FIELD: physics.
SUBSTANCE: present invention relates to techniques of making permanent joints, particularly to the method of inert gas arc welding butt joints of different aluminium alloys and can be used in aircraft building, rocket production, shipbuilding and other engineering fields for joining panel structures made from aluminium alloys. Single-side grooving is done on the side of the Al-Mg-Si alloy system. The aperture angle of the groove is defined by the expression α=nCMg, where CMg is content of magnesium in the Al-Mg alloy system and n=(3.5-5.8).
EFFECT: quality of welding is improved due to prevention of deformation after welding.
3 dwg, 1 tbl
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