It is shown that modern industrial modifiers of silumin eutectic contribute to the saturation of the melt with hydrogen. Its micro bubbles block the branching of eutectic crystals and promote the formation of gas porosity in castings.

To improve the efficiency of the process of modifying the eutectic and reduce the gas porosity, a method of hereditary modification is proposed. A special technology has been developed to solve the problem of modification of silumin eutectic.

The technologies of molding from cold-hardening mixtures based on organic resins and inorganic metal phosphate binders are compared. The use of the latter is preferable for a number of technological indicators. Also, without additional investments, the problem of labor and environmental protection is completely solved.

The review describes two possible prototypes of so-called nature-like technologies of foundry production. For casting on ice patterns, mineral components are used in the manufacture of shell sand molds, and the pattern is removed from the mold by melting and naturally filtering its melt through a porous sand mixture of the mold that cures to the depth of filtration by hydration of the gypsum and cement mixed into the mixture. Also, the possibilities of constructing thin-walled castings similar to natural structures are described.

The article is devoted to the problem of processing dispersed metal wastes, generated at machine-building enterprises. The proposed solution of the problem is recycling in rotary tilting furnaces (RTF) with the production of high-quality charge materials (charge ingots) or foundry alloys directly at the enterprises where these wastes are formed. The results of experimental meltings of gray iron in induction crucible furnace with the replacement of traditional charge materials with ingots, obtained from chips, scale, sludge, etc. in the RTF are presented.

The mechanism of the formation of veinings on cast iron castings whose cores are made of a cold-hardening mixture is studied. It is shown that the cause of the formation of the veinings are the stresses in the surface layer of the core that arise when a-quartz is converted to a-tridymite. The possibility of reducing the number and size of veinings due to the selection of the composition of paints and the thickness of their layer on the surface of the rods was tested.

Lead-containing wastes amount to more than half of the waste of non-ferrous metals formed in Belarus. At the same these wastes are the least studied and the most toxic of the metal wastes. The bulk of them consists of lead-acid batteries, 50–60% of the mass of which is oxide-sulphate lead paste. The article presents the results of a study of the composition and properties of characteristic lead-containing wastes generated both in the operation of lead-containing products and in the production of lead (slag, dust aspiration, etc.). Obtained data allow to optimize the technological regimes of processing of wastes: consumption of fluxes and temperature – time regime of the lead melting.

The methods of electrophysical influence on the structure of silicate binders and liquid-glass mixtures to improve their properties are generalized. Methods of influence such as ultrasonic, magnetic, electric and electrohydraulic are considered. Of great interest are The possibilities of combining physical and chemical methods of modification of liquid glass are lucrative ones. Application of electrophysical methods of influence allows to reduce quantity of expensive and scarce binding materials, to increase labor productivity at mixed preparation sites and at production of forms and cores shops. The electrophysical methods allow to reduce duration of preparation of silicate binding materials.

The functions of the temperature distribution density of the detail on the basis of the results of numerical simulation of the heating process are calculated. Characteristics of the temperature distribution function of the detail for analysis of the level of formation of thermal stresses are proposed. It was shown that the difference between the maximum and minimum temperatures of the detail varies nonlinearly with the time of heating the detail in the furnace. The method for formalizing numerical simulation data for selecting the best thermal modes for heating details is proposed.

Over the past decades, the world’s steel industry has implemented two areas of its development: construction and commissioning of modern mini-plants; modernization of enterprises with a full metallurgical cycle. Despite a number of advantages of mini-plants, the global growth of steel production since 2000 has been largely due to the construction and commissioning of Converter production in China. The article presents data on the development and restructuring of metallurgical enterprises with a full cycle, primarily in the conditions of ferrous metallurgy of the CIS and former USSR. The main technological equipment for metallurgical processing, including the production of iron, steel, blanks, finished products, as well as the volume of production per year for the leading enterprises of the CIS and the former USSR was described in the article.

It is also noted that in connection with the annual re-equipment of the production capacity of the main workshops in the steel industry of the former USSR, the training of highly qualified engineers and workers was the most important task of the state.

Currently, various manufacturers in the manufacture of wire RML used planish-straightening device (PSD), to obtain stable mechanical and plastic properties of the wire. The ensuring of the necessary parameters of mechanical and plastic properties of the RML wire is actual for OJSC «BSW» – Belarusian Metallurgical Works – Management Company of the Holding «BMC». That is why its own design of PSD was developed at BSW. The new planish-straightening device allowed to solve several problems simultaneously: to increase the plastic characteristics of the wire, to improve the adjustment of the coil lifting and to stabilize the diameter of the wire ring PML when working on the mills.

The quality of the drawing tool depends on the quality of the channel. Channel processing is carried out in order to obtain the desired geometric shape, required size and limit deviations in accordance with the size and quality of the wire stretched, as well as to obtain the required purity of the surface of the channel drawing. The determination of the surface roughness in the die channel is not possible due to the design of the die, so the quality control of the channel polishing is carried out by a visual method using a stereoscopic microscope.

In the laboratories at the Central laboratory of OJSC «BSW – Management Company of Holding «BMC» the experience was undertaken for the determination of the roughness parameter in the channel of the dies by the method of destructive testing. The results obtained show that the visual method of quality control of the working channel polishing of the carbide drawing tool with the help of a stereoscopic microscope provides sufficient accuracy of assessing the quality of the roughness of the surface of the working channel when monitoring the draw die intended for coarse-medium and thin drawing.

The article presents the order of operation and the principle of operation of the measuring device ribs. The device is used to determine the geometric parameters of the ribbed bars. The principle of its operation is based on the optical examination of the object with the help of video cameras and transfer of output information on the computer monitor.

The main parameters affecting the cobalt content in the brass coating are determined, the chemical composition of the coating and the cobalt content in the coating thickness are investigated. Cobalt was applied to the brass coating from a separate bath. The sequence of application is as follows: Cu+Zn+Co. Copper coating was applied only from the electrolyte of alkaline copper plating.

The article presents the working procedure for the camera of artificial climate type 2 X-5655-PAGE of the company «MONTAGNE». Accelerated corrosion tests in the camera make it possible to determine the ability of finished supplied products to maintain theirs properties during transportation, processing, long-term storage, as well as additional research tests in the conditions of artificial aging at the consumer, to develop methods of corrosion protection and improve the quality and competitiveness of products.

In the pipe-rolling shop, on the site of preparation of mandrels and disc saws were the centerless turning and grinding complex VT-8 «Hetran» for repair of mandrels are used, studies have been conducted to test experienced grinding belts. The choice was based on a comparative analysis of the work of experienced grinding belts with usual industrial grinding belts. The resistance of grinding belts for one mandrel is calculated. A positive result (economic effect) was obtained by using experienced grinding belts.

The coatings based on silicides of various metals are widely used in various industries by vacuum-plasma processes for products treatment. The quality of such coatings is determined by the degree of chemical purity of the target cathode, the correct choice of a mixture of process gases and the level of accelerating potential supplied to the substrate. Traditional methods for producing multi-component targets have a number of disadvantages, such as: high residual porosity, excess content of impurities, as well as the need for expensive equipment.

The use of casting technologies in the production of target cathodes is promising. The paper presents the generalized results of experimental studies of manufacturing target cathodes for vacuum ion-plasma sources by methods of reduction and high-speed induction melting. Silicides of titanium, copper and nickel were used as the material.

The structure, phase composition and tribotechnical properties of the impeller casting for oil and centrifugal pumps made from high-chromium steel 20Cr15Mn3, obtained by the technology of precise casting, were studied. It was concluded that impeller casting made from high-chromium steel 20Cr15Mn3, obtained by the technology of exact casting of Sol-Gel in ceramic molds, had improved properties and can serve as a replacement for the traditionally used material – cast iron.

It is established that inclusion of the modifier into the electrode coating allowed to change the grains of the weld metal from 20–60 to 10–30 mm, to change its morphology and to improve the welding-technological properties of the coated electrode. It is shown that the modifying additive introduced into the coating of a welding electrode containing ultrafine particles in an amount of 1% of the weight of the dry charge had not deteriorated the technological parameters during manufacture, and the integral index of the different thickness (Desp) of electrodes with standard and experimental coatings did not add to the accepted value of 0.05. This indicates that the quality of the lubricating mass, its properties, the stability of the mass flow from the spinneret are satisfactory for both batches.

The conditions of formation of the nanocrystal state of the structure in carbon steels are considered in the article. The methods of research and experimental data on the microstructural structure of the strengthened parts of the working bodies of agricultural machinery made from carbon steels of the lowered hardenability are given. It is shown that pulsed quenching and low tempering provides of steel products with fragmented nanocrystal structure of the martensite. Fragmentation of martensite grains in carbon structural steels during heat treatment of parts significantly increases their mechanical characteristics.

New compositions of tool steels of increased wear resistance for manufacturing tools of various purposes are considered. The results of this work can be used in the manufacture of cold and hot forming molds and working parts of die casting molds of aluminum and copper alloys, as well as in the manufacture of cutting tools for woodworking and even for plastics molding. In every case you selection of the steels depends on the purpose of use and the required operational life of the tool.