The article presents the results of computer simulation of continuous extrusion method Conform with expanding pre-chamber array. allowing to improve the design of press tools. It is shown that the installation of the matrix within the prechamber and expanding the use of multi-channel compression greatly reduces the amount of dead zones increases the uniformity of metal flow in the deformation zone and reduces the appearance of marriage moldings. Keywords: Conform by pressing, pre-chamber matrix, computer simulation.Citation: Gorohov Y.V., Belyaev S.V., Mochalin I.V., Uskov I.V., Gubanov I.Yu., Gorokhova T.Yu., Hramtsov P.A. DEFORM-3D modeling in continuous extrusion of copper busbars for installation conform with the pre-chamber matrix,

It is known that casting long ingots of small sections (∅8–12 mm) of 01417 alloy into an electromagnetic crystallizer makes it possible to obtain a dispersed structure with insignificant intradendritic segregation. Diffusion annealing of ingots (550 °C, 4–5 h holding time) eliminates intracrystalline segregation and reduces the level of internal stresses in metal thus providing the conditions for subsequent wire drawing. The paper demonstrates that high plastic deformation of ingots without diffusion annealing can be achieved by Conform continuous extrusion, which ensures high quality and geometrical accuracy of products. The analysis of various Conform units revealed an inherent weakness – the absence of connection between the system securing the fixed part of the detachable container (shoe) and the drive wheel shaft, which leads to an increased load in the operating mode. The purpose of the work was to upgrade the Conform unit by creating a connection between the shoe and the impeller shaft to obtain a high-quality billet for subsequent wire drawing of the ∅12 mm ingot cast into the electromagnetic crystallizer. An optimal temperature of ingot extrusion (300 °С) was found to eliminate the intense adhesion of wrought metal on the tool surface. The experimental ∅5 mm rod made of 01417 alloy obtained from the ∅12 mm ingot at the Conform unit features high processing ductility. This is indicated by an increase in its yield point and relative elongation. Metallographic studies demonstrated a fine-grained structure achieved in the extruded rod, which provides the conditions for subsequent wire drawing without annealing. The results of the study provide a basis for refining the process conditions of calibrated billet production on the Conform unit followed by wire drawing with required properties.

The purpose of the work is to study the effect of styrene-acrylic polymer coatings on the change in physical, mechanical and hygienic properties of cotton fabric. Aqueous dispersions of styrene-acrylic polymers (Lacrytex 640, Akratam AS 02.1, Tubifast AS 4010) were selected as the object of study. The processing of cotton fabric was carried out by the method of impregnation with varying a concentration of the studied polymers in finishing bath from 50 g/l to 150 g/l, followed by drying and heat setting. Standardized methods for studying the properties of textile materials were applied. The effect of polymer coatings on the physical and mechanical properties of cotton fabric was evaluated by the indicators of weight gain, thickness and rigidity. The hygienic properties of treated cotton fabric were characterized by hygroscopicity and breathability. The paper presents the results of a study of the dependence of physical, mechanical and hygienic properties of cotton fabric on the type and concentration of styrene-acrylic dispersions used. According to the results of the experiment, it was found that the acrylic copolymer Lacrytex 640 increases the elastic properties of treated fabric in the entire concentration range studied. It was determined that the greatest decrease in air permeability is typical for fabric samples coated on the basis of Akratam AS 02.1 dispersion. The hygroscopicity of cotton textile material with an increase in a concentration of the studied styrene-acrylic polymer dispersions from 50 g/l to 100 g/l decreases slightly (by 2%). It is proved that the styrene-acrylic copolymer Tubifast AS 4010 due to the formation of highly elastic film provides a soft handle and high hygienic properties of cotton fabric. The obtained experimental results are of practical value in the development of new finishing compositions for textile materials.

In the 70s of the last century, Soviet scientists developed an aluminum alloy with 7% rare earth elements (REE), which at melt cooling speeds of up to 10 4 deg/s are dispersed into intermetallic phases, which significantly increase the heat resistance, corrosion resistance, and weldability of finished products for conductive material. To ensure melt cooling rates of up to 10 4 deg/s in those years, centrifugation of granules in water was used. To increase the efficiency of this redistribution, a pilot industrial line was used for continuous pellet pressing by the Conform method. A method has been developed for producing small-section billets (AE 8-12 mm) with a crushed structure from Al-REM system alloys by continuous casting in electromagnetic crystallizer (EMC) mounted at Magnetic Hydrodynamics Scientific and Production Center LLC. In this method of casting, a dispersed structure is obtained with a slight intra-dendritic segregation, which guarantees a high level of mechanical properties. A series of experiments was carried out on continuous pressing at the Conform installation of a batch of AE 12 mm rod and drawing it to AE 0.5 mm wire without annealing. To predict the properties of the wire that meet the requirements of TU 1-809-1038-2018, an experimental plan has been drawn up and implemented to determine the dependence of mechanical properties on the exposure time (τ) and the annealing temperature (t) of the wire. As a result of processing the experimental data, regression equations were obtained and graphs of the dependence temporary tensile strength (σв) and relative elongation (δ) on the temperature and holding time, which can be used when annealing AE 0.5 mm wire from 01417 alloy to obtain the required mechanical properties. Citation: Gorokhov Yu.V., Timofeev V.N., Pervukhin M.V., Belokopytov V.I., Motkov M.M., Erdineev N.B., Kosyachenko I.S., Yakunina O.Ya., Strigin A.S. Manufacturing technology of aluminium wire from alloy 01417 with adjusted level of mechanical properties,