Journal "Svarochnoe Proizvodstvo"ISSN 0491-6441
Contents (№02 2018)
to russian


SCIENTIFIC-TECHNICAL SECTION

Saraev Yu. N., Lunev A. G., Kiselev A. S., Gordynets A. S., Nesteruk D. A., Khaydarova A. A., Chinakhov D. A., Semenchuk V. M. — Investigation of the influence energy parameters of the arc welding mode with coated electrodes for the stability of heat and mass transfer

The article presents the results of the investigation of the influence of varying energy parameters of the arc welding regime with coated electrodes of various grades and types on the stability of heat and mass transfer. It is shown that in the case of welding technology with a pulsed change in the energy parameters of the regime, a favorable effect on the heat content of the weld pool and the conditions for its crystallization are provided. Prospects for continuing research with a view to improving the performance of welded structures of a responsible design due to optimization of welding parameters are substantiated.
Key words: arc welding, surfacing, pulse current, pause current, frequency of short circuits, heat input, permanent connection, reliability, weld pool

Tarnovsky A. I., Geller A. B. — Numerical evaluation of fracture toughness of structural steels

Are the test results on the slow trjohtochechnyj bending the metal tube of austenitic steels, during which defined the criterion of numerical evaluation of viscosity of destruction.
Developed compact device and method of testing of samples in the form of plates with a deep notch, which enable you to define the criterion of numerical evaluation of viscosity of destruction at the stage of assessing the properties of structural steels, including tensile test at room temperature samples from base metal and weld metal electrodes of two brands: with rutilovym and fluorine-calcium coating. The results of the test confirm the effectiveness of the proposed criterion. Method and device for efficient and allow you to perform tests on a small volume of material.
Key words: strength, ductility, toughness, work of fracture, the average job destruction rate of full viscosity, the viscosity at the stage of unloading, the stress intensity factor, the ratio of the crack opening, the integral of the Flight

Kovtunov A. I., Gushchin A. A., Plakhotnogo D. I., Bochkarev A. G. — The effect of silicon on the formation processes and properties of the deposited alloys of the system Ti-Al

The results of investigations of argon-arc deposition of alloys of the titanium-aluminum system are presented. The effect of silicium on the composition of the structure and properties of the deposited alloys is established.
Key words: surfacing, titanium—aluminum alloys, silicium, filler wire, heat resistance, wear resistance, hardness

Tarasenko Yu. P., Krivina L. A., Tsareva I. N., Berdnik O. B. — Pulse microsurfacing for repair technologies of turbine blades from high-temperature nickel monocrystallize alloys

The results of experimental studies on the optimal surfacing material choice for parts pulsed microdeposition made from single-crystal high-temperature nickel alloys are presented.
The microstructure, microhardness, adhesion strength and high-temperature stability of the deposited zones are analyzed. The research results are implemented during the development of the technological process for the repair and recovery treatment the 1st stage of the SGT-800 Siemens gas turbine work blades.
Key words: material deposit, pulsed microdeposition, heat-resistant nickel alloy, microstructure, microhardness, adhesion strength

Kalin B. A., Ivannikov A. A., Suchkov A. N., Sevryukov O. N., Bachurina D. M., Penyaz M. A., Fedotov I. V., Dzhumaev P. S. — Investigation of the influence of the composition of nickel alloy-solders on the structuralphase state of brazed joints of corrosion-resistant steels

The investigation results of diffusion brazing process of corrosion-resistant steels from austenite (12Х18N10Т) and ferritic-martensitic classes (16Kh12МVSFBR) through the use of nickel boron-containing solders STEMET 1301A (Ni-7Cr-3,5Fe-4,5Si-2,6B), STEMET 1350 (Ni-19Cr-9Co-6Si-5,5Mo-1,3B), Ni-7Cr-7,5Si-1,5B and Ni-22Cr-7,5Si-1,5B mass % is stated. It is shown that the soldered joints and the heat-affected zone have a complex heterogeneous structure. Experiments to determine the mechanism of boride nucleation have shown that borides are formed during isothermal exposure irrelatively with the iron phase transition γ → α. It is established that the concentration of boron and chromium in the alloy-solder plays an important role in the formation of the structure. An increase the chromium content in the solder makes it possible to avoid the steel depletion relating to chromium in the heat-affected zone, but this is accompanied by the formation of new phases, borides and silicides in the center of the seam.
Key words: diffusion brazing, corrosion-resistant steels, nickel boron-containing solder

PRODUCTION SECTION

Chursin M. A., Lebedev S. V., Neverov V. V., Klevtsov P. N. — Surfacing powder material PR-10Р6М5 for hardening the working surfaces of metallurgical equipment

The possibility of replacing the depositing material for hardening the working surface of metallurgical equipment parts with the purpose of increasing the service life and reducing the cost of the article is considered.
Key words: blast furnace, metallurgical equipment, modes of surfacing, heat treatment, plasma-powder surfacing, austenitic steel, high-speed steel

Shatov A. P. — Properties of welded joints of steel pipes of anticorrosion aluminum-coated, welded in carbon dioxide

In the paper, the operational properties of steel pipes with and without aluminum coating, made by mechanized welding in carbon dioxide with the consumable electrode Св-08Г2С, are considered. It is established that when welding on an aluminum metallization coating with a thickness of 240—360 μm, the cold-shortness threshold shifts toward positive temperatures. To prevent this phenomenon the use of paste flux is provided, which makes it possible to shift the cold-shortness threshold of welded joint patterns towards negative temperatures (–40 °C), by transferring oxide inclusions from the metal of the molten bath to the slag, and thereby eliminating the harmful effect of these oxides on the mechanical properties of welded joints.
Key words: welding, electrode wire, mechanical properties, pastes flux

Eltsov V. V., Karelov A. V. — Innovative developments of TSU in the field of welding for automotive industry. To the 50th anniversary of VAZ

Active interaction of university science and production allows increasing the efficiency of output and reducing the cost of its production. Department of ""Welding, treatment of materials by pressure and related processes" of Togliatti State University, since the 70s of the 20th century, actively introduced innovative developments in the field of contact and arc welding at the enterprises of the automotive industry and other industries. The most significant developments providing a great economic effect in the production of vehicle parts were electroconductive devices for contact welding machines, three-phase arc power supplies and the equipment modernization and software modernization in the field of plasma-powder deposition of the valves for internal-combustion engine (ICE).
Key words: car, innovative developments, contact welding, bipolar cable, aluminum alloys, ICE, cylinder block, valves, repair welding, three-phase arc, power supplies, plasma-powder deposition, mathematical model

Volkov S. S., Maloletkov A. V., Kobernik N. V. — Peculiarities of formation of welded joints in ultrasonic welding of plastics

It was found that during the ultrasonic welding of plastics mutual diffusion of polymer molecules happens on the surfaces to be welded in the temperature range corresponding to a plastic condition of polymers. It is suggested that the heat source for ultrasonic welding of plastics are hysteresis loss. It is found that the transfer of ultrasonic energy to the weld zone depends on the elastic properties and the oscillation damping coefficient of weldable polymers. It shows the essence of the process of contact and transfer ultrasonic welding.
Key words: temperature, amplitude, ultrasonic welding, hypothesis, plastics, thermal cycles, the strength, the energy, oscillation frequency, modulus of elasticity, damping coefficient, contact welding, transfer welding

EDUCATION AND TRAINING

Bichurin Kh. I., Pisarenko O. V. — Improvement of the personnel policy at the enterprises of the rocket and space industry

The article considers the actual problem of improvement of personnel policy at the enterprises of the RCP. In the context of increased competition on the world market of space rocket services, there is an objective need for fundamental reform of the industry and solve the accumulated problems caused by including non-professional approach to the peculiarities and specific features of the products of the RCP, the success of the solution which is the organization's constant search for new (non-traditional) organizational and technical solutions. Development and implementation of measures aimed at improving the efficiency of personnel management, based on a thorough analysis of the existing system of personnel management at the enterprises of the industry considering the requirements of identifying gaps and opportunities, as well as with the requirements of the latest trends in talent management and the specifics of the development of enterprises, are one of the key tasks in the successful achievement of strategic sectoral objectives to achieve and maintain a strong leadership position in creating a competitive aerospace hardware.
Key words: personnel policy, aerospace industry, effectiveness of management, competitiveness


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