Izbor dodatnog materijala za regeneraciju zupčanika na bazi razmatranja habanja i oštećenja radnih površina zubaca

摘要

U radu se razmatraju rezultati ispitivanja regenerisanih zupčanika izrađenih od čelika za cementaciju metodom navarivanja. Zupčanici su regenerisani na dva načina: navarivanjem sa dodatnim materijalom, koji je naknadno cementiran, hemijsko-termički tretiran, pa mehanički obrađen, i navarivanjem sa dodatnim materijalom visoke tvrdoće ( ≈ 60HRC). Regenerisani zupčanici su ispitivani na uređaju zatvorenog kola snage sa promenom veličine obrtnog momenta. U toku ispitivanja je meren intenzitet habanja, a određivan je i vek njihovog trajanja. Potom je ispitivana njihova mikrostruktura, raspodela tvrdoće, kao i prisustvo grešaka tipa prslina. Izvršena su i modelska ispitivanja epruveta od istog materijala na tribometru tipa "block on disc". Na kraju je dota i analiza ekonomske efektivnosti regeneracije konkretnog zupčanika.%This thesis considers the testing results for regenerated gears made of steel for case hardening by surfacing method. The gears were regenerated in two ways: they were surfaced with the additional material which was hardened later, then chemically and thermally treated and finally mechanically treated; and they were surfaced with the additional material of high-degree hardness ( ≈ 60HRC). Regenerated gears were tested on the device of the closed circuit of power with altering the rotary moment rate. Later on, their microstructure, hardness distribution, as well as the presence of errors like cracks were tested. Sample tests of test tubes made of the same material were also done on the tribometre like "block on disc". At the end, an analysis of economic effectiveness of the concrete gears regeneration was presented.