AgCuMnNi钎料元素含量对钎焊接头组织及性能的影响  

Effect of element content of AgCuMnNi brazing filler metal on microstructure and properties of brazed joints

作　　者：唐威[1] Tang Wei(Shanxi Institute of Mechanical and Electrical Engineering,Changzhi 046011,Shanxi,China)

机构地区：[1]山西机电职业技术学院,山西长治046011

出　　处：《焊接》2023年第12期38-44,共7页Welding & Joining

基　　金：山西省教育科学规划课题项目(HLW-20194)。

摘　　要：设计了3种成分的AgCuMnNi钎料。3种钎料固液相线温度均处于750~792℃,钎料铸态组织主要由富Ag相与富Cu相组成。随着钎料中Ag含量的增加与Ni,Mn含量的减少,钎料铸态组织中富Ag相占比逐渐增加。在860℃,保温10 min工艺条件下,采用3种钎料真空钎焊YG6X/GH4169, Ag-3(AgCuNi4Mn8)钎料的钎焊接头平均抗拉强度为432.8 MPa,高于Ag-1(AgCuNi11.5Mn21.5)和Ag-2(AgCuNi4Mn11.5)钎料的钎焊接头平均抗拉强度。Ag-3钎料的钎焊接头微观组织中富Cu相与富Ag相分布均匀,而Ag-1与Ag-2中由于Mn含量较多,钎焊过程中生成了高Mn氧化区域,弱化了接头的力学性能。Three kinds of AgCuMnNi brazing filler metal were designed.Solidus-liquidus line temperature of the three kinds of brazing filler metal was 750~792℃,and as-cast microstructure of brazing filler metal was mainly composed of Ag-rich phase and Cu-rich phase.With the increase of Ag content and the decrease of Ni and Mn content,proportion of Ag-rich phase in as-cast microstructure of brazing filler metal increased gradually.Vacuum brazing of YG6X/GH4169 was performed with three kinds of brazing filler metal at 860℃for 10 min,and average tensile strength of Ag-3(AgCuNi4Mn8)brazed joints was 432.8 MPa,which was higher than that of both Ag-1(AgCuNi11.5Mn21.5)and Ag-2(AgCuNi4Mn11.5)brazed joints.Cu-rich phase and Ag-rich phase were evenly distributed in microstructure of Ag-3 brazed joints,while high Mn oxidation zone was formed in brazing process of Ag-1 and Ag-2 due to high Mn content,which weakened mechanical properties of brazed joints.

关 键 词：真空钎焊 钎料设计 硬质合金 高温合金 力学性能 

分 类 号：TG454[金属学及工艺—焊接]