The welding process of 18 mm thick 7 B52-T6 bulletproof aluminum alloy plate is studied by MIG welding with ER5356 welding material as filler material. The microstructure and mechanical properties of butt joint are analyzed, which provides experimental basis and theoretical support for the welding of bulletproof aluminum alloy medium thick plate. The results show that the selected welding process and materials are reasonable and feasible, no welding defects are found in NDT and macro metallographic test, which can meet the quality requirements of the grade Ⅰ weld. The average tensile strength of the welded joint reaches 287.3 MPa, and the welding coefficient is about 0.52. The performance of the welding procedure qualification has achieved the relevant requirements,and the evaluation is reasonable, which can be used to guide the welding of 7 B52-T6 aluminum alloy structural parts.
7B52-T6 aluminum alloyMIG weldingbutt jointwelding process