An important prerequisite for high-performance stainless steel VNS-65 (18Cr13Ni4Co4Si2NMo3) is a high purity non-metallic inclusions – oxides and sulfides, no more than 1 point in accordance with GOST 1778–70. The existing steel smelting technology VNS-65 outdoor furnace followed by electroslag remelting is not always provides the desired purity of the metal, resulting in a high-level properties of instability. To reduce the amount of nonmetallic inclusions is necessary to reduce to 2–3 times the oxygen content (less than 0,01%) and sulfur (less than 0,005%). The aim of the study is to develop a technology of steel smelting VNS-65, providing the reduction of non-metallic inclusions, improved stability properties through the use of new refining slag mixtures and technology microalloying rare earth metals, administered through the slag. The work within the framework of an integrated research area 8.2. «High-strength and corrosion-resistant welded structural steel with high fracture toug

The foundry characteristics of the VTI-4 intermetallic alloy have been determined for a vacuum arc furnace with a centrifugal casting of the melt into ceramic or metallic forms. It has been found that the VTI-4 intermetallic alloy has low casting characteristics in comparison with the VT5L alloy and Ti–16Al intermetallic alloy (mass. %): 40% more shrinkage, 44% less fluidity and 26–28% less fillability of the mold. The obtained casting characteristics of VTI-4 alloy can be used to develop an experimental foundry technology for the production of parts from it. The obtained casting characteristics of VTI-4 alloy can be used to develop an experimental foundry technology for the production of parts from it сomplex direction 7.1. «Intermetallic titanium alloys» («The strategic directions of development of materials and technologies of their processing for the period till 2030») [1]. The main trends and prospects in the field of development of new ortho alloys and technologies for their pr

We studied the temperature field and stress determine the chemical composition, structure and mechanical properties of welded joints of heat-resistant nickel-based alloys after electron beam welding. The work is executed within the frames of the complex scientific direction 10.8. «Fusion welding technologies of new structural materials» («The strategic direction of development of materials and technologies of their processing for the period till 2030»)

Creation of high-temperature high-porous ceramic materials is one of actual problems now. The oxide porous ceramics has low heat conductivity, high resistance to oxidation and satisfactory durability therefore it is especially demanded in the metallurgical foundry fields of the industry as foam ceramic filters. The results of researches of sintering mullite porous ceramics with use of discrete mullite fibers are presented in this article. It is shown that the optimum range of temperatures of calcining for producing materials with open cellular porous structure is 1300–1350°C. It is determined that the essential role on mechanical characteristics of materials is rendered by the mode of preliminary heat treatment of fibers, and also composition of the sintering aid. Materials with the reported porosity to 85% and durability are produced at compression to 0,7 MPa.

Titan and titanium alloys are very attractive materials for perspective fields of application due to their properties: low density, high mechanical properties, corrosion resistance. Further improvement is necessary to increase their competitiveness compared to high-strength steels or Ni-alloys. One of the ways to enhance titanium alloys is to use them as a matrix in fiber-reinforced composites. Fiber- reinforced titanium matrix composites have very good mechanical properties, but costs of their production are often higher, than production of standart materials. However usege of these materials in aircraft manufacturing (jet engines and fuselage) and automotive industry is growing rapidly.

Methods of spectral analysis are widely used on the production of aluminum alloys to determine the chemical composition of the melted material. For calibration of spectrometres are used certified reference materials (CRMs) of alloy composition. Uncertainty of certified values of CRM significantly affect on the accuracy of quantitative analysis. The uncertainty of the inhomogeneity of CRM is one of the total uncertainty of CRM certified value is. FSUE «VIAM» develops and produces certified reference materials. In this work we present the results of a study of the material composition of the alloy blanks CRM D16 melted on two different technologies. According to the research selected the technology that provides the best performance of the material CRM. Carry out the chemical analysis of CRM

Article is devoted to questions of decrease in negative noise impact on the person on urban area and industrial rooms. For the solution of the described problem the composition decorative sound absorbing panel, for application as a part of transport shumozashchitny screens and in industrial rooms is offered. The structure of the panel representing layer of fibrous material, located in layer of cellular structure that allows to combine the high acoustic characteristics inherent to fibrous materials, at considerable improvement of rather fibrous materials of utilization properties is described.

Bismaleimide binder was developed with high resistance to water. Using a part of the binder allyl and propenyl hardener yielded net structurally elasticized co-polyimide. The choice of a ratio of components, the use of active diluents, the variation in time of synthesis allowed to obtain without solvent of bismaleimide binder composition for the manufacture of composite materials with operating temperature up to 200°C in a humid environment.

Complex research of the reasons of operational destruction of boards of generators from AL9 and VAL8 aluminum alloys is conducted. Methods of optical and electron microscopy, x-ray microanalysis and chemical analysis is evaluated microstructure, chemical composition and nature of destruction of details is studied. It is established that destruction of details has occurred at action of single static load (hydraulic shock). Destruction was promoted by lack of radius of transition in place of change of thickness and the raised level of porosity in generator board from AL9 alloy.

The research of Ni–Al alloy and Co–Cr–Al–Ni–Y alloy are provided. Those alloys has tendency to the cold brittleness at the room temperature. The alloy of Ni–Al system and alloy of Co–Cr–Al–Ni–Y system were produced by the technique of electro-magnetic field treatment during equiaxal solidification. It is shown that Ni–Al alloy and Co–Cr–Al–Ni–Y alloy after the electro-magnetic field treatment of liquid metal during crystallization process the size of constituents are decreasing. In addition, the formation of crystallographic texture for researched alloys is detected. For Ni–Al alloy the linear dependence of impact hardness growth on increase of electro-magnetic field induction is identified. It is shown that using of the electro-magnetic field treatment at the crystallization process lead to significantly reduction of the weight loss after heat resistance testing for Ni–Al alloy samples. In addition, the change of phase structure of Ni–Al alloy which produced by electro-magnetic field

The dependence of the damping ability of the thickness of new developed coatings system Al–Ni–Y during the vibration in the first bending form the resonance with the same amplitude of the exciting force corresponding to a stress of 70 MPa in the threat section. We investigated the surface roughness of titanium alloy VT6 after application of the damping coating. Investigated the erosion resistance of the new developed coatings system Al–Ni–Y, and the damping ability after exposure to the abrasive stream. Work was performed within the framework of strategic directions 17. «Comprehensive anticorrosion protection, hardening, wear-resistant protective and heat-resistant coating», сomplex problem 17.3. «Multilayer heat-resistant and heat-resistant coating, nanostructural hardening of erosion and corrosion-resistant, wear-resistant, antifatigue coating to protect parts hot gas path and compressor of GTE and GTU» («The strategic directions of development of materials and technologies of th

Currently nickel alloys are widely used in modern aviation industry and engine building. They are made of critical parts with thermal and power load. An important task is to control the chemical composition of nickel alloys, especially the content of trace. In this work determination of B, Si, P, Mn, Fe, Cu, As, Se, Sn, Sb, Pb and Bi in the certified standard samples of nickel alloys by a mass spectrometry method with inductively coupled plasma and laser ablation (ICP-MS-LA). The technique of preparation of test for the analysis is given. The results are compared with the results of the analysis of the classical method of ICP-MS. The detection limits are as follows: the range of detectable concentrations 0,00002–2,2% (by weight), relative standard deviation is less than 0,07.