Welding method for cantilever structure with rib plates

The invention relates to the technical field of welding, in particular to a welding method for a cantilever structure with a rib plate, which is applicable to a similar structure made of common carbon steel, and the welding structure is composed of a flat plate, a vertical plate and a vertical rib plate structure, the vertical plate is of a fixed structure, the flat plate and the vertical plate are of a welding butt joint structure, and a welding groove is an asymmetric K-shaped groove. The vertical rib plate is in butt welding with the flat plate and the vertical plate through fillet welds and plays a role in supporting the flat plate and assisting in bearing. The welding method mainly comprises the welding steps of fillet weld welding of the vertical rib plate and the flat plate, butt joint main weld welding of the flat plate and the vertical plate, fillet weld welding of the vertical rib plate and the vertical plate, postweld heat treatment and the like. The method has the advantages that the levelness of