超声交流TIG焊声场及电弧特性分析  

Acoustic Field and Electric Arc of Ultrasonic. Alternative Current TIG Welding

作　　者：徐明达 逯允龙[2] 姜国玉 鄂英子 于佳丽 

机构地区：[1]齐齐哈尔高等师范专科学校,161005 [2]哈尔滨理工大学材料学院,哈尔滨150040

出　　处：《精密成形工程》2014年第1期32-37,共6页Journal of Netshape Forming Engineering

基　　金：黑龙江省教育厅职高专院校科研项目（12520140）

摘　　要：目的研究复合焊接过程中，发射端高度、喷嘴高度及保护气流量等工艺参数对空气中声场强度的影响规律及作用机理。方法采用分组实验的方法．分析了各焊接工艺参数对声场强度的影响。结果研究结果表明：发射端高度及喷嘴高度对声场强度影响最大，保护气流量几乎无影响；不同发射端高度下，声场强度峰值所对应的喷嘴高度不同。结论通过对实验结果进行分析．得到了优化的焊接工艺参数：发射端高度为30mm，喷嘴高度为11mm，弧长为4mm，电流为120A，保护气流量为25mL／min；得出了交流复合超声TIG堆焊中，超声可细化组织并使组织均匀化。Objective To research the effect rule and mechanism of the emission end height, nozzle height and shielding gas flow on the acoustic field intensity during the welding process. Methods A grouped experiment was carried out to analyze the effect of welding parameters on the acoustic field intensity. Results The results indicated that the emission end height and nozzle height had the greatest impact on the acoustic field intensity whereas the flux of shielding gas has no effect. With different emission end heights, the nozzle heights corresponding to the maximum of acoustic field intensity were different. Conclusion Through the analysis of the experimental results, the optimized parameters of welding process can be obtained： emission end height is 30 mm, nozzle height is 11 mm and the length of arc is 4ram; welding current is 120 A and the flux of shielding gas is 25 mlfmin. Experiments of composite ultrasonic alternative current TIG bead welding shows that ultrasound can refine the organization and make the organization uniform.

关 键 词：TIG焊 超声 铝合金 微观组织 

分 类 号：TG444[金属学及工艺—焊接]