Modern trends in the development of ladle metallurgy and the problem of nonmetallic inclusions in steel

The main trends in the development of the ladle treatment of steel have been analyzed. The most complex problem is shown to be the formation of nonmetallic inclusions having a certain type and a low concentration. The main parameters of the ladle treatment of steel that control the type and amount of nonmentallic inclusions in ready products are analyzed using the data of industrial heats, laboratory experiments, and physicochemical simulation and computation. The principles of control of steel purity in nonmetallic inclusions are formulated, and the main trends in the development of the concepts of nonmetallic inclusions are determined.     

Analog simulation as a means of calculating the cooling of laminated magnetic circuits

A method of calculating the cooling of laminated magnetic circuits under vacuum conditions is proposed. The problem is reduced to finding the two-dimensional steady-state continuous temperature field for mixed boundary conditions. Numerical solutions are obtained for a heating core using the analog simulation technique and an EI-12 integrator.     

The Effect of Microphases on Elongation of Nanostructured Bainitic Steels

Metallurgist - Nanostructured bainitic steel consisting of nanoscale bainitic-ferrite and retained austenite has been obtained by transforming at 200°C for 10 days. Despite the large volume...     

Effect of Composition and Processing Parameters on Microstructure and Mechanical Properties of If-Steel Cold-Rolled and Galvanized Rolled Products

Metallurgist - The effect of composition, parameters of hot and cold rolling, and recrystallization annealing in continuous annealing units (CAU) on the microstructure and mechanical properties of...     

A subhierarchic method for the solution of a pseudodifferential equation in the problem of diffraction in layers coupled through an aperture

The boundary-value problem of diffraction for the system of Maxwell equations in layers coupled through an aperture is investigated. The layers are formed by three infinitely thin perfectly conducting planes. The method of the Green’s functions is applied to reduce the boundary-value problem to a pseudodifferential equation on the aperture. The numerical results obtained with the use of a subhierarchic method are presented.