Browsing by Author "Stoyakin A."

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    Influence of the transversal displacements of metal on the camber formation of hot-rolled strip
    (2017-01-01) Belskiy S.; Yankova S.; Mazur I.; Stoyakin A.
    Transversal displacements of metal in the hearth of deformation reduce unevenness of elongations across strip width, wherein the camber curvature becomes smaller, and its radius is larger than that calculated on the assumption of plane deformation scheme. The investigations are based on the variational principle of possible changes of strain state (Jourdain principle). It is assumed that the input velocity unevenness of the metal flow in the hearth of deformation across the strip width passes into an output one proportionally to reductions. Further, velocities and powers of deformation and displacements of metal in the hearth of deformation during hot rolling and corresponding powers are calculated. Solving Euler-Poisson's equation, we receive the expression for coefficients, which take into account the influence of the transversal displacements of metal on decreasing the output unevenness and the radius of camber curvature for every harmonic.
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    Temperature field of stripes under hot rolling
    (2015-01-01) Belskiy S.; Yankova S.; Chuprov V.; Bakhaev K.; Stoyakin A.
    The study of temperature distribution along width of stripes in the Hot Rolling Mills HRM 2000 line was carried out in collaboration of NLMK Hot Rolled Production specialists with students and lecturers of the Lipetsk State Technical University. This study was made using a portable thermal scanner BALTECH TR-1400. It was marked that the surface temperature increased from the right edge of the strip to the left in relation to rolling direction. The temperature distribution asymmetry along the width of the strip is one of the reasons for camber, wedging and flatness of hot-rolled strips.