Defects and strengthening of welded connections
Defects in welded joints worsen the strength, tightness, continuity of welds, contribute to the premature destruction of not only individual elements, but also the structure as a whole. The article discusses typical defects of welded joints, their impact on the operability of the structure. A brief description of destructive and non-destructive methods of detecting defects is given. Quantitative indicators of steel weldability by carbon content, their influence on the tendency to crack in welds are analyzed. Methods of strengthening welded joints by increasing their length and width, features of strengthening butt and corner seams, elements of non-welded steel, seams with through cracks, correction of defects in the root of the seam of butt pipes are considered. Attention is also paid to the specification of welding techniques in accordance with the existing material.