(四川大学 制造科学与工程学院，成都 610065)
摘 要: 采用新型的Cu-Mn-Ni-Ag中温铜基钎料高频感应钎焊2Cr13不锈钢，并对钎料的工艺特性、钎焊接头的显微组织以及测试温度对钎焊接头力学性能的影响进行研究。结果表明:Cu-Mn-Ni-Ag钎料的熔点约为880 ℃，由富Ag相、Cu-Mn-Ni固溶体以及少量的Ni-Mn-Si化合物组成;钎料与2Cr13不锈钢产生良好的冶金结合，且钎焊接头组织致密;界面反应区的组织为Fe-Mn-Ni-Cr-Cu固溶体，钎缝区组织由富Ag相、Cu-Mn-Ni固溶体和少量的Ni-Mn-Si化合物组成;钎焊接头断裂于钎缝中间的富Ag相和CuMnNi固溶体上，为以剪切韧窝为主的韧性断裂，室温剪切强度最大可达369 MPa，在400 ℃、500 ℃和600 ℃下接头的剪切强度分别为251 MPa、208 MPa和84 MPa。
关键字: 铜基钎料;Cu-Mn-Ni-Ag;高频感应钎焊;2Cr13;显微组织;剪切强度
（School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China）
Abstract:The characteristic of Cu-Mn-Ni-Ag filler alloy and the microstructure and mechanical properties of the 2Cr13 stainless steel joint brazed by high frequency induction brazing using Cu-Mn-Ni-Ag filler alloy were studied. The results show that the melting point of the Cu-Mn-Ni-Ag filler alloy is 880 ℃ and it is composed of Ag-rich phase, Cu-Mn-Ni solid solution and a little Ni-Mn-Si compound; a layer of Fe-Mn-Ni-Cr-Cu solid solution forms at the interface between the filler alloy and base metal, and the brazing seam zone is composed of Ag-rich phase, Cu-Mn-Ni solid solution and a little Ni-Mn-Si compound. The brazing joints fails in the inside Cu-Mn-Ni solid solution and Ag-rich phase, and the fracture mode of the joints is mainly ductile dimple fracture, the best shear strength of the brazing joint at room temperature is 369 MPa, the high temperature shear strength of the brazing joints at 400 ℃, 500 ℃ and 600 ℃ are 251 MPa, 208 MPa and 84 MPa, respectively.
Key words: copper-based filler alloy; Cu-Mn-Ni-Ag; high frequency induction brazing; 2Cr13; microstructure; shear strength
