e3

	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�3 2016)
to russian

SCIENTIFIC-TECHNICAL SECTION

Ostsemin A. A. � Viscous fracture and plasticity of mechanically heterogeneous welded joints with crack-like defect

Computational assessment of the static strength with asymmetrical mechanical inhomogeneity of; welded joints with a surface crack-like defect. Investigated the stress state of mechanically heterogeneous butt joints with a surface defect. Proposed method of evaluation of static strength of welded co-unity with asymmetrical mechanical inhomogeneity allows to determine the viscous fracture by introducing into the formulas the coefficients of the mechanical variableness.
Key words: butt splice, the relative thickness of soft interlayer, the crack surface, the tensile stress, the contact hardening, asymmetric mechanical inhomogeneity, coefficient of mechanical heterogeneity

Sidorov V. P., Melzitdinova A. V. � Research of the tolerance parameters for doublesided arc welding

The variants determine the permissible deviations parameters of the welding process. Sensitivity coefficients do not reflect the relative hazards of various kinds of perturbation parameters.
Proposed the relative transfer coefficient perturbation, which allows to estimate the propensity welding parameter perturbations and dues not involve the regulatory impact of the system. An example of the application of methods for determining the accuracy requirements modes and conditions for double-sided argon arc welding of high-alloy steel plates without cutting edges.
Key words: conditions and modes of welding, welding parameter perturbation, two-sided argon arc welding, the deviations of conditions and modes

Fedorov S. S., Tishchenko M. Yu., Shmakov S. V., Zaydes S. A. � Welding features of the highly-loaded structures from titanium alloys

The article considers the problems of quality of joints in submerged metal arc welding and consumption of electrode material at high voltage testing. The authors suggest technological approaches how to improve the quality of nondetachable connections using gas tungsten.
Key words: welding, defect, gas tungsten, nondetachable connections

Prokhorov A. V. � Thermal model of resistance spot welding

Analytical model of the flat parts spot welding is proposed. The formula for the calculation of non-stationary temperature field in three-dimensional terms is derived. The basic geometric and thermal parameters of the welded article are taken into account. It is shown that when setting of the welding technological mode must take into account not only the type of the welded material and sheet blanks thickness, but the article dimensions and the pitch of weld.
Key words: mathematical modeling, butt resistance welding, not stationarity

Chudina O. V. � Modification of the steel surface through the use of laser heating

The article is devoted to the improvement of the steel products operational properties by creating modified hardened layers on the surface through the use of laser heating. A combined technology, which consists in laser alloying of the steel surface by nitride-forming elements and nitriding, is proposed. It is shown that when the laser alloying in continuous radiation mode the layer with a uniform fine structure thickness 600 microns forms in the steel surface. Subsequent nitriding eliminates unfavorable nature of the residual stresses, increases the microhardness of low carbon steel up to 20 000 MPa, fractural toughness � 1,5...1,8 times, and wear resistance �1,5...3 times.
Key words: steel surface modification, laser alloying, nitriding, microstructure, micro-hardness, wear resistance

PRODUCTION SECTION

Matvienko V. N., Leshchinskiy L. K., Polukhin A. V. � Development of the large-size products submerged welding deposit technology via a composite strip electrode

The results of the investigation and development in technology of submerged arc hardfacing of the large-scale components using composite strip electrode has been presented. It�s shown that the desired chemical composition and properties of the buffer layer, as well as wear-resistant layer, depend on the selected geometry of the composite strip electrode and welding parameters.
Key words: submerged arc hardfacing, composite strip electrode, central and lateral strips, angle of rotation, weld pool, dilution, large hot mill roll, parent metal, deposited metal, alloyed strip, buffer layer, wear-resistant layer, welding parameters

Latypova E. Yu., Tsumarev Yu. A. � Composite structures elements for undetachable junctions

When creating of the undetachable joinings is proposed to use the composite elements and is shown that such approach promotes the effectiveness increasing of technical solutions through the accounting possibility of the scale factor, a more precise dimensioning and the metall-roll waste products application in the production. The welded and brazed new design of the T-spot, lap and butt type joints is adduced. It is shown that at the uneven distribution of operating voltages can be provided fuller load through the use of compount elements from made materials with different strength.
Key words: undetachable joinings scale factor, welded joints, soldered joint, butt welds, argon-arc welding without filler metal

Novitskiy A. F., Shvedov K. M., Emelyanov V. V., Potapov S. V., Plakhuta S. I. � The butt resistance welding machine MSO-750 for building reinforcement joining

The article presents data over the machine for fusion resistance welding of the compact section products designed by Technology Centre "Tehnosvar" (Pskov) and equipped with the latest hydraulic and electric equipment, providing semi-automatic positioning of the welding workpieces, automatic welding and the burr cleaning possibility directly in the mfchine after joints deposition.
The machine meets all modern requirements for welding equipment, versatile and high-performance that allows its use not only in construction but also in machine building and metallurgy.
Key words: rreinforcement ends joining; mobable and fixed clamps; Electrodes welding machine electrodes; carbide or deposited inserts; semi-automatic blanks positioning; automatic welding; burr cleaning

Danzanova E. V., Gerasimov A. I., Botvin G. V. � The butt welding of gas pipelines polyethylene pipes via a heated tool

The research results over the effect of changes in the butt welding technological parameters with heated tool (��) on the strength properties of the polyethylene pipes welded joints are adduced.
Following a research result optimal welding mode �� of polyethylene pipes, ensures high strength in short-term trials is selected.
Key words: plastic pipe welding parameters, breaking stress

Mulikov D. Sh., Rizvanov R. G., Karetnikov D. V., Fayrushin A. M. � The possibility valuation of the friction welding application for the manufacture of heat exchange equipment from steel 15X5M

The mechanical and other types tests results of the pipe blanks welded joints from steel 15X5M obtained by the rotation friction welding are presented. Based on the analysis results conclusion is drawn about steel 15X5M good friction weldability and about this welding method application possibility for the manufacture of "tube-tube grid" for heat exchangers from steel 15X5M at appropriate modernization of welding equipment.
Key words: friction welding, pipe blank, tube grid, heat exchanger

ECONOMIC AND PRODUCTION ORGANIZATION

Sazonov A. A. � The development of the industrial enterprise logistics

The analysis of the strengths and weaknesses of logistics departments of the company, identification of opportunities and threats change, as well as the prospects of the development of logistics.
Key words: logistics processes, strengths, weaknesses, development of logistics

INFORMATION

"KEMPPI OY" holds the results of the quarter and the year in Russia

Lykiny V. I. � 70 years

��: 127015, ��, �/� 65.
��.: +7 (495) 640-7903
e-mail: ic@ic-tm.ru

� 2008-2024, ��
�� - www.itsite.ru