Bulletin PNRPU. Mechanical engineering, materials science

The experience of plasma welding of thin-walled compounds on the forward and reverse polarity. Experiments using different gases and unprotected. The possibility of a productive and high-quality welding of thin-walled compounds of the flanging using plasma technology.

Medical studies indicate that the welding aerosols are one of the leading causes of occupational diseases welder, such as pneumoconiosis, etc. From the point of view of industrial safety is monitored only permissible concentration of hazardous substances included in the welding fumes. However, these data do not provide a complete picture of the impact of these substances on the body, a more important indicator is the mineral form of localization elements especially in the solid component of welding fumes, as well as their morphology, structure and dispersion. The authors present the results of a study on the morphology, structure and dispersion of the particles of the solid component of the electrodes for welding aerosols with different coatings. The characteristic relationship between composition and morphology, as well as between the particles and the nomenclature of view coverage.

The effect of current polarity on the mechanism of heat transfer in the product during the plasma heating. The quantitative ratio of transmitted power between the product and the plasma flow near the electrode processes at the surface of the product.

The article provides an overview of welding modes as an important component of welding technology. Considered instead the options the destination of welding parameters for specific conditions. Firstly have to reference tables compiled on the basis of generalization of experimental data. Secondly using settlement established analytical dependence. Shows the features and problems destination optimum parameters for each option.

The study, whose results are presented in this paper aims to study the phase-separation processes in melts petrurgical materials on the example of synthetic mineral alloys. The author draws an analogy between the phenomenon of phase separation of magmas in nature, which ensures the formation of complex patterns and textures of natural stone, set the data allow to consider the phase-separation phenomena in petrurgical melts, petrochemical as a managed process, that will provide the aesthetic and operational characteristics of these materials.

The article describes the design process formalized problems for students of technical universities, directed on fostering their professional competence descriptors, corresponding to the professional activities of graduates.