TC4钛合金/304不锈钢异种材料蜂窝结构钎焊工艺  

Brazing process of TC4 titanium/304 stainless steel dissimilar materials honeycomb sandwich structure

作　　者：邓云华 岳喜山 李晓辉[3] 陶军 张胜 DENG Yunhua;YUE Xishan;LI Xiaohui;TAO Jun;ZHANG Sheng(Aeronautical Key Laboratory for Welding and Joining Technologies,AVIC Manufacturing Technology Institute,Beijing 100024,China;Northwestern Polytechnical University,Xi'an 710072,China;Military Representative Office of Chinese People's Liberation Army Accredited in Chengfei Company,Chengdu 610092,China)

机构地区：[1]中国航空制造技术研究院航空焊接与连接技术航空科技重点试验室,北京100024 [2]西北工业大学,西安710072 [3]中国人民解放军驻成飞公司军事代表室,成都610092

出　　处：《焊接学报》2019年第10期148-155,I0007,I0008,共10页Transactions of The China Welding Institution

摘　　要：采用Ti-37.5Zr-15Cu-10Ni和Ag-28Cu两种钎料分别对TC4钛合金面板/304不锈钢蜂窝芯异种材料蜂窝结构进行了钎焊,对钎焊界面组织和蜂窝结构的力学性能进行了对比分析.结果表明,Ti基钎料与304不锈钢蜂窝芯箔材界面润湿反应性能较差且Ti基钎料钎缝显微硬度较高,导致钎焊界面强度低,蜂窝拉伸力学性能差.Ag基钎料与304不锈钢蜂窝芯箔材和TC4面板均发生显著的界面反应,钎焊温度830℃,保温时间10 min时,蜂窝抗拉强度为10.35 MPa,呈蜂窝芯破坏特征.Ag基钎料蜂窝抗拉强度明显优于Ti基钎料结果,适用于TC4钛合金面板/304不锈钢蜂窝芯异种材料蜂窝钎焊.TC4 titanium face sheet/304 stainless steel honeycomb core dissimilar materials honeycomb sandwich structures were brazed by Ti-37.5Zr-15Cu-10Ni and Ag-Cu28 brazing filler metals respectively.Microstructure of brazing interfaces and mechanical properties of honeycomb sandwich structures brazed by both brazing filler metals were comparatively analyzed in details.Results show that the wettability between 304 stainless steel honeycomb core and Ti-based brazing filler metal is poor and the hardness of brazed interface is relatively high,which lead to the low strength of Ti-37.5Zr-15Cu-10Ni brazed interface.Significant reaction has taken place between 304 stainless steel honeycomb core and Agbased brazing filler metal.Honeycomb sandwich structure with the tensile strength of 10.35 MPa is attained at the brazing temperature of 830°C with the bolding time of 10 min.Compared with Ti-based brazing filler metal,Ag-based brazing filler metal is suitable for brazing TC4 titanium/304 stainless steel dissimilar materials honeycomb sandwich structures.

关 键 词：异种材料蜂窝 银基钎料 钛基钎料 钎焊界面 力学性能 

分 类 号：TG454[金属学及工艺—焊接]