活性剂钨极惰性气体保护电弧焊接熔池行为的观察  

Observations of Molten Pool Behavior during A-TIG Welding

作　　者：张瑞华[1] 尹燕[1] 水谷正海[2] 片山聖二[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050 [2]大阪大学接合科学研究所,日本大阪567-0047

出　　处：《机械工程学报》2009年第3期115-118,123,共5页Journal of Mechanical Engineering

基　　金：甘肃省自然科学基金(0710RJZA046);兰州理工大学科研基金资助项目

摘　　要：利用高速数字摄相机对涂敷活性剂与不涂活性剂条件下的熔池表面流体流动形态及等离子体行为进行观察。利用X射线实时焊缝数字观察系统,用钨粒子示踪法测试熔池流体流动的规律。试验结果表明,活性剂使电弧收缩、改变熔池流体的流动方向并使流体流动速度加快,有活性剂时的涡流流动速度比无活性剂的涡流流动速度增加4倍,强烈的熔池流体向内对流是活性剂钨极惰性气体保护电弧焊熔深增加的主要原因,验证了数值模拟得到的结果。The effects of flux on fluid flow of the weld pool surface and arc profiles are observed in conventional TIG welding and in A-TIG welding by using high-speed video camera. The fluid flow behavior is visualized in realtime by micro focused X-ray transmission video observation system. The results indicate that stronger inward fluid flow patterns leading to weld beads with narrower width and deeper penetration can be apparently identified in the case of A-TIG welding. The flux can change the direction of fluid flow in welding pool and make the fluid flow speed increase four times. It agrees well with the simulation results.

关 键 词：X射线 实时焊缝数字探伤 熔池流动 活性剂钨极惰性气体保护电弧焊 

分 类 号：TG40[金属学及工艺—焊接]