(哈爾濱工業(yè)大學 材料科學與工程學院 現(xiàn)代焊接生產(chǎn)技術國家重點實驗室，哈爾濱 150001)
摘 要: 采用電流輔助激光熔釬焊的方法對鈦/鋁異種合金的焊接特性進行研究。結果表明：激光功率對鈦/鋁異種合金接頭的力學性能及微觀組織有著明顯的影響；輔助電流可有效地降低焊接過程中所需的激光功率，促進焊絲及鋁合金母材的熔化，提高液態(tài)金屬對母材的潤濕鋪展能力，在一定程度上促進了界面反應。
關鍵字: 激光熔釬焊；輔助電流；鈦/鋁異種合金；界面反應
（State Key Laboratory of Advanced Welding Production Technology, School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China）
Abstract:The welding characteristic of Ti/Al dissimilar alloy by laser welding-brazing with assistant current was investigated. The experiment results indicate that laser power has a significant influence on mechanical properties and interfacial microstructures. The assistant current effectively decreases laser power required for joining Al alloy to Ti alloy, and significantly enhances the melting of filler wire and Al substrate as well as the wettability of liquid metal on Ti substrate. In addition, the interfacial reaction is improved by increasing assistant current to some degree.
Key words: laser welding-brazing; assistant current; Ti/Al dissimilar alloy; interfacial reaction
