Ti3Al与316L不锈钢的真空钎焊工艺  

Vacuum brazing of Ti3Al and 316L stainless steel

作　　者：赵立岩[1] 曹健[1] Zhao Liyan;Cao Jian(Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学,先进焊接与连接国家重点实验室

出　　处：《焊接》2019年第9期1-4,I0020,共5页Welding & Joining

基　　金：国家自然科学基金航天联合基金重点项目(U1737205,U1537206);国家自然科学基金委优秀青年科学基金项目(51622503)

摘　　要：采用Ag-Cu钎料对Ti 3Al与316L不锈钢进行真空钎焊连接,通过扫描电镜、能谱分析仪和X射线衍射仪分析了接头界面结构并对其形成机理进行了分析,同时,研究了钎焊温度对接头界面组织以及抗剪强度的影响。结果表明,在固定保温时间为5 min时,接头的抗剪强度先随着钎焊温度的升高而增大,当钎焊温度为800℃时,接头抗剪强度达到最大值为343 MPa,当钎焊温度进一步升高时,接头抗剪强度会呈现降低趋势。接头的典型界面结构为Ti3Al/AlCu2 Ti+Cu2 Ti+Cu(s,s)+Ag(s,s)+CuTi+Fe 2Ti/316L不锈钢。Vacuum brazing of Ti 3 Al and 316L stainless steel is realised with the Ag-Cu brazing filler.The interfacial microstructure of the joint is investigated by scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS),and X-ray diffraction(XRD)and its forming mechanism is analysed.Meanwhile,effects of brazing temperature on interfacial microstructure and shear strength of the joint are studied.It is found that when holding time is fixed at 5 min,shear strength of the joint increases with the increase of brazing temperature.When the joint is brazed at 800℃,the highest joint strength of 343 MPa is achieved,and shear strength of the joint begins to drop with the further increase of brazing temperature.The typical microstructure of the joint is Ti 3 Al/AlCu 2 Ti+Cu 2 Ti+Cu(s,s)+Ag(s,s)+CuTi+Fe 2 Ti/316L stainless steel.

关 键 词：TI3AL 316L不锈钢 工艺参数 

分 类 号：TG454[金属学及工艺—焊接]