钎剂中Cu元素对铝/钛异种金属熔-钎焊接头影响  

Effect of copper alloyed flux on aluminum/titanium welded-brazed joint

作　　者：景艳 何欢 谢志宏 徐望辉 Jing Yan;He Huan;Xie Zhihong;Xu Wanghui(School of Construction Machinery,Shandong Jiaotong University,Jinan 250357,China;Guangdong Provincial Key Laboratory of Advanced Welding Technology,Guangdong Welding Institute(China-Ukaine E.O.Paton Institute of Welding),Guangzhou 510651,China)

机构地区：[1]山东交通学院工程机械学院,济南250357 [2]广东省焊接技术研究所广东省中乌研究院,广州510651

出　　处：《焊接》2018年第9期1-5,65,共6页Welding & Joining

基　　金：国家自然科学基金资助项目(51605263)

摘　　要：将Cu元素合金化Nocolok钎剂成功应用于铝/钛异种金属TIG熔-钎焊。与采用纯Nocolok钎剂相比,采用Cu元素合金化钎剂可显著提高钎料润湿性、有效控制界面化合物厚度并提高接头性能,断裂模式由钛侧钎焊界面的韧脆混合型改变为铝侧熔合区的韧性断裂。Cu元素对润湿性的改善与固、液相线的温度降低及钎剂中的金属氧化物有关。界面化合物厚度的减小及接头性能的提高可归因于钎剂中Cu元素的化学阻挡及界面合金化的共同作用。One of the non-corrosive Nocolok flux for brazing of aluminum was developed by alloying with Cu and applied to TIG welding-brazing of aluminum-titanium butt joint.Compared with the Nocolok flux,the alloyed flux can promote wetting of molten aluminum filler on the titanium,suppress the formation of the intermetallic compounds(IMCs)layer,improve joint strength and influence the joint fracture mode.The positive effect of element Cu on wettability is related to the decrease in the solidus or liquid temperature and the metallic oxides existed in the alloyed element.The changes in IMC thickness and joint strength are attributed to the combination effect of the chemical barrier and interface alloying of element Cu.

关 键 词：合金钎剂 铜元素 熔-钎焊 金属间化合物 接头强度 

分 类 号：TG454[金属学及工艺—焊接]