DEFECTS IN METAL DURING PLASMA AND TIG SURFACING (REVIEW)

In the process of exploitation, such property of articles as working capacity most often depends on the quality and condition of the surface layer. Therefore, a complex approach that includes a multifactorial effect on phase formation and structure formation in metal systems with the use of modern equipment is of particular relevance. The quality of products, determined by a number of its mechanical properties, can be significantly reduced by the occurrence and spreading of defects in products in surfacing, welding and additive technologies that are associated with the use of highly concentrated energy sources, which is a significant problem.Preventing the occurrence of defects during surfacing is a priority and urgent task in modern machine-building production. The solution to this problem can be the selection of optimal deposition modes in accordance with the requirements for the quality of the welded layer, the mechanical properties of the material of the parts and the quality of the products as a whole. (paper)