Influence of physical fields on the strength characteristics of materials of lowresource parts

An important scientific and applied task is to solve the problem of extending the service life of low-resource parts of machines and devices in the production and processing food industry.The paper examines the influence of a number of physical fields on the mechanical characteristics of the surface layers of structural materials.Improving the strength characteristics of working surfaces, especially low-resource parts, by processing them with certain physical fields, namely of laser, radiation and acoustic origin, makes it possible to significantly influence the structure of materials, obtaining their general cross-sectional heterogeneity, to modify and significantly extend the terms of their use in production.The purpose of the work is to determine the influence of the indicated physical fields on such strength characteristics as fatigue, hardness and wear resistance of the studied materials.It was established that the influence of the specified physical fields leads to significant changes in the physical, mechanical and structural characteristics of materials.Laser processing of the near-surface layers of most of the studied materials negatively affects their fatigue characteristics under significant amounts of operating loads.The combined processing of the surface of materials by the physical fields of laser radiation and laser-acoustic irradiation allows, due to the change of structural characteristics, for homogeneous materials in the entire range of repetitively variable stresses, and for "complex" alloysin the zone of stresses close to the fatigue limit, to significantly increase them endurance, wear resistance and corrosion resistance.Increasing the wear resistance, corrosion resistance and durability of the working surface of the material of problem parts significantly extends their service life.The operation of equipment with reinforced working surfaces of parts shows that their mass use in production will make it possible to significantly reduce the duration and labor intensity of repair work, increase the service life of the equipment itself, and this, in turn, will significantly increase the efficiency and profitability of production.