The dynamics of dissolving at stirring by argon of carbonic powders, being produced by different suppliers of BMZ, is determined on the basis of computer modeling. The integral dependencies of the carbon changing in melt and of the carburizers mass on period of stirring for powders of different breakup are calculated. The criterion of dissolution of carbonic powder in steel melt is offered.

The main questions of formation and firmness of cindery foam in conditions close to the realized in blast-steel-making-furnace are considered. The nature of factors, stabilizing and breaking the cindery foam, is analyzed.

The solving of the problem of thermoelasticity at heating of cylindric slugs in terms of radiation-convection contraflow is presented.

Analytic overview of the methods of thermoelastic stresses in thermally massive steel slugs at heating is given.

The investigation results of dynamics of the crystallizer swinging mechanism of the slugs continuous casting machine, in which hydroelectric drive is applied, are examined.

The results of modeling of the stressedly-deformed state on the surface of samples at rolling in millings are given. The influence of factors of the deformation focus form and parameters of cut on the stressedly-deformed state at rolling of slugs in templets is investigated.

In clause the features of interaction mill and condition of realization process sorter rolled in the three hearth rolling of the module pеrformапсе by themselves two driving horizontal mill with a general drive and established between them no driving mill are given which, depending on the can rolling of a structure can be of vertical or horizontal execution.

The possibility of calculation of sectional areas of adsorbed on the surface of complexes in liquid cinders with formula SiO₂ — CaO at basic capacity beyond unit is shown. The calculation is carried out in the framework of the method of molecular mechanics of structure and energies of possible silicooxygen anions. The theoretical estimation of supposition about participation of cyclic anion Si₃O₉^6- and its fluorsubstituted analogs in decrease of surface tension of melted slags CaO — SiO2 — CaF2 is carried out.

The computer calculations of alternate distribution of temperatures and stresses in crystallizing round ingot with diameter 300 mm of low-carbon steel 20 are presented. There is determined the character of voltage excursion in secondary cooling zone along the length of ingot of circular section and in different cross-sections. The possibility of occurrence of asymmetry of longitudinal stresses in crosssection of ingot is theoretically shown.

The method for numerical simulation of thermostressed state of the objects of spatial configuration, moving in multizone temperature field of furnace, is offered. The three-dimensional computer calculations of the moving ingot in terms of different variants of stage heating are carried out.

On the basis of equations of Navje-Stocks t h e ^ mathematical model for calculation of trajectory of the moving in gating system non-metallic particle, which takes into account the three-dimensional character of speed field and Archimedes power. The proportion of particles, passing through the gating system in casting, is calculated by the example of different variants of gating systems by the mathematical model.

The mathematical models for calculation of stresses in chill mold, arising at its filling with melt, are offered. The possibilities of modeling of dynamics of the shaped casting mold stressed state are shown by the example of casting ''grid”, produced by casting into chill mold.

The types and conformity of existence of oxide spots on aluminium are shown in the article. The analysis of oxidation of aluminium wastes during the process of preparation of them for metallurgical redistribution is carried out.

А brief analysis of formation of the galvanic production wastes in machine-building complex of the Republic of Belarus is given.

There is shown that high-test cast iron with ball-shape graphite at casting in centrifugal way into coated chill molds has crystallization susceptibility in accordance with metastable diagram of iron-carbon alloys.

There are presented the applied technological approaches of hardening of the most loaded elements of piston and of providing of optimal heating terms of their operation, including using of inlays of Ni-resist cast iron under piston rings. The process of the preliminary heating of chill accessory is analyzed and recommendations on its realization are given.

The article is dedicated to solving of inverse problem of heat conduction. The simple procedure of searching of the heat transfer coefficients for cylindrical casting on the basis of solution of two-dimensional equation of heat transmission is offered.

The investigation results of the cast electroslag steel o /^ grade 20X13, produced by means of centrifugal casting after thermal treatment with different regimes of heating and cooling, are given. The possibility of receiving of the cast steels mechanical characteristics on the level, compared well with forged metal due to correct choice of thermotreatment regimes, in view of peculiarity of the chemical frequency and fine structure of metal, received by method of centrifugal electroslag casting, is shown.

The program ASTRA-4 with thermodynamic database is used in this work fo r thermodynamic modeling of cast alloy, received due to volume alloying by boron. The modeling was carried out by means of several calculations with following specializing of parameters with binary and ternary diagrams of systems.

Тhе influence of new technology of the porous models production of traditional wax-like smelted materials on dimensional and geometric accuracy of these models is studied.

The article is dedicated to the practical foundation of combined resources-economy technologies of the alloyed cast iron melting using wastes of galvanic productions, containing sulfates and hydroxides of these metals, instead of metallic nickel and copper.

In the article there is given the group of measures, aimed at increase of quality of cast ingots and of high-performance compounds for processing of melts on the basis of aluminium.

Тhе changings of the initial plate structure of alloy BT23 at running of high-temperature thermal treatment of large-sized slugs with heating up to 650- 950 eC and cooling on air and in water and their influence on forming of complex of mechanical characteristics are examined.

The ways of optimization of the technological factors for receiving of high-manganese steel with increased exploitation characteristics are offered. The influence of addition elements of nitrogen on the structure, mechanical and exploitation characteristics is studied.

The complex methods of investigation of heat exchange at crystallization and melting of selectively transparent materials in terms of changing of external heat influences, which include calorimetry of IK-currents, temperature taking, the heat conduction coefficient, ultrasound speed, are developed. The IK-methods of control of the melting and crystallization kinetics are approved. The data on measuring of integral current of IK-radiation, temperature, the heat conduction coefficient, ultrasound speed of the samples of working substances in terms of melting and crystallization are analysed.

The theoretical and practical aspects of logistic function in the process of purchases are examined. The methodical recommendations for determination of the insurable reserve volume are given. The practical efficiency of optimization of the insurable reserve volume is shown.

The advantages of moulding system DISA 230F (Denmark) are given. It is shown that enterprise gets economic effect from reduction of net cost of 1 tone casting of annealed and gray cast iron.

(to the 80-th anniversary).