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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�04 2017)
to russian

SCIENTIFIC-TECHNICAL SECTION

Efimenko N. G., Bartash S. N., Artemova S. V. � The structure and properties of welded joints of large thick-walled structures made from steel 25L performed without heating

The effect of welding without preheating and additional technological operations by using a transverse hill method (THM) on the mechanical properties and structure of welded joints from steel 25L is researched. These properties are compared with the properties after welding with heating and high-temperature tempering. It was found that after welding without any additional operations in the HAZ structure is formed of the upper granular bainite resistant against brittle fracture strength and impact-plastic properties which exceed the requirements of the base metal.
Key words: steel, welding, cross hill, preheating, tempering, structure, grain, bainite, properties, brittle fracture

Kuryntsev S. V., Shiganov I. N. � Welding of austenitic steel with copper by using a defocused radiation of the fiber laser

The paper considers the features of laser welding of austenitic steel to pure copper without using any filler material or intermediate material. Were used defocused fiber laser beam, with offset to austenitic steel. According to the selected laser welding modes the welds of dissimilar materials without defects, with comparable strength to the pure copper were made. Tests on the tensile welded joints and measured of microhardness have been conducted. The microstructure of welds and chemical analysis of the transition zone was conducted.
Key words: fiber laser welding, dissimilar metal joints, copper, austenitic steel, mechanical properties, microstructure

Krafchenko I. N., Kolomeychenko A. V., Solovev R. Yu., Baranov Yu. N., Pupavtsev I. E. � Thermal efficiency in plasma depositionplasma with powder materials

The paper presents the results of investigation of the thermal effectiveness assessment of the process of plasma-jet surfacing by powder materials which provides faster thermal saturation and metal powder particle melting in comparison with solid metal of an item. The regularities of the influence of the process technological parameters on the formation of coating layer on the elements being reconditioned by plasma-jet surfacing are determined on their basis.
Key words: plasma-jet surfacing, powder materials, mathematical model, mode optimization, thermal effectiveness

Khokhlatova L. B., Kolobnev N. I., Ovchinnikov V. V. � Coupling properties and structure of the sheets from alloys 1424 and V-1461, made by friction welding with intermingling

An influence of friction stir welding (FSW) conditions on the structure and mechanical properties of the welded joint of B-1461 and 1424 alloys have been investigated. During FSW process the recrystallized fine-grained microstructure is formed in the welded joint. It was shown that an increase of heat investment into the sheets to be welded does not lead to an increase of average size of grains in the weld zone (average size of grains 1,5�2,2 μm). In this case the ultimate strength of welded joint depends on welding conditions for both alloys. Parameters of microstructure, formed in the weld zone, its influence on mechanical properties of welded joints and evolution caused by heat treatment after FSW are discussed.
Key words: aluminum alloys, friction stir welding, fine-grained structure, dynamic recrystallization, strength

PRODUCTION SECTION

Mikhalchenkov A. M., Lyalyakin V. P., Solovev R. Yu. � Influence of welding methods on the level of residual stresses at the closing up of cracks in body parts made from gray cast iron

It is shown that the level of residual stresses at the cracks in the brewing housing parts are not sufficient for their buckling depends on welding techniques, and their variation is the same for all devices. Job strain weld tensile or shear depending on the variant of welding and heat-affected determines the probability of occurrence of cracks.
Key words: technician welding, residual stresses, gray cast iron, housing parts, cracks, deformation, strain measurement, simulation, warpage

Burkov A. A. � Electrospark WC-Co coating with different iron concentration

This paper is devoted to studying the effect of the iron concentration in the WC-Co electrode materials on the structure and properties of coatings deposited on the low-carbon steel by electrospark alloying (ESA). The effect of iron concentration on the character of mass transfer and the thickness of the deposited coatings is shown. The phase composition, surface roughness and wear resistance of coatings at dry and microabrasive friction is studied. Amplification of the tungsten carbide decarbidisation at ESA with iron concentration increasing in the electrode materials is shown.
Key words: electrospark alloying, tungsten carbide, steel 35, mass transfer, roughness, wear resistance

Tsibulskiy I. A., Klimova O. G., Korsmik R. S., Akhmetov A. D., Kuznetsov M. V. � Influence of the treatment process technological parameters for penetration of copper and iron at the laser deposition of copper-nickel alloy on steel

Deposition of the copper-nickel alloy on steel with the use of high-power fiber laser is carried out. Rolls of various widths and heights are obtained by varying the process technological parameters.
The conducted metallographic studies have shown that areas of no molten steel take place at optimal deposition modes. In areas, where steel was melted, the fusion penetration, the width of the transition zone from steel to copper, the penetration depth of the cracks caused by the effect of Rehbinder and content of the iron phase in the copper layer is less than in other modes.
Key words: laser deposition, welded joints of dissimilar materials, copper-nickel alloys, steel, antifriction properties

Nafikov M. Z. � Coating from non-ferrous metals and alloys on the basis of carbon steel

New methods of application of electrocontact welding on the surface of parts made of carbon steels from non-ferrous metal coatings and alloys other hard-to-weld materials are suggested. Used as an additive heterogeneous bundles of wires or a combination of additives consisting of a perforated tube of non-ferrous metal and the wire from low carbon steel which is passed through this tube.
Key words: electrocontact welding, metal coating, non-ferrous metals, composite additives

STANDARDIZATION

Petrov S. Yu. � An analysis of the terms and definitions used in the welding standarts (GOST). The term "welding"

The etymology of the word "welding", his chronicle / historical retrospective and a contemporary interpretation are considered. Proposals for correcting of the existing state standards (GOST) from a point of the definition of the term "welding" are given.
Key words: welding, welder, technological process, state standard

ECONOMIC AND PRODUCTION ORGANIZATION

Molchanskiy A. V., Barabash Zh. A. � The information collecting for the information system creation of decision-making support by manager of small and middle team

Object of researches in this article were business processes in production structures. As a result of researches the information collection methodology about business processes for information system designing for of decision acceptance support is developed. This methodology is constructed from an analysis of information receipt methods from the staff of production structure; from a model of information collection; from information collection methods about business processes for information system designing of decision acceptance support.
Key words: business process, information collection methodology, information system

INFORMATION

Saraev Yu. N. � Development of scientific bases for the metal structures reliability increasing during the operation at low climatic temperatures conditions through the modifying welded joint zone by composite materials, pulse energy influence and shock-mechanical processing

Loshakov A. M. � 80 years

Shiganov I. N. � 70 years

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