Литье и металлургия

Researches of the most often occurred surface defects of rolled wires, their modification at drawing and influence on technological process and quality of cold-drawn wire with regard to working conditions of hardware shops of OAO “BMZ” are presented.

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Influence of temperature of metal fitting in the heating furnace on transformation of cracks is shown. It is established that the most preferable is «hot fitting» from the point of view of decrease of specific gas discharge for the blank heating and productivity increase.

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It is shown that at manufacture of metal cord of compact constructions there is a possibility to control by various processing methods the inclination of metal cord layers to migration.

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It is shown that the developed methods of carrying out of inter-laboratory verifying tests enable to estimate accuracy of applied test methods and results of measurements.

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The results of experimental researches of thermal work at the example of the annular furnaces functioning in conditions of axis-rolling production of Dneprovsk metallurgical industrial complex named after Dzerzhinsky are given.

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Technological aspects of temperature processing of articles of carbon are considered and construction of thermal installation is offered.

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The offered and realized additive model of calculation of specific norm of consumption of scrap metal at arc electric steel-smelting furnaces has allowed to reduce considerably the error at calculation of the planned cost price of production.

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It is shown that use of fiber of the modern material, capable to replace metal reinforcing rod in ferroconcrete, provides decrease of expenses for reinforcing works, increase of degree of production mechanization.

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Researches on influence of high-speed heating temperature, regimes of cooling and temperature of abatement on structure and mechanical properties of pipe steel 32G2 are carried out. Recommendations on the regimes of high-speed thermal processing of steel 32G2 which can be used at manufacturing of seamless pipes are given.

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The researches of influence of the cyclically modulated by amplitude high-frequency magnetic field on mechanical and tribotechnical characteristics of composites with polymericfluorine matrix are carried out for the first time.

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The theoretical explanation of the rolling process of straps of a variable on length of thickness on mobile profiled mandrel is presented. It is shown that generally the deformation center is divided into zones of settling, shift and an advance. At a certain proportion between degree of deformation and diameter of rollers braking of the latter occurs and in the deformation center just one zone of shift takes place.

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Controlling is philosophy and way of thinking of leaders, oriented to effective development of the enterprise and economic usage of resources.

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Integration of IT with concept elements “Poka-jeke” in quality system allows to lower variability of processes and to receive effective results at control of product quality.

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The mathematical apparatus for calculation of process of thermal heating and cooling of the detail which is situated in modeling environment of the furnace is presented. Modules of the software “ProTerm-1” in the environment of visual programming Delphi 7.0 for operating system Windows 95/98/2000XP vista are described.

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The mathematical apparatus for the calculation analysis of the metal current process in casting mold cavities is described. Boundary conditions for calculation of high-speed regimes and time of filling with metal of complex in the dimensional respect moulds are developed.

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The method of physical modeling of hydrodynamic processes of alloys molding is developed. It is shown that as a liquid it is necessary to use water and diethyl ether at molding of steel, silumins, tin-base bronzes and water-glycerine solutions.

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The new approach at calculation of two-phase zone in the interval of crystallization of aluminum-silicon alloys with use of thermal analysis is given.

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The mechanism of cast iron alloying through slag phase due to use of nickel and copper oxides is considered and the analysis of kinetics regularity of alloying in case of absence of fuse in the form of milled cast-iron chips in slag and at their presence in it is carried out.

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The basic mechanisms of the process of silicon restoration from alumina-matrix composite ligatures on the basis of quartz sand are established. The mathematical models, describing influence of temperature, an alloy preparation time and quantities of silica in alumina-matrix composite ligatures on silicon output in synthetic alloy, are presented.

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The research of lubricating ability of new “alternative” materials used in composition of separating coverings at molding of aluminum alloys under high pressure is carried out in the present work.

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It is established that for the purpose of increase of modifying efficiency of the melt from gray cast iron it is possible to use mechanically alloyed aluminum powder with superdispersed particles of aluminum and graphite oxide.

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The reasons of low impact strength and high temperature of viscous-fragile transition of the basic metal of gas pipe from steel 17G1С are investigated. It is established that high fragility of metal of pipe is caused by release of the cementite extended inclusions at the border perlite-ferrite by metallographic researches with application of methods of light and dark field.

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It is shown that high-speed heating of profiled electric-welded pipes made of a steel 20PS allows to optimize mechanical characteristics and to raise constructional durability of bearing structures of automobile equipment.

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Complex research of the powders received by means of attritor dispersion of the chips waste, formed at restoration of working surfaces of forming rolls and rollers at OAO “BMZ” is given. Results of experimental researches of grinding process are given, the optimum conditions of grinding are defined. The structure- and phase-formation of powder compositions on the basis of the hard a tungsten-containing alloys waste depending on grinding regimes is investigated.

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