TA15钛合金A-TIG焊试验分析

Activating-tungsten inert-gas welding for TA15 titanium alloy

从焊缝成形、焊缝气孔、接头力学性能、微观组织、接头抗腐蚀性能等方面对TA15钛合金A-TIG焊进行了试验研究,并和常规TIG焊进行了比较。结果表明,A-TIG焊能够有效减小熔宽、增加熔深;A-TIG焊能够有效减少气孔数量,提高接头的抗拉和抗弯性能;和常规TIG焊相比,A-TIG焊HAZ较窄且组织较细,而两者的焊缝区组织基本相同;活性剂的加入并没有降低A-TIG焊接头的抗腐蚀性能。总之,TA15钛合金A-TIG焊比常规TIG焊具有明显优势。

In the view of weld form,weld pore,joint mechanical properties,microstructur and joint anti-erode performance,etc, A-TIG(activating-tungsten inert-gas) welding for TA15 titanium alloy has been studied.The experimental results show that compared with conventional TIG(tungsten inert-gas) welding,A-TIG welding can increase weld bead penetration while decrease weld bead width,and can decrease the number of pore effectively,also can enhance joint tensile property and bend property.Heat-affected zone of A-TIG welding is narrower, and its microstructure is finer in comparison with TIG welding,while their microstructures of weld zone are almost same.The activating flux doesn't affect joint anti-erode performance.A-TIG welding is superior to conventional TIG welding for TA15 titanium alloy.