Materials science
Effect of hardening heat treatment and chemical-thermal treatment on the structure and wear resistance of VT22 titanium alloy
S.V. Skvortsova, G.T. Zainetdinova, S.M. Sarychev, G.V. Gurtovaya, A.A. Ryabov
The work studies the effect of quenching temperature and aging parameters on the formation of the structure and hardness of titanium alloy VT22. The effect of temperature and holding time during vacuum ion-plasma nitriding on the structure and microhardness of samples preliminarily subjected to hardening heat treatment according to the recommended mode is studied. Optimal modes of strengthening heat treatment and vacuum ion-plasma nitriding for alloy VT22 are determined, allowing to increase the base hardness to 49-50 HRC units, and the surface microhardness to 770 HV0.05
Keywords: titanium alloys, hardening, heat treatment, chemical-thermal treatment, ion-vacuum nitriding, microhardness, wear resistance.
Results of comparative corrosion tests of PT-3V alloy specimens, manufactured by dmd method, and industry-manufactured semi-finished products
O.A. Bykh, P.V. Tryaev, R.A. Vlasov, А.V. Ershova, S.N. Pichkov
The article presents the results of comparative tests for resistance to hot salt corrosion of PT-3V alloy samples, cut from a bar and a forging, made by the traditional method, and obtained by the additive DMD method. The linear dimensions of corrosion damages on DMD samples are greater than those on rod samples, and the depth of corrosion damages on both types of samples is commensurate. Samples manufactured by the DMD method showed resistance to corrosion cracking when exposed to NaCl solution with a concentration of 30 g/l at 200 °C under static load for 600 hours. The manufacture of products from PT-3V by the DMD method will ensure their high corrosion resistance in corrosive working environments (crystalline halides, their aqueous solutions), commensurate with the corrosion resistance of articles manufactured from industrial semi-finished products made of PT-3V alloy.
Keywords: titanium alloy, hot salt corrosion, additive technologies, DMD method, corrosion damages, pitting corrosion, stress corrosion cracking.
Research of molding mixtures and molds for the production of large titanium castings
M.N. Saubanov
The article presents the results of study of various refractory periclase powders for molds and cores used for the production of titanium castings. The action of firing temperature on physical and mechanical properties of periclase molds has been specified. The analysis of chemical processes occurring during heating and baking of rammed periclase mixtures has been carried out. The tailored grain size and chemical composition of molding periclase has been chosen for the production of high-quality titanium castings.
Keywords: High-temperature magnesite calcination, hydration of periclase mixture, silica gel, carbonization of periclase mixture, shrinkage.
Influence of scanning speed and laser power on the properties of AlSi10Mg and 12Kh18N10T powder materials obtained by selective laser melting
D.A. Boshkanets
The article considers the production of AlSi10Mg and 12Kh18N10T powder materials by selective laser melting (SLM) technology. The regularities of scanning speed (V) and laser power (P) on the structure and properties of these powder materials have been established; the optimal values of these parameters have been determined. The higher material density provides its increased mechanical properties was revealed. A 3D spline model of the dependence of stress (Q) and strain was created. Recommended V/P ratios have been derived.
Keywords: powder metallurgy, selective laser melting, steel, aluminum alloys, structure, properties, multi-criteria optimization.
Study of titanium alloys at low temperatures and the influence of thermal hydrogen treatment on the endurance limit
S.V. Serikov
Using the example of titanium alloys Ti-5Al-2.5Sn ELI, Ti-5Al-2.5Zr ELI, Ti-6Al-4V ELI, the nature of the change in the level of endurance limit of the materials under consideration with decreasing test temperature is shown. Thermal hydrogen treatment increases the endurance limit of VT5L, VT6L alloys to a certain percentage saturation with hydrogen. Here, the promisingness of the computational and experimental method for identifying metals with respect to operational reliability is once again demonstrated.
Keywords: genome-forming matrix, endurance limit, specific energy of destruction, deformation rate, temperature.
MANUFACTURING TECHNOLOGIES
COMMERCIAL IMPLEMENTATION OF RESOURCE SAVING TECHNOLOGY FOR MAKING TITANIUM INGOTS AND FORGINGS WITH EXPANDED USE OF SECONDARY TITANIUM
V.P. Leonov, I.A Schastlivaya, R.E. Saznov, A.L. Yakovlev, D.A. Schevchenko
Research was conducted on the quality of ingots and forged semi-finished products made of titanium alloys VT1-0, 3M, PT-3V grades, manufactured by the method of electron beam melting with an intermediate tank according to the EBM (electron beam melting) and VAR (vacuum arc remelting) scheme based on charge materials with 100 % involvement of titanium waste.
Keywords: ingot, forging, titanium alloys, electron beam melting, secondary titanium.
EXPERIENCE OF CMP, JSC IN THE PRODUCTION OF SMALL-SIZED INGOT OF INTERMETALLIC TITANIUM ALLOY VIT1 GRADE
A.V. Aleхandrov, A.G. Ziganshin, R.S. Konshin, S.A. Pozdeev
Chepetsk Mechanical Plant, JSC produced a small-sized ingot weighing 314.0 kg with a diameter of 300 mm from a high-heat-resistant alloy of VIT1 grade on the basis of titanium intermetallides by four vacuum-arc remelts, including garnish melting, to produce an experimental batch of bars. The chemical composition of the ingot corresponded to the requirements of TU 404-2015. The report reflects the main results of the performed work, presents the actual chemical composition of the ingot and statistical processing of the obtained data.
Keywords: titanium intermetallides, VIT1 alloy, ingot, vacuum-arc remelting, garnish melting, chemical composition, statistical analysis.
APPLICATION. QUALITY. MARKET
EXPLORATION OF THE ANTIFRICTION COATING CHARACTERISTICS OF TITANIUM WHEEL ELEMENTS OF A PROMISING LUNAR ROVER
E.V. Rykov, A.O. Shtokal, A.A. Zhukov, V.K.Shatalov
Increased requirements for wear resistance and stability of the friction coefficient of wheels of a prospective lunar rover operating under conditions of abrasive impact of lunar soil are substantiated. The necessity to use special coatings on the grousers to reduce the abrasive effects of lunar dust and increase their wear resistance is indicated. Experimental data on the coefficient of friction and wear resistance of the MAO coating on the ВТ4 titanium alloy are presented. Based on the conducted research, recommendations were developed for the design of wear-resistant wheels with increased flotation for the lunar rover of a prospective lunar base.
Keywords: lunar rover, grousers, microarc oxidation, friction coefficient, wear resistance, titanium alloy.
CURRENT RESEARCH TRENDS FOR TITANIUM ALLOYS IN THE LIGHT OF THE IMPLEMENTATION OF PRIORITIES AREA OF SCIENTIFIC AND TECHNOLOGICAL DEVELOPMENT
Y.N. Kusakina, N.V. Ruchina
The paper considers various areas of scientific research aimed at improving the properties of titanium alloy products. These areas correspond to the key trends outlined in the strategy of scientific and technological development of the Russian Federation, especially in the areas of advanced technologies for designing and creating high-tech products, technologies for creating new materials with specified properties and performance characteristics. Such critical technologies as biomedical technologies for healthy and active longevity, technologies for the development of new-generation medical devices are reflected in the developments of Russian scientists of new medical devices made of titanium alloys and technologies for their production and processing.
Keywords: titanium alloys, priority areas of scientific and technological development, additive technologies of titanium alloys, critical technologies, enhancement of the complex properties of titanium alloys, thermal hydrogen treatment of titanium alloys, new materials.
INDUSTRIAL TOUCH MONOBLOCKS AND MONITORS AS THE BASIS OF DIGITAL PRODUCTION: PRACTICAL INTEGRATION WITH MES
K.A. Stroshkov, K.A. Sakantsev
Manufacturing Execution Systems (MES) have become a core component of Industry 4.0, enabling real-time control, traceability, and efficiency improvements. This article examines the role of industrial all-in-one PCs and monitors as key human–machine interfaces in MES implementation. Based on practical experience in integrating MES into production lines, automated warehouses, and parcel locker systems, the authors demonstrate how the use of industrial all-in-one solutions enhances OEE, reduces operator errors, and shortens response times to production deviations.
Keywords: Digital manufacturing, human–machine interface, manufacturing automation, production information systems, production efficiency.
