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Zaporozhe, Ukraine

Panchenko A.I.,OAO Dneprospetsstal | Sal'nikov A.S.,OAO Dneprospetsstal | Gasik M.I.,National Metallurgical Academy of Ukraine
Steel in Translation | Year: 2011

A new smelting technology for IIIX15CΓ-B electrosteel is described. In this technology, the steel undergoes treatment in a ladle-furnace unit and a vacuum system. The output of bar batches of all five size groups is analyzed for the content of nonmetallic inclusions according to State Standard GOST 801-78 and the ASTM E-45 standard (method A). The phase-mineral composition of furnace slag on smelting steel in a DSP-60 arc furnace is studied by X-ray microstructural analysis. The change in chemical composition of oxide-fluoride slag when the steel passes through the ladle-furnace unit and the vacuum system is analyzed, along with the influence of CaF2 on the activity of FeO in oxide-fluoride slag and on the durability of the ladle lining. In conclusion, the need for environmental improvements is noted, in the light of the use of fluorspar; research into means of reducing fluorspar consumption must be activated. © 2011 Allerton Press, Inc. Source


Orzhitskaya L.K.,Ukrainian Research Institute of Special Steels | Koval' A.E.,Ukrainian Research Institute of Special Steels | Panchenko A.I.,OAO Dneprospetsstal | Sal'nikov A.S.,OAO Dneprospetsstal | Zhaivoronok A.V.,OAO Dneprospetsstal
Steel in Translation | Year: 2011

Defects in the form of dark scabs detected by ultrasonic monitoring are studied in the macrostructure of corrosion-resistant titanium steel after ladle treatment. The type and morphology of the inclusions in the defect are studied, and their origin is analyzed. The role of exogenous and endogenous inclusions in the dark scab is discussed. © 2011 Allerton Press, Inc. Source

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