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Nakonechnyi A.Y.,Ausferr Research and Technological Center | Urtsev V.N.,Ausferr Research and Technological Center | Sinyakov R.V.,Donetsk National Technical University | Kudrin V.A.,Moscow Evening Metallurgical Institute | And 2 more authors.
Steel in Translation | Year: 2010

An improved dynamic model demonstrates that the surface activity of sulfur has a positive influence on the desulfurization of metallic melt during the solution of manganese. With 1% increase in the sulfur content at the phase boundary, desulfurization increases by 3-12%, on average. The calculations here employ relative values and assume steady conditions, without taking account of the actual surface layer thickness. In other words, these are additive calculations. © 2010 Allerton Press, Inc. Source


Salganik V.M.,Magnitogorsk State Technical University | Chikishev D.N.,Magnitogorsk State Technical University | Denisov S.V.,OAO Magnitogorskii Metallurgicheskii Kombinat MMK | Stekanov P.A.,OAO Magnitogorskii Metallurgicheskii Kombinat MMK | And 2 more authors.
Russian Metallurgy (Metally) | Year: 2013

The causes of the vertical bending of the front ends of plates during hot rolling are revealed. A finite-element mathematical model is developed to describe the state of stress of the metal in an asymmetric deformation zone with allowance for solving a temperature problem, and the model is adapted to the conditions of the 5000 rolling mill in OAO MMK. It is found that, in rolling with mismatched work roll speeds, the direction of bending of the front strip end is determined by the strip thickness and the deformation zone shape. The main cause of the bending of the front plate end at the stage of finishing stage of rolling is shown to be the difference between the roller bed level and the rolling line. New asymmetric deformation regimes are developed with allowance for the effect of the deformation zone shape on the direction of bending of the front strip end. The developed technological regimes of asymmetric rolling make it possible to decrease the mill downtime because of the bending of the breakdown bar ends and to reduce the metal volume rejected because of violated temperature regimes of the thermomechanical treatment of plates. © 2013 Pleiades Publishing, Ltd. Source


Salganik V.M.,Magnitogorsk State Technical University | Pustovoitov D.O.,Magnitogorsk State Technical University | Denisov S.V.,OAO Magnitogorskii Metallurgicheskii Kombinat MMK | Fomichev A.V.,Ausferr Research and Technological Center | And 2 more authors.
Steel in Translation | Year: 2012

Improvement of relatively thick strip (16-20 mm) produced on the OAO MMK 2000 broad-strip mill is considered. Artificial neural networks may be used to optimize broad-strip hot rolling, so as to obtain the required mechanical properties of the strip produced. High surface quality of the strip may be ensured on the basis of finite-element models for predicting the behavior of surface defects on rolling and hence identifying effective rolling conditions. © 2012 Allerton Press, Inc. Source

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