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Лекция Ведущего ученого

Технологии и министаны винтовой (радиально-сдвиговой) прокатки прутков мелких сечений
A mini-mill is a techno-process system, which is synthesized by a computer - based treatment of unique rolling experience in the area of radial-shear deformation of solid state workpieces from more than 300 grades of alloys. The optimum technical parameters of rods radial-shear have been integrated into the mill design at the stage of conceptual engineering. The co-axial position of the motor-gearboxes of the main drive and that of the work rolls reduces to minimum the dynamic loads, noise and vibration at rolling. The main drive and work stand are mounted on the same welded frame. There is no need to have a heavy-duty foundation. If it is necessary, the stands can be easily moved to a new place. The stands can be operated by the personnel with comparatively low skill, without support from engineers. Macro-shearing migrations of metal particles would dominate in the nucleation site for deformation , thus deeply working through the structure at all levels of metallo-physical construction; Practically, metal attributes would reach the potential maximum. In particular, plastic attributes and many performance ones would be enhanced by 1.5...2.0 times and more as compared with traditional methods of treatment under pressure. Term "Radial-shearing deformation" means radial deformation (reduction) of a workpiece according to scheme "circle-circle' . with spacious macro-shearing, induced by the slowing down of the movement of outer layer and accelerating the movement of the outer one. as metal keeps outflowing helicoidally in the deformation nucleation site. The trajectories and rates of deformation and work-up of metal structure at RSR are unique. They are quite effective for: - making metal structure as finely divided; - making rolled stock with naturally composed pseudo-layered structure; - possibility for micro- and nano- structuring of metal in lengthy volumes. Such conditions are not feasible to be achieved in principle in other stationary treatments of metal under pressure. Product range. - carbon, structural, tool, rust-resistant, refractory, heat resistant grades of steel. - of copper, titanium, nickel, zirconium, aluminum, and respective alloys . etc., including those made through continuous casting and powder.

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