瞬间液相扩散连接镁/镍/钛接头微观组织及力学性能研究  

Research on Microstructure and Mechanical Properties of TLP Diffusion Bonding Mg/Ni/Ti Joint

作　　者：陈建萍[1] 葛云[2] 

机构地区：[1]新疆交通职业技术学院机电工程学院,新疆乌鲁木齐831401 [2]石河子大学机电工程学院,新疆石河子832000

出　　处：《热加工工艺》2016年第21期246-248,251,共4页Hot Working Technology

基　　金：新疆维吾尔自治区高新技术研究发展计划资助项目(201511107)

摘　　要：以Ni箔为中间层,对镁合金AZ31B和钛合金Ti6Al4V进行瞬间液相扩散焊。结合能谱分析、X射线衍射谱、显微硬度测试和力学性能试验,研究了焊接过程中不同焊接温度（505-535℃）对镁/钛接头微观组织及力学性能的影响。结果表明当焊接温度为525℃、保温时间为20 min、焊接压力为0.2 MPa时,镁/钛接头达到最大剪切强度57MPa。此时,镁/钛接头界面形成Mg2Ni、Mg3Al Ni2等金属间化合物。在拉伸试验中,接头断裂发生在金属间化合物层。Transient liquid phase （TLP） diffusion bonding of AZ31B alloy and Ti6A14V alloy was prepared with Ni foilas intermediate layer. According to EDS, XRD, micro-hardness test and mechanical properties test, effects of weldingtemperature on microstructure and mechanical properties of Mg/Ti joint were studied in the range of 505 to 535℃. The resultsshow that the maximum shear strength of Mg/Tijoint is 57 MPa under the welding parameters of 525℃, 20 min and 0.2 MPa.Mg2Ni, Mg/lNi： and other intermetaUic compounds were formed in the inteffacial zone of Mg/Ti joint. In tensile test, thefracture of the joint occurred in the intermetallic compound layer.

关 键 词：镁合金 钛合金 瞬间液相扩散焊 微观组织 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]