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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�1 2013)
to russian

SCIENTIFIC-TECHNICAL SECTION

Yemelyushin A. N., Sychkov A. B., Manin V. P., Sheksheyev M. A. � Welded joints� structure and mechanical properties investigation of the steel of K56 strength class at different characteristic of welding conditions

Research results of hand welding conditions parameter effect on the structure and mechanical properties of the welded joints from low-carbon low-alloyed pipe steel of the K56 strength class are covered. It is showed that ferrite and pearlite are formed in the shape of grains and of Widmanstatten pattern in the area of overheat at different combinations of the values of welding current and of welding rate in the heat affected zone. Using method of planned experiment retrogressive dependencies for the metal hardness and impact strength in the overheat area on the controllable welding characteristic are obtained.
Key words: pipe steel, welding current, welding rate, hardness, impact strength

Senchenkov I. K., Chervinko O. P., Ryabtsev I. A., Babinets A. A. � Determination of the welded parts� operation life at cyclic thermal and mechanical load

A method of calculation of the stress-strain state and resource of the using of deposited parts under the influence of cyclic, thermal and mechanical loads. The method makes it possible to study the history of stressing in each point of a deposited part, to choose appropriate models of destruction and basing on them to locate the centers of destruction and to estimate the resource of the deposited part in the process of using.
Key words: multilayer surfacing, residual stresses and deformations, cyclic thermal and mechanical loads, mathematical simulation, finite element method

Boulkov A. B., Safonov S. V., Balbekov D. N., Petrenko V. R., Peshkov V. V. � Surface microgeometry effect on kinetics of contact development at titanium diffusion welding

Test results of the titanium samples with model asperities simulate real surface roughness showed that factors influencing on the development of welding process and quality of the diffused joint arc microstructure of the workpi�ce and surface finish. It is established that some constant having time dimension can be used as integral characteristic of contact development between the joinable workpieces under conditions of diffusion welding.
Key words: diffusion welding, titanium alloys, physical contact, surface finish gage, mathematical modelling

Chigarev V. V., Gavrish P. A., Gribkov E. P. � Flux cored wire drawing operating conditions improvement

The designed automated software takes into account geometry changes during the process of wire drawing, mechanical properties and conditions of contact friction along the deformation zone, as well as plastic deformation conditions of an envelope and parameters of its fracture. A possibility of manufacturing defect-free flux cored wires at minimal transition count is confirmed.
Key words: deformation ratio, contact stress, shearing stress, level of the front and rear tension, automated analysis

Savchenko Ye. G., Stuchebnikov V. M. � Soldering sensors in pressure transducers based on the silicon-on-sapphire structures

Research results of the composition and microhardness of the BT6 titanium jointing layer (Ti�6Al�4V) with sapphire Al2O3, obtained by standard brazing using �Cp 72 (72Ag�28Cu) brazing alloy, as well as by CTEMET amorphous braze.
Key words: pressure transducer, pressure tensolransducer, structure, amorphous solders, brazing, titanium alloys, sapphire

PRODUCTION SECTION

Matviyenko V. N., Leschinskiy L. K., Stepnov K. K., Schebanits E. N., Omelyanenko N. I. � Hardening of forming rolls by surfacing using alloyed strip electrode and ceramic flux

The development of strip electrode composition for hardfacing of hot mill rolls has allowed the enhancement of impact toughness, ductility and thermal fatigue fracture resistance of deposited layers. For additional alloying to increase the hardness and wear resistance of deposited metal the ceramic flux is used. The composition of new ceramic flux improves the welding characteristics of the process and has low relative chemical activity compared to deposited metal. Rolling performance of the restored hot mill rolls in terms of rolling amount per 1 mm diameter reduction becomes greater.
Key words: arc hardfacing, strip electrode, ceramic flux, chemical activity, deposited metal, alloying, impact toughness, ductility, wear resistance, roll for hot rolling, performance

Guerasimov A. I., Danzanova Ye. V. � Method development of butt weld strength determination for polymeric pipes

A test method of polymeric pipes� butt welds is considered. When testing welded joints fracture occurs in the place of flash-off; this allows determining weld strength quantitatively. Results of the welded joints� tests carried out by the method are covered, the welds conducted at different conditions and temperature of the environment. It is established that under conditions of low temperature it is rational to preheat weldable bearing faces of polymeric pipes.
Key words: polymeric pipe, template, butt weld, strength

Shtennikov V. N. � Thermal conditions for soldering tool

The formulas showing dependence of thermal characteristics of the soldering tool from its design and heatphysical data in a mode of heating and cooling are given in work, including a mode of the soldering repeated.
Key words: soldering, soldering tool, temperature, heat transfer coefficient, heat, cool

Tsumarev Yu. A. � Sodium application in design of electrostatic welders

Special features of designing secondary circuit for electrostatic welders are considered. It is shown that aluminium and copper substitution by sodium reduces mass and cost of the elements of the secondary circuit production.
Key words: resistance spot welding, secondary circuit, copper substitutes when manufacturing electric conductors, sodium

ECONOMICS AND PRODUCTION ORGANIZATION

Tochilin O. V. � WTO in the international innovative investment system: organizational, economic and legal aspects

The author considers the basic rules and principles of the WTO working, and also various aspects of activity of this organization in the international innovative and investment system.
Key words: innovative-investment system, WTO, goods, services, principles

INFORMATION

Suslov An. A. � The 12th International specialized exhibition Weldex/Rossvarka� 2012

BIBLIOGRAPHY

Contents of the foreign journals on welding

RF patents for the inventions in the field of welding

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