IMPROVED DEOXIDATION TECHNOLOGIES AND SECONDARY TREATMENT OF RAIL ELECTRIC STEEL IN ORDER TO IMPROVE THE QUALITY OF RAILWAY ROLLING
https://doi.org/10.17073/0368-0797-2015-10-721-727
Abstract
The studies conducted under the conditions of the electric-furnace
melting shop of “EVRAZ ZSMK” have shown that the increase of the duration of the rail steel blowing with an inert gas, when processing
at the aggregate “ladle-furnace” from 63 to 122 min., reduces the number of oxide non-metallic inclusions; while the remaining controlled quality parameters of fi nished rails are not worsen. Production experiments have proved the technical and economic efficiency of silicomanganese of FeMnSi30HP brand instead of silicomanganese of MnS18 brand for deoxidation of rail steel under the conditions of the electric-furnace melting shop of “EVRAZ ZSMK”. An increase in the degree of pass-through assimilation of carbon and silicon has been found (by 4 % and 13 % respectively). The mechanical properties and microstructure of rails, obtained when using experimental techniques, are at the current melting production. According to the obtained calculated data from the use of cost-effectiveness of a new brand of ferroalloy FeMnSi30HP is 13.99-32.64 rubles/t for the rails of different categories.
About the Authors
N. A. Kozyrev
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Head of the Chair “Materials, Foundry and Welding Production”
E. V. Protopopov
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Dr. Sci. (Eng.), Professor, Rector
Russian Federation
Dr. Sci. (Eng.), Professor, Rector
A. A. Umanskii
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair of Ferrous Metallurgy
D. V. Boikov
OJSC “EVRAZ – Joint West Siberian Metallurgical Plant” (16, Kosmicheskoe route, Novokuznetsk, Kemerovo Region, 654043, Russia)
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Head of the Steel-Making Department
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Review
For citations:
Kozyrev N.A., Protopopov E.V., Umanskii A.A., Boikov D.V. IMPROVED DEOXIDATION TECHNOLOGIES AND SECONDARY TREATMENT OF RAIL ELECTRIC STEEL IN ORDER TO IMPROVE THE QUALITY OF RAILWAY ROLLING. Izvestiya. Ferrous Metallurgy. 2015;58(10):721-727. (In Russ.) https://doi.org/10.17073/0368-0797-2015-10-721-727
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