Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-1-1
УДК 620.1:669.018.44
Prager S.M., Solodova T.V., Tatarenko O.Yu.
Research of mechanical properties and microstructure of samples obtained by SLS from metal powder composition of VZh159 alloy
The article shows the research of mechanical properties of specimens obtained by SLS frommetal powder composition of VGH159 alloy after long-term exposure at working temperatures. It has been shown that strength properties don’t decrease essentially after 500-hour exposure at 900С and plasticity reduction of the material have induced by the additional precipitation of phases with Cr and Mo and y'-phase from the solid solution. The comparison of the mechanical properties with passport characteristics of EP648-PS alloy have carried out. It was shown that VZh159 alloy surpasses that alloy in tensile strength at investigated temperature diapason.
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2.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-2-2
УДК 669.15-194.55
Gromov V.I., N.A. Yakusheva, Polunov I.L.
Evaluation of the effect of heat treatment on mechanical properties of maraging steels in the alloying system Fe–Ni–Mo–Ti–Al
Studied the characteristics of the mechanical properties of maraging steels in the alloying system Fe–Ni–Mo–Ti–Al, wherein the content of Ti after different heat treatment. Determined the technological parameters of aging, providing an optimal combination of strength properties of steels and their level of impact strength. Given microstructure steels under different heat treatment conditions. Described the dependences of mechanical properties from the cross-sectional dimensions of rods. Studied the influence of titanium on the mechanical properties of steels.
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3.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-3-3
УДК 621.762
Nekrasov B.R., Vydumkina S.V., Yu.V. Stolyankov, E.V. Filonova, Chebotareva Е.S.
Technological features of manufacture of granules of die chromium alloy
The article discusses the technological features of manufacturing chromium alloy, the manufacture of granules with the plasma rotary atomization for the purpose of further compaction. Influence of the content of refractory elements in the alloy, the particle size and morphology of granules. In addition to the base composition containing 30% molybdenum and 5% iron was studied compositions with increased content of molybdenum and addition of tungsten. Сhromium alloy designed for the manufacture of die tooling capable of operating at temperatures above 1100°C.
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4.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-4-4
УДК 621.318.1
Cherednichenko I.V., Y.A. Bondarenko, Kolodiazniy M.Yu., N.A. Kuzmina, Shubakov V.S., Zhukov D.G.
The structure and properties of permanent magnetic alloys UNDK25BA, manufacturing by directional solidification methods with liquid metal cooler
Influence of direct crystallizations parameters for crystalline structure, structure of high coercive station and magnetic properties permanent magnetic alloys UNDK25BA with niobium, silicon and sulfur has been investigated. It is established that UNDK25BA alloys have tendency to formation of a regular crystal structures (column or single-crystal); there is an opportunity to make such magnets on the equipment UVNS-5 intended for smelting of shovels for gas-turbine engines. The contains providing the greatest magnetic properties exceeding requirements of GOST 17809–72 and the level of foreign analogs are defined.
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5.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-5-5
УДК 621.762
Alishin M.I., Knyazev A. E.
Production of metal-powder high-purity titanium alloy compositions by induction gas atomization for application in additive manufacturing
The issue of production of high-purity metal-powder compositions (powder) of titanium alloys by the method of induction gas atomization is reviewed in the article. With this method of production of titanium powders required technological properties and granulometric composition are improved with low content of gas impurities, which meets the requirements for raw materials for additive technologies. In FSUE «VIAM» the VIPiGR 50/500 unit operated with the method of induction gas atomization and allowing to obtain titanium powders with a low content of oxygen impurities (not more than 0,15% by weight) and hydrogen (not more than 0,01% by weight) was installed and commissioned in operation. The main characteristics of metal powder complexes from alloys of high-purity Ti-4-6 and VT20 obtained on the unit are presented.
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6.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-6-6
УДК 621.762
Knyazev A. E., S.V. Nerush, Alishin M.I., Kuko I.S.
Researches of the technological properties of metal-powder compositions of VT6 and VT20 titanium alloys obtained by induction melting and gas atomization
This article presents the researches of the technological properties of metal-powder compositions of VT6 and VT20 titanium alloys obtained by induction melting and gas atomization. Researches of chemical composition, gas porosity, surface morphology and other technological properties of metal-powder compositions of VT6 and VT20 titanium alloys were conducted. Work is performed within development of technology of receiving the fine-dispersed of metal-powder compositions of VT6 and VT20 titanium alloys for enhancing of their use in the additive technologies.
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7.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-7-7
УДК 6778.8
G.N. Petrova, S.A. Larionov, A.E. Sorokin, Sapego Yu. A.
Modern ways of processing of thermoplastics
Article is devoted to innovative manufacturing techniques of products from polymeric materials – to the additive FDM and SLS technologies implemented now in VIAM Federal State Unitary Enterprise. Their advantages and shortcomings are shown, optimum conditions of use are given. Properties of the thermoplastic compositions developed for application in the FDM and SLS technologies are given. It is established that properties of the samples made on the additive FDM and SLS technologies of developed the thermoplastic compositions, are at one level with properties of the samples received in the traditional way of pressure casting, and do not concede to foreign analogs.
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8.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-8-8
УДК 678.8
P.N. Timoshkov, A.V. Khrulkov
Analysis of continuously reinforced polymer composites production methods using out-of-autoclave technologies (review)
The main non-autoclave technologies for the production of parts made of polymer composite materials (PCM) based on glass and carbon fillers and melt thermosetting binders for use in the aviation and automotive industry, as well as their advantages and disadvantages are considered. Basic schemes of assembling packages for various types of molding are presented, with the use of appropriate equipment and hardware design.
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9.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-9-9
УДК 669.018.95
Kurbatkina E.I., A.A. Shavnev, Kosolapov D.V., Gololobov A.V.
Features of thermal processing of composite materials with the aluminium matrix (review)
In this article, main features of the dispersion hardening of metal composite materials (MМС) based on an aluminum matrix were considered using the example of the Al–Cu–Mg–SiC, Al–Mg–Si–Cu–SiC, Al–Mg–Si–Cu–B4C and Al–Zn–Mg–Cu–SiC systems. It was shown that the aging kinetics of MMC differs from the aging kinetics of aluminum alloys: hardness and strength of MMC reach their maximum values in a shorter time. The effect of the volume fraction of the reinforcing component on the dispersion hardening of composite materials was analyzed. Рhase composition and features of the interaction at the matrix/reinforcement interface were studied.
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10.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-10-10
УДК 678.8:620.1
Nistratov A.V., Vu Kim Long, Klushin V.N.
Thermographic analysis of waste carbon- and organic plastics as way of evaluation of rational conditions of their destruction
The thermal decomposition of samples of several carbon- and organic plastics in atmosphere of nitrogen and air was studied using thermographic method. Characteristics of mass loss and thermal transitions of the materials were revealed when heated. It is established, that binding of carbon plastics is destroyed by heating at ~300–410°C, and their pyrolysis in contrast to incineration retains exteriorly individual carbon fibers. Adhesive of organic plastics decomposes at ~390°C, and their fibers become carbonized or fade/oxidize. The rational parameters of thermal treatment of studied samples composits were grounded, providing the ability to extract from they secondary fibers or to produce carbonized materials, requiring study of their properties as adsorbents.
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11.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-11-11
УДК 669.017
Dermel I.V.
Peculiarities of magnetron sputtering of metals in the presence of reactive gases
In this article, peculiarities of magnetron sputtering of metals and semiconductors in the presence of reactive gases are discussed. Aluminum, titanium, and silicon targets were used. Oxygen and atmospheric air dissolved in argon were used as reactive gases. An influence of oxygen and atmospheric fractions in the gas mixture on the discharge voltage and oxides’ deposition rate during sputtering was investigated.
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12.
dx.doi.org/ 10.18577/2307-6046-2017-0-11-12-12
УДК 620.1
Varchenko E.A.
Natural tests of metal materials in sea water: key approaches to estimation of resistance to corrosion and biodeterioration
The paper covers the problems of methodological support in the part of assessing the resistance to corrosion and biofouling of metallic materials during full-scale marine tests, as well as a review of the research work of the GCTC VIAM, aimed at developing, improving, clarifying and supplementing the methods of marine testing. Attention is focused on the impact of ecological and biological aspects on complex technical systems and the need for testing materials for biological resistance as an integral part of climate testing.
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