Abstract
The paper presents the results of a study on obtaining a new composition of the material for plasma spraying of composite coatings on worn surfaces of children’s equipment. An analysis was carried out on the selection of a matrix and filler of a dispersed-filled composite for spraying on parts made of structural alloyed chromium steel. Based on the analysis, a multifactorial experiment was implemented on samples manufactured according to GOST 103-2006 with a thickness of 20 mm and a width of 75 mm. The main technological modes were identified and assigned, within the framework of which the selection of a new composition of the material for plasma spraying was carried out. A new composition of the material for plasma spraying of a metal matrix composite is theoretically justified and experimentally proven: titanium carbide with a fraction of 63—80 microns (73,6 microns) — 23.5 %; PR-NH17CR4 powder with a fraction of 40—64 microns — 76.5 %. The results of metallographic analysis of the investigated coating, as well as data on adhesion, hardness and wear resistance are presented. Conclusions are drawn about the prospects of using the developed composition of the material for plasma spraying in industry.
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