на одну тонну литья.
Ключевые слова: поршневые кольца, маслотные отливки, высокопрочный чугун, модификатор, химический состав, центробежное литье.
Borovik N.V. Modernization of production technology of piston rings' made of ductile iron for diesel engines of diesel locomotives. - Manuscript
Dissertation on defending of science degree candidate of technical sciences on speciality 05.16.04 - Foundry production. - Physico - technological institute of metals and alloys of National academy of sciences of Ukraine, Kyiv, 2006.
Dissertation is devoting modernizing of technical - economical figures and quality stabilization of cast iron with spherical graphite in cast raw pieces (cast raw pieces for piston rings) under centrifugal casting in metallic mould, in first of all, by using rational regimes of modifying, optimization of chemical content and reduction of castings' thermal treatment. Have been investigated efficiency of spherical modifying master - alloys in shape of alloying master - alloys (alloys in the bases of Si, Fe, Cu, Ni) and brickets (pressed compounds of little materials fraction). It have been tested introduced method of graphitizing treatment of liquid cast - iron in foundry mould in process of it's revolving. Explored physico- mechanical properties of complex alloyed cast iron was investigated and recommendations for it's optimal content for piston rings was made. There were carried out production testing of discovered technological regimes and testing of it's economical efficiency was made.
Key words: piston rings, raw piston rings cast part, ductile iron, modifying maser alloy, chemical content, centrifugal casting.