Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-3-12
УДК 621.7
Skugorev A.V., Melnikova D.A., Stolyankov Yu.V., Yaroshenko A.S.
HEAT RESISTANCE AND TECHNOLOGICAL PLASTICITY OF AN ALLOY OF THE Fe–Cr–Al–Y SYSTEM FOR HONEYCOMB SEALS IN THE FLOW PATH OF GAS TURBINE ENGINES

The work is devoted to the study of heat resistance and technological plasticity of a new heat-resistant alloy of the Fe–Cr–Al–Y system. The alloy of the Fe–Cr–Al–Y system being developed is intended for the manufacture of honeycomb seals for the flow path of gas turbine engines with an operating temperature of up to 1100 °С. This alloy is intended to replace heat-resistant alloys ЭИ435 and ЭИ868, which are currently used for the manufacture of honeycomb seals. In terms of heat resistance at 1100 °С, the alloy of the Fe–Cr–Al–Y system is 1.5–2 times superior to alloys analogs ЭИ435 and ЭИ868.

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2.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-13-22
УДК 620.165.79
Morozova L.V., Grigorenko V.B., Terekhin A.M.
INVESTIGATION OF THE CAUSES OF CRACKS IN WELDED JOINTS OF PARTS MADE OF ALLOY HN62VMYUT-VD

The causes of cracking of the material of parts of complex configuration made of heat-resistant and heat-resistant nickel-based alloy HN62VMUT-VD (EP708) after welding are investigated. To identify the causes of cracking, mechanical tests of samples from blanks of different melts were carried out, metallographic studies of blanks and finished parts were performed. A fractographic analysis of the surface of the exposed cracks was carried out. The grain size in different zones of the workpiece is investigated. Recommendations for the prevention of cracking are given.

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3.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-23-41
УДК 667.621
Shosheva A.L.
BISMALEIMIDE RESINS (review). Part 1

The current paper is the first part of the scientific and technical review of bismaleimide (BMI) resins chemistry. This part focuses on commercially available BMI monomers, main methods of their preparation and various compositions of BMI resins. Modifications of bismaleimides with various comonomers (diamines, aminohydrazides, allyl and propenyl compounds) are shown. Strength and performance properties of bismaleimide resins are given and their main advantages and disadvantages are determined.

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4.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-42-54
УДК 678.067.5
Kurnosov A.O., Petrova A.P., Slavin A.V., Vavilova M.I., Kurshev E.V.
COMPARISON OF THE PROPERTIES OF GLASS-REINFORCED PLASTICS BASED ON POLYIMIDE BINDERS OF SOLUTION AND MELT TYPE

This article describes the features of the use of polyimide binders of solution and melt type in the manufacture of prepregs. The main physical and chemical characteristics of the solution binder of the polycondensation type brand SP-97S and the melt binder VS-51 of the polymerization type and prepregs based on them are given. The mechanical characteristics of glass-reinforced plastics were studied on the basis of binder data at room and elevated temperatures. The microstructural analysis of the surface of delamination of the samples after the compression test at temperature 20 °C was carried out by the method of scanning electron microscopy.

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5.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-55-65
УДК 541.64:539.24
Kulagina G.S., Zhelezina G.F., Shuldeshova P.M., Kurshev E.V.
STRUCTURE AND PHYSICAL-MECHANICAL PROPERTIES OF A NEW GENERATION ORGANOPLASTIC BASED ON RUSAR-NT BRAND ARAMID FIBER FABRIC AND MELT BINDER

Considered and analyzes the microstructure of an organoplastic (organotextolite) based on an aramid fabric, made from a third-generation fiber of the Rusar-NT brand, and a melted epoxy binder modified with a thermoplastic – polysulfone. The physico-mechanical properties of organoplastics are determined. It has been established that the studied organoplastic in terms of its strength characteristics and water resistance surpasses its predecessors – organoplastics based on aramid fibers of the first and second generation.

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6.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-66-75
УДК 539.231:669.859:537.622
Valeev R.A., Korolev D.V., Morgunov R.B., Piskorsky V.P.
THE EFFECT OF HIGH CONCENTRATIONS OF COBALT ON THE PROPERTIES OF MAGNETS Pr–Dy–Fe–Co–B AND Nd–Dy–Fe–Co–B

Analysis of the magnetic hysteresis loops of permanent magnets Pr–Dy–Fe–Co–B and Nd–Dy–Fe–Co–B with a high Co content allows us to conclude that with an increase in the cobalt content in the alloy, the coercive force HcI value decreases significantly. The replacement of Nd with Pr in the alloy composition leads to a decrease in the volume fraction of the main magnetic phase R2–(FeCo)14B in the composition of sintered permanent magnets, which proportionally affects the dependence of the HcI on the Co content in the permanent magnet material. This effect is presumably related to the difference in the diffusion rate in the materials under consideration.

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7.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-76-89
УДК 621.891
Sevostyanov N.V., Burkovskaya N.P.
MODERN ASPECTS TRIBOTECHNICAL MATERIALS SCIENCE OF HEAVY-LOADED DRY FRICTION UNITS THE DEVELOPMENT (review)

The methods and trends in the development of tribomaterials science to provide the properties necessary for materials of friction units of modern technology are analyzed. The following approaches are being actively developed and are being used: ceramic coatings, development of new tribotechnical alloys or modification of the structure in order to improve their functional characteristics, ceramic materials, metal-ceramic materials, chemical-thermal treatment and surface hardening. Ceramic coatings for tribotechnical purposes are mainly based on nitride systems. Active work is being carried out in the field of ceramic materials, and new materials based on ZrO2 and Si3N4 are already finding industrial application in friction units. Metal-ceramic materials have high wear resistance comparable to ceramic materials and are used in the mining and oil and gas industries. Chemical-thermal treatment makes it possible to improve the tribological properties of industrial steels and alloys.

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8.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-90-99
УДК 621.762
Kashin D.S., Azarovskiy E.N.
POWDER CHROMIUM PLATING AND CROMIUM ALUMINIZING OF NICKEL ALLOY SURFACE

Investigations of the surface of a nickel alloy after the penetration of diffusion coatings from powders were carried out. Application of chrome and chromoaluminide screens on atmospheric devices according to the parameters of the temperature-time interval. Determining the values of change in the mass of samples and the degree of diffusion of the surface. Given metallographicl and X-ray microspectral analysis of samples. According to the research results, it was found that after powder chromium plating, the depth of the diffusion zone reaches 18 microns with a chromium concentration of up to 92 %. With the appearance of chromoaluminide surfaces, aluminization mainly takes place, while the diffusion of chromium and iron is not observed.

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9.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-100-115
УДК 629.7.023
Druzhnova Ya.S.
DEVELOPMENT OF METHODS FOR THERMAL SPRAYING OF HARDENING TIRES BASED ON TUNGSTEN AND CHROMIUM CARBIDES (review)

Considers the trend of replacing galvanic chromium plating, used to protect steel parts from corrosion and wear, by gas-thermal coating methods using composite powders based on tungsten and chromium carbides. Varieties of thermal spraying, methods for manufacturing composite powders are considered, their advantages and disadvantages are described. It has been established that the most common method of applying wear-corrosion-resistant coatings is the high-velocity oxygen fuel spraying method. The example shows the superiority of such a coating compared to galvanic chromium plating. The direction of development in the field of manufacturing composite powders with the necessary technological properties to obtain wear-corrosion-resistant coatings with optimal characteristics is indicated.

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10.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-116-127
УДК 675.043.42
Kulichkova S.I., Golovkov A.N., Kudinov I.I., Skorobogatko D.S.
EVALUATION OF THE EFFECTIVENESS OF VARIOUS METHODS OF APPLYING POWDER DEVELOPERS DURING CAPILLARY CONTROL

Analyzes the effectiveness of various methods of applying a powder developer included in a penetrant materials with level I sensitivity for automated penetrant testing. The technologies of penetrant testing with the application of a powder developer using the electrostatic spraying unit and the automatic storm-camera. The results of comparative tests of two technologies on samples with low-cycle fatigue cracks of various sizes are presented, as well as a graph of the probability of detecting a defect characterizing a specific control technology.

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11.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-128-139
УДК 621.763
Butakov V.V., Lugovoy A.A., Varrik N.M., Babashov V.G.
SIMULATION OF THE PROPAGATION OF A HEAT FRONT THROUGH A SAMPLE OF A MULTILAYER THERMAL INSULATION MATERIAL UNDER CONDITIONS OF NON-STATIONARY HEAT FLOW

An urgent task for developers of heat-protective materials is to create methods for a comprehensive assessment of the complex of their key properties that reliably ensure their operation under operating conditions. The purpose of this study is to evaluate the properties of a layered heat-shielding material sufficient to simulate the propagation of a heat front through a sample under conditions of non-stationary heat flow. Work has been carried out to evaluate a set of thermophysical properties of the material sufficient to construct a model of the propagation of a thermal front through a sample under unilateral heating. A model of the passage of the heat front through the material has been created. The work on the numerical evaluation of the thermal conductivity coefficient and the heat transfer coefficient on the front sides of the multilayer sample was carried out.

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12.
dx.doi.org/ 10.18577/2307-6046-2022-0-10-140-148
УДК 543.51; 669.1
Karachevtsev F.N., Eroshkin S.G., Gorbovets M.A.
DEVELOPMENT OF THE PRODUCTION OF STANDARD SAMPLES OF THE COMPOSITION OF ALLOYS AT THE NATIONAL RESEARCH CENTER «KURCHATOV INSTITUTE» – VIAM

The results of the production of standard samples of the composition of alloys on various bases for spectral analysis are given, as well as a list of standard samples developed over the past 10 years. The technologies for manufacturing standard samples homogeneous in chemical composition are shown, which provide the requirements for the material of standard samples. The capabilities of the National Research Center "Kurchatov Institute" - VIAM for the development and production of reference materials are presented, directions for the development of the production of reference materials are indicated.

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13.
CONTENТS

Heat-resistant alloys and steels

 

Skugorev A.V., Melnikova D.A., Stolyankov Yu.V., Yaroshenko A.S. Heat resistance and technological plasticity of an alloy of the Fe–Cr–Al–Y system for honeycomb seals in the flow path of gas turbine engines

 

 

Morozova L.V., Grigorenko V.B., Terekhin A.M. Investigation of the causes of cracks in welded joints of parts made of alloy HN62VMYUT-VD

 

Polymer materials

 

Shosheva A.L. Bismaleimide resins (review). Part 1

 

Composite materials

 

Kurnosov A.O., Petrova A.P., Slavin A.V., Vavilova M.I., Kurshev Е.V. Comparison of the properties of glass-reinforced plastics based on polyimide binders of solution and melt type

 

Kulagina G.S., Zhelezina G.F., Shuldeshova P.M., Kurshev E.V. Structure and physical-mechanical properties of a new generation organoplastic based on Rusar-NT brand aramid fiber fabric and melt binder

 

 

Valeev R.A., Korolev D.V., Morgunov R.B., Piskorsky V.P. The effect of high concentrations of cobalt on the properties of magnets
Pr–Dy–Fe–Co–B and Nd–Dy–Fe–Co–B.

 

Sevostyanov N.V., Burkovskaya N.P. Modern aspects tribotechnical materials science of heavy-loaded dry friction units the development (review)

Protective and functional

coatings

 

Kashin D.S., Azarovskiy E.N. Powder chromium plating and cromium aluminizing of nickel alloy surface

 

Druzhnova Ya.S. Development of methods for thermal spraying of hardening tires based on tungsten and chromium carbides (review)

 

Material tests

 

Kulichkova S.I., Golovkov A.N., Kudinov I.I., Skorobogatko D.S. Evaluation of the effectiveness of various methods of applying powder developers during capillary control

 

 

Butakov V.V., Lugovoy A.A., Varrik N.M.,Babashov V.G. Simulation of the propagation of a heat front through a sample of a multilayer thermal insulation material under conditions of non-stationary heat flow

 

 

Karachevtsev F.N., Eroshkin S.G., Gorbovets M.A. Development of the production of standard samples of the composition of alloys at the National Research Center «Kurchatov Institute» – VIAM

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