Lutsak D. Increase of abrasive wear resistance of details by surfacing of materials with the realization of self-propagating high-temperature synthesis

The thesis is dediated to the solution of the actual scientific and technical problem – increasing the abrasive wear resistance of steel by combining of SHS with electric arc sur-facing using powder materials of Fe-Ti-B-C alloying system. As a result of the research, it was found that the high level of abrasive wear resistance of the surfaced layers of developed material is explained by the formation of a heterophase structure consisting of ferrite, Fe + TiC eutectics, TiB2 (~ 36%) and TiC (~ 17%) reinforcing particles. The equipment and research method of wear-resistance of materials under friction of loose abrasive have been developed. By analyzing images of projections of abrasive particles used for wear resistance tests, a new shape factor SPLm and a complex parameter of abrasive ability Kabr of the particles are proposed, which are in close correlation with the intensity of wear under friction of loose abrasive which made possible to substantiate the expediency of the developed research method. The industrial tests of screws for the manufacture of building ceramics, surfaced with the developed material, at the enterprises of PJSC "Budivelni materialy" and LLC "Bolekhivskyi zavod budivelnykh materialiv" have shown the increase in their dura-bility in 2,2-2,8 times compared with the serial electrodes of the brand T-590. The industrial tests of bottom plates for wood briquetting at the company LLC "Solid Ukraine", surfaced by the developed material, showed the increase in their durability in 1,2 times compared to the factory-surfaced bottom plates.