钎缝间隙对TC4与Ti_3Al-Nb合金钎焊接头组织的影响  

Influence of Joint Clearance on Microstructure and Property of Brazed Joints of TC4 and Ti_3Al-Nb Alloy

作　　者：杨丽[1] 王辉亭[2] 崔约贤[1] 张宏志[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨大电机研究所,黑龙江哈尔滨150001

出　　处：《材料开发与应用》2006年第1期28-30,共3页Development and Application of Materials

摘　　要：采用50Ti-20Zr-20Ni-10Cu粉末钎料对Ti3Al-Nb(Ti-13Al-24Nb)(质量分数)合金与TC4合金(Ti-6Al-4V)进行真空钎焊,通过SEM、EDS电子探针及拉伸试验,研究不同钎缝间隙的钎焊接头的显微组织及性能特征。结果表明,钎缝间隙对钎焊接头的组织及性能有较大影响,当钎缝间隙增大时,钎焊接头的组织变得复杂,在接头中既形成了共晶组织又形成了化合物带,这种组织特征会显著降低接头的强度。Ti3Al-Nb（Ti-13Al-24Nb）and TC4 （Ti-6Al-4V） alloys were brazed in vacuum furnace by using 50Ti-20Zr-20Ni-10Cu brazing powder. The brazed joint with different clearances were obtained through contolling the assembly gap. The microstructore and property characteristics of the joint were investigated by using scanning electron microscopy, energy dispersive spectroscopy, electron probe and tensile test. The results showed that the microstructures and properties were remarkably affected by the clearances. When the dearance increased,the microstructures of the brazed joint became compleex and the eutectic structure and compound strip coexisted in the brazed joint which is harmful to the strength of the brazed joint.

关 键 词：钎焊 TCA合金 TI3AL-NB合金 50Ti-20Zr-20Ni-10Cu钎料 

分 类 号：TG454[金属学及工艺—焊接]