不同热处理状态2219铝合金TIG焊接头组织性能分析
发布时间：2019-02-20 20:10
【摘要】：采用"直流氦弧打底+交流氩弧盖面"的两层TIG自动焊进行了2219CYS与2219C10S的焊接,分析了不同热处理状态焊接接头的组织及成分,进行了接头常温及低温(-196℃)拉伸试验及断裂行为研究.结果表明,2219C10S和2219CYS母材组织均为α(Al)基体上分布着Al2Cu强化相,但母材显微组织形态存在较大差异.焊缝和部分熔化区晶界上分布着条网状α+θ共晶,内部为颗粒状α+θ共晶,固溶到基体中的Cu元素含量分布不均匀.接头断裂起源于CYS侧紧邻打底焊熔合线的部分熔化区,之所以在CYS侧启裂与母材强度、晶粒尺度、晶粒取向及晶界偏析有关.
[Abstract]:The double layer TIG automatic welding of "DC helium arc underlaying AC argon arc cover" was used to weld 2219CYS and 2219C10S. The microstructure and composition of welded joints under different heat treatment conditions were analyzed. Tensile tests and fracture behavior of joints at room and low temperatures (- 196 鈩，
本文编号：2427220
[Abstract]:The double layer TIG automatic welding of "DC helium arc underlaying AC argon arc cover" was used to weld 2219CYS and 2219C10S. The microstructure and composition of welded joints under different heat treatment conditions were analyzed. Tensile tests and fracture behavior of joints at room and low temperatures (- 196 鈩，
本文编号：2427220
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