薄壁GH169合金端接接头焊接缺陷研究

Study to Welding Flaw in Inconel 718 Edge Joints of Thin Sheet

研究了壁厚0．15mmGH169合金端接接头的焊接缺陷产生机理，认为焊接缺陷是焊接过程中焊缝金属被氧化造成的，由于金属被氧化导致了焊缝熔合不良。采用端接接头反面成型及加强背面保护等工艺措施可以极大地降低焊缝熔合不良的敏感性。

The welding flaw in Inconel 718 edge joints of 0.15mm think was studied. It is considered that the oxidating in welding results in lack of penetration. The susceptibility to the lack of penetration can be diminished greatly by forming and protecting the underbead.