別對304、422及440C等3種不銹鋼的動態潤濕角量測。藉由這些初期測試，選擇3種較佳的填料組成供計劃中第二、三年使用。計劃中的第二年是研究以spin casting的方式製作上述三種填料之硬銲箔片，以提供計劃第三年使用。計劃中的第三年則是以上述三種填料箔片，進行紅外線真空硬銲304、422及440C等3種不銹鋼。研究中將針對上述硬銲接合試片之界面，進行定量微觀顯微組織分析、結構分析及剪力強度測試。最終希望能夠藉由本研究發展出數種新型低溫之銀基填料及其製作方式，並可大量應用於不銹鋼的真空硬銲製程，提供工業界參考與使用。<br> Abstract: The project is proposed in the period of three years to develop new low-temperature Ag-based braze alloys used in infrared vacuum brazing stainless steels. New low-temperature Ag-based braze alloys are based on the Ag-Cu-Sn ternary alloys with additions of In to depress melting points of braze alloys and Mn to increase wettability of braze alloys to stainless steels. Three representative stainless steel substrates, 304, 422 and 440C are focused in the research. In the first year, various Ag-based brazing fillers, Ag-Cu-Sn-X, with different chemical compositions are prepared by vacuum arc remelting method. Melting ranges of these alloys are measured by DSC analyses. Dynamic wetting angles of the above brazing fillers on 304, 422 and 440C stainless steel substrates at different possible brazing temperatures are performed via infrared dynamic wetting angle measurement infrastructure, respectively. With aid of these initial tests, three optimized filler metal compositions are chosen and used in the second and third year of the project. Brazing foils of the above three compositions are made by spin casting in the second year of the project, and they will be used in the third year of this project. In the third year, the project is concentrated on infrared vacuum brazing 304, 422 and 440C stainless steels using three Ag-based brazing foils. Interfacial microstructural observation, structural analysis and shear test of the brazed joint are performed in the study. Finally, the manufacture of several new low-temperature Ag-based braze alloys can be applied in vacuum brazing stainless steels for reference of domestic users.紅外線真空硬銲接合低溫銀基填料不銹鋼潤濕角量測界面顯微組織infrared vacuum brazinglow-temperature Ag-based braze alloysstainless steelswetting angle measurementinterfacial microstructure新型低溫銀基硬銲填料之開發及其應用於紅外線真空硬銲不銹鋼之研究