摘要
进行了TC4电弧超声TIG焊接与传统TIG焊 ,利用X射线探伤检测接头质量 ,金相显微镜和SEM观察接头组织和断口 ,利用万能试验机测试接头拉伸性能。结果表明 ,严格按照航空标准进行TC4常规TIG焊与电弧超声TIG焊 ,所获得的接头均达到航空一级 ;随着加入超声频率的增加 ,激励电压的增大 ,电弧超声TIG焊焊缝组织细化、等轴化 ,枝晶破坏痕迹不明显 ,接头抗拉强度。
TC4 Ti alloy was welded by conventional tungsten iner-gas arc welding(TIGW) and arc-ultrasonic TIGW respectively. The microstructure of the joint was analyzed by means of optical-microscope, scanning electron microscope to study the relationship between the macro-properties of the joint and the microstructure. The results show that the joints were welded successfully by conventional TIGW and arc-ultrasonic TIGW. With the increment of ultrasonic frequency and activated voltage, the width of the joint became narrow step by step. The microstructure became more and more fine and was inclined to equiax crystal. Moreover, the dendrite depredation was not observed obviously. The properties of welded joint were improved compared with that of conventional TIGW.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2004年第6期97-98,共2页
Transactions of The China Welding Institution
关键词
电弧超声
TIG焊
TCA合金
arc-ultrasonic
tungsten iner-gas arc welding
TC4 titanium alloy
