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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�02 2020)
to russian

SCIENTIFIC-TECHNICAL SECTION

Alrukhaymi �. G., Ivanov �. �., Tingaev �. K., Voronin S. I. � Influence on factors of cold crack formation factors of a steel 10G2FBYu welded joint by regulating linear energy

The article considers the influence of heat input and ambient temperature on the resistance to cold cracks formation in welded joints of high-strength steel 10GFBU. The studies were carried out on Tekken samples with variation of heat welding input from 5.7 to 14.3 kJ/cm and ambient temperature from �20 to +20 ��.To analyze the reaction of the metal to the thermal cycle of welding, metallographic and durometric studies of the welded joints metal were carried out and its cooling rate was calculated in the temperature range of 800�500 �C.
As a result of the research, it was found out that the heat input has a direct impact on the resistance to the cold cracks formation in the welded joints metal and it should be taken into account when assigning the preheating temperature.
In particular, at the value of the effective heat input of 10.3 kJ/cm cold cracks are not formed during the welding without preheating of steel of 18�36 mm thickness at an ambient temperature of 20 �C, and are not formed at not less 14.7 kJ/cm heat input at �20 �C. The critical cooling rate, which provides resistance cold cracking of the weld metal made with electrodes ESAB MTG-01� is 55 �C/sec.
To assess the effect of preheating temperature and heat input on the cooling rate of the HAZ metal in the temperature range of 800�500 �C the corresponding dependences were constructed, from which it follows that the most significant effect of preheating on V8/5 is observed when welding at low heat input characteristic of manual electric arc welding.
Key words: cold cracks, high-strength steel, welded joint, heat input, cooling rate, hardness

Mikhalchenkov �. �., Feskov S. A., Kozarez I. V., Torikov V. E. � The effect of thermal hardening and alternating operational loads of 65G steel on the microhardness of the area deposited by a low-carbon electrode

The distribution of microhardness in the cross section of the depositing region by a low-carbon electrode has a complex configuration, which is resulting from a variety of structural and phase components, the presence of elastic-plastic deformations, and the presence of preliminary thermal hardening of the base metal. The microhardness of the surface of the deposited metal is 410 Hv, which provides increased wear resistance of the friction surface. Operational alternating loading have not influence on the microhardness and structure of the deposited region.
Key words: heat hardening, alternating loading, 65G steel, microhardness, deposition, low-carbon electrode

Kozyrev N. A., Kryukov R. E., Mikhno A. R., Usoltsev �. �., Umanskiy �. �. � Development of new welding fluxes based on silicomanganese slag and ladle electric steel-smelting slag

The possibility of manufacturing a welding flux based on slag from the production of silicomanganese and ladle electric steel-smelting slag is evaluated. The production of flux-additives is carried out according to two variants: fractions of the ladle electric steelsmelting slag less than 0.2 mm mixed with liquid glass in a ratio of 62 and 38 %, respectively. Flux-additive is mixed in the ratio of 5, 10, 20, 30, 50 % with the slag of silicomanganese.
It is determined that due to the low concentration of iron oxide and increased basicity, it is possible to use this material at alloyed metal deposition. An analysis of the contamination level with non-metallic inclusions and an increase in the sulfur content in the deposited metal showed that introduction of the flux � additives based on ladle slag of steel-smelting production an amount of not more than 20 % it is possible without deterioration in quality. With an increase in flux � additives more than 20 %, the deposition quality is deteriorated, the number of non-metallic inclusions increases, the sulfur content increases. With an increase of the flux additives introduction over 30 %, the appearance of the deposited layer worsens.
Key words: deposition, welding fluxes, anthropogenic wastes, silicomanganese slag, ladle electric steel-smelting slag, microstructure, non-metallic inclusions

Kalita V. I., Radyuk �. �., Kovalevskaya Zh. G., Sharkaev Yu. P., Komlev D. I., Tolmachev A. I., Ivannikov A. Yu., Zakharov I. N., Bagmutov V. P. � Hardening of plasma coatings from high speed steel during electromechanical and ultrasonic treatment

The coatings from high-speed steel obtained by gas-thermal plasma deposition followed by electromechanical and/or ultrasonic surface treatment are studied. It is shown that the most significant effect of coating hardening is observed with combined electromechanical and ultrasonic treatment. The microhardness of the coating increases by 83 % due to the summation of the hardening effects at all structural levels.
At the macro level, hardening is due to the healing of pores and the formation of new metal bonds between the deposited coating particles; at the micro level, is due to the formation of a substructure and disperse release of the second phases inside the particles.
Key words: high-speed steel, plasma deposition, electromechanical treatment, ultrasonic treatment, microhardness, macrostructure, microstructure

PRODUCTION SECTION

Kashin Ya. M., Kopelevich L. E., Samorodov A. V. � Axial non-contact welding DC generator

The quality of the output voltage of a welding apparatus, such as a welding generator, has a significant impact on the quality of the welding joint. The design and operation of a non-contact DC welding generator of axial design are considered in the article. The technical solutions proposed by the authors features by low cost, efficient use of electrotechnical material, ease of manufacture and versatility, high quality of rectified voltage, which can significantly improve the quality of welding joints.
Key words: axial design, DC generator, rotor, stator, multiphase rectifier, electromechanical energy converters

Lukin �. �., Pismenny �. �. � The study of the flange connection with the sheet blank obtained by relief welding via a low-frequency machine MRN-340.01 in conditions of incomplete current shunt

The possibility of obtaining a high-quality welded joint of the flange with the sheet stock under conditions of incomplete current supply on the low-frequency relief machine MRN-340-01 is shown. The results of a metallographic study of the weld in various sections of the flange, the optimal welding conditions and the geometric parameters of the workpieces in mass production are presented. This experience can be extended to other products obtained by embossed welding on low-frequency machines.
Key words: resistance welding, current lead, low-frequency converter, heat affected zone

Fedorov A. V., Rymkevich A. I., Khodakov D. V. � Features of specialist certification and welding technology for nuclear facilities

The article states the basic principles of the welder certification (in accordance with PN AEE G � 7-003�87). The certification processes of welding technologies in accordance with the approved GOST 50.04.01 are reflected.
Key words: certification of welder, certification of welding technologies, compliance with GOST

STANDARDIZATION, PRODUCTION QUALITY

Budkin Yu. V., Dokukin A. V., Kvasnitskiy V. N., Garin A. V., Geletiy A. N., Zlydnev M. N. � Current state and prospects of the new production technologies standardization in machine building

The article discusses the current state and prospects for the development of standardization of new production technologies in mechanical engineering. The level of provision with standards and the intensity of their use by Russian enterprises have been established. The main problems associated with the development of standardization are identified: the risks of using foreign standards, the lack of copyright protection of domestic innovators. The prospects for improving the fundamental standards providing a more intensive development of standardization of new production technologies are described.
Key words: new manufacturing technologies, standardization, patent, digital economy

ECONOMIC AND PRODUCTION ORGANIZATION

Zharkevich �. �., Nurzhanova �. �. � Improving the quality management system in the conditions of LLP "Maker � KLMZ on the basis of improving the internal audit procedure

A histogram was compiled based on the results of external and internal audits for 2017�2019 of LLP "Maker" � KLMZ. The tasks of internal audits of Maker LLP � KLMZ are determined. An analysis of the existing problems of the "Internal Audits" process with the help of quality tools (Isikawa cause-effect diagram, Pareto diagram) is made.
Key words: internal audit, quality management system, process, documented procedure, Pareto diagram, cause-effect diagram of Ishikawa

Miklyaev I. A., Krekhalev V. V. � System of planned-prophylactic maintenance and equipment repair at LLC "Agni"

There are presented the theoretical and implementation principles for development, exploitation and development of the current system of preventive maintenance and repair of equipment in LLC "Agni". The structure of the content in the database of the system by new technology of storage and presentation of information is presented. The block diagram of the algorithm of automated control of planned repair and maintenance of equipment at the enterprise is given.
Key words: planned preventive maintenance, defect, equipment, relational database

INFORMATION

ESAB presents new products at the exhibition "WELDEX/Rossvarka � 2019"

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