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Kozyrev N.A.,Siberian State Industrial University | Protopopov E.V.,Siberian State Industrial University | Umanskii A.A.,Siberian State Industrial University | Boikov D.V.,OAO EVRAZ Obedinennyi Zapadno Sibirskii Metallurgicheskii Kombinat EVRAZ ZSMK
Steel in Translation | Year: 2015

Research in the electrosmelting shop at OAO EVRAZ ZSMK indicates that, if inert gas is injected into molten rail steel in the ladle for 122 min, rather than 63 min, the quantity of nonmetallic oxide inclusions may be reduced, without impairing overall rail quality. Industrial experiments show that replacing MnS18 silicomanganese with FeMnSi30HP silicomanganese in the reduction of rail steel is economically effective in the electrosmelting shop at OAO EVRAZ ZSMK. The assimilation of carbon and silicon is increased by 4 and 13%, respectively. The mechanical properties and macrostructure of rails obtained by this experimental technology match those of the steel currently produced. According to the calculation results, the use of FeMnSi30HP ferroalloy provides savings of 13.99 and 32.64 rub/t for rails of category T1 and NE, respectively. © 2015, Allerton Press, Inc. Source


Protopopov E.V.,Siberian State Industrial University | Seleznev Y.A.,OAO EVRAZ Obedinennyi Zapadno Sibirskii Metallurgicheskii Kombinat EVRAZ ZSMK | Cherepanov A.N.,RAS Institute of Theoretical and Applied Mechanics | Foigt D.V.,OAO EVRAZ Obedinennyi Zapadno Sibirskii Metallurgicheskii Kombinat EVRAZ ZSMK | And 2 more authors.
Steel in Translation | Year: 2013

The influence of nanopowder modification of metal on the quality of continuous-cast slab is investigated. The introduction of powder strip with titanium-carbonitride filler in the tundish of the continuous-casting machine reduces the liquation of chemical elements over the slab cross section, increases the chemical and structural homogeneity, shrinks the region of dendritic structure, curtails the development of macrostructural defects, and enhances the density and mechanical properties of the cast steel. © 2013 Allerton Press, Inc. Source


Gromov V.E.,Siberian State Industrial University | Morozov K.V.,Siberian State Industrial University | Yur'ev A.B.,OAO EVRAZ Obedinennyi Zapadno Sibirskii Metallurgicheskii Kombinat EVRAZ ZSMK | Peregudov O.A.,OAO EVRAZ Obedinennyi Zapadno Sibirskii Metallurgicheskii Kombinat EVRAZ ZSMK
Steel in Translation | Year: 2015

Transmission electron microscopy permits layer-by-layer structural analysis (along the central axis and in the direction of the rounded corner) of bulk-quenched and differentially quenched rails at distances of 0, 2, and 10 mm from the working surface. Regardless of the direction and the distance from the working surface, the structure of all the rails consists of plate-pearlite grains and ferrite grains, containing cementite particles of different shape (ferrite–carbide mixture) and grains of structure-free ferrite (ferrite grains that do not contain carbide phase, grain-boundary ferrite). The morphology and defect substructure of the phases are studied; the locations of the stress concentrators are established. Formulas are derived for the fragmentation parameters of the grains in the ferrite–carbide mixture as a function of the heat-treatment conditions and the distance from the working surface. © 2015, Allerton Press, Inc. Source

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