Registration Number
0226U001086,
(0123U100416)
, R & D reports
Title
Creation of technological processes of perlitic ductile cast iron obtaining with increased mechanical and functional properties for military equipment and vehicles.
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Створення технологічних процесів одержання високоміцних чавунів перлітного класу з підвищеними механічними та функціональними властивостями для виробів військової техніки та транспортних засобів.
Head
Bublykov Valentyn B., Доктор технічних наук
Registration Date
21-01-2026
Organization
Physico-technological institute of metals and alloys National academy of Sciences of Ukraine
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Development of scientific principles of melt modifying-refining processing processes for creation of technological bases of nodular graphite ductile cast irons of perlitic grade obtaining with increased indicators of strength, plasticity, cyclic durability, fragmentation at impulse destruction for the production of important cast parts of military equipment, railway transport, trucks, tractors, power equipment, etc.
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Research goal – development of scientific principles of melt modifying-refining processing processes for creation of technological bases of nodular graphite ductile cast irons of perlitic grade obtaining with increased indicators of strength, plasticity, cyclic durability, fragmentation at impulse destruction for the production of important cast parts of military equipment, railway transport, trucks, tractors, power equipment, etc.
Technological methods for intensifying of graphite clusters (nano-scale regions with a high carbon content) formation in the initial Fe-C-Si melt have been identified. These clusters enhance the modifying effectiveness by increasing the number of nucleation sites for spheroidal graphite inclusions and prevent the chill formation (white iron) in thin-walled castings structure. It has been shown that copper and nickel are key alloying elements for pearlitic ductile cast iron producing. Copper promotes the fine pearlite formation and increases strength, but reduces ductility. Nickel, in contrast, improves ductility and impact toughness. The combined application of modifying-refining treatment of cast-iron melts using a MgCa-FeSi alloy together with CaF2 and complex alloying with copper and nickel allows to achieve an optimal combination of properties, rendering such ductile cast iron as a universal material for modern mechanical engineering.
The use of set of developed basic technological parameters (a steel scrap charge, initial melt premodifying treatment, alloying with 1.0 wt.% of copper instead of more expensive alloying with 1.2 wt.% nickel, and modifying-refining treatment with a master alloy FeSiMg7Ca4) prevents the chill formation and ensures the production of pearlitic ductile cast iron with high mechanical properties (Rm = 850-950 MPa at A = 8.5-5.0 %), which significantly exceed the requirements for the pearlitic ductile cast iron grade EN-GJS-800-2 according to the standard DSTU EN 1563:2018.
Product Description
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Doroshenko Volodymyr S.
Nesteruk Olena P.
Yasynskyi Oleksandr O.
Yurii D. Bachynskyi
Ovsiannykov Volodymyr O.
Olena O. Yasynska
Medvid Serhiy M.
Сhaplyhina Liudmyla S.
Moiseieva Nataliia P.
Berchuk Dmytro M.
Viktoriia V. Perekhoda
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2026-01-21
