钛合金交替供气GMAW焊接研究  

Research on Alternating Shielding Gas GMAW of Titanium Alloy

作　　者：赵文光[1] 李士凯[1] 雷小伟[1] 张斌斌[1] 李要宗 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2016年第2期54-57,64,共5页Development and Application of Materials

基　　金：船舶预研支撑技术基金资助(14J1.6.2)

摘　　要：研究了钛合金GMAW保护气交替供气方式对TA2平面堆焊焊缝的影响。利用高速摄像、电流传感器对焊接过程电弧形态、熔滴过渡、电流信号等信息进行采集,并记录焊缝的形貌特征,试验结果表明,交替保护下熔滴过渡方式为细滴状轴向过渡和粗滴状非轴向排斥过渡的混合过渡模式;平均焊接电流随时间延长以类似正弦波上下交替变化,变化频率与交替频率保持一致;相比Ar气、预先混合气,交替保护能够获得熔深更深、熔宽更宽的焊缝。The effects of a new method of supplying gases in an alternating Titanium alloy TA2 GMAW bead welding were in- vestigated. High-speed camera and hall sensor were used to collect the information of arc shape, droplet transition, current sig- nal and so on, and the morphology of weld cross section was recorded. The results show that the mode of droplet transfer un- der alternating manner is a mixed mode of fine droplets axial transition （ Ar atmosphere） and coarse droplets non-axial transi- tion （ He atmosphere） ; the welding current changes in sin waves over time, and the change frequency is consistent with alter- nating frequency; compared with conventional protection methods, the new one could produce deeper penetration and wider fusion width.

关 键 词：交替保护 钛合金焊接 高速摄像 

分 类 号：TG111.5[金属学及工艺—物理冶金]