e10

	Journal "Tekhnologiya Mashinostroeniya"	ISSN 1562-322X
	Contents (�10 2015)
to russian

Grigoryants A. G. � The development of modern laser technology

CONSTRUCTIONAL MATERIALS, PHYSICAL METALLURGY

Grigoryants A. G., Kolchanov D. S., Tretyakov R. S., Malov I. E. � Selective laser melting of metallic powders, growing thin-walled and mesh structures

The features of the metallic powders selective laser melting process are considered in this paper.
Technology development path is tracked. These various factors and parameters that affect the formation mechanism of high-quality structures for growing the product are pointed. Questions and problems demanding decision for further perfection the technology are raised. The description developed and designed domestic experimental setup for work through the parameters and study the process of metal powder compositions selective laser melting is given. The research results of the support structures growing parameters are adduced.
Key words: selective laser melting, metal powder, thin-walled part

BLANK PRODUCTION

Grigoryants A. G., Shishov A. Yu., Funtikov V. A. � Combined laser treatment of the electrotechnical steel

A new direction of the local laser treatment of the finished transformer steel surface by a diode laser and the use of acoustic diagnostics method application of the material stress state are considered in this article. For a period of decades, since l974, when in the Soviet Union a method of laser treatment of transformer steel meant to reduce specific magnetic losses was tested by Ural scientists team (Institute of Metal Physics, Ural department of the Academy of Sciences of the USSR), several schemes of the transformer steel surface local treatment are developed and applied to the present.
Key words: transformer steel, the local laser treatment, combined laser treatment of complex electrotechnical steel, laser diode, the domain structure

SHAPING TECHNOLOGY

Malov I. E. � The polymerization process analysis in the presence of atmospheric oxygen as applied to the laser stereolithography technology

This article presents one of the work stages on the photopolymerizating compositions (FPC) creation for laser stereolithography and optimizes their technological properties optimization. In particular, the polymerization reaction features in the presence of oxygen and antioxidants are considered.
As far as atmospheric oxygen represents a polymerization inhibitor, reactions induction periods considered progressing in the closed and open systems, in which conditions the polymerization takes place in the products synthesis process.
Key words: photopolymerization, laser stereolithography, an antioxidant

MACHINE-TOOL AND CUTTING TOOLS PRODUCTION

Grigoryants A. G., Stavertiy A. Ya., Tretyakov R. S. � Five-axis system for the parts growing by coaxial laser melting of powder materials

In the article the modern high-tech domestic complex for parts growing from powder material by means of the coaxial laser melting technology is considered. A comparison with the most famous foreign analogs was carried out. The complex kinematic and technological features are described.
Special software allows simplifying work on the complex and ensuring rapid changeovers to produce parts with complex geometry.
Key words: laser welding, powder metallurgy, three-dimensional printing, import substitution, parts restoration

RECEIPT TECHNOLOGY OF THE PERMANENT CONNECTIONS

Grigoryants A. G., Grezev A. N., Grezev V. N., Malov I. E., Korneev A. E., Pehelkin A. I., Yaropolova E. I., Kobelev O. A. � The technology development of the laser welding steel ChS82 containing boron applied to covering tubes for nuclear power plants (NPP)

The laser welding technology of the pipes from steel ChS-82 for nuclear power plants. It is demonstrated, that the laser welding application has great perspective at covering pipes production, since a focused laser beam high concentration permits to receive welding joints with properties close to those of the basic metal, and the residual strain in 6�10 times lower compared to arc welding. The joints microstructure obtained by laser welding of steel ChS-82 is researched.
It is found that the resistance of welding joints against technologies crack formation increases with welding speed increasing due to the structure refinement of all the constituent phases in the seam metal.
Key words: laser, welding, microstructure, cracks, properties

Tretyakov R. S., Ganzales Luis, Shiganov I. N. � Power plants parts restoring by means of laser welding deposit

The laser welding deposit technology of energy facility parts is considered in this article.
A comparison of laser welding deposit with other surface restoration methods such as arc and plasma welding deposit is given. The analysis of powder materials used for welding deposit is carried out. The main purpose area of these materials for growth of the wear resistance, heat resistance, corrosion resistance, and others properties are pointed. The dependence of the weld beads geometry from the basic parameters of laser welding deposit are researched. The composition and the basic elements of laser facility for welding deposit are considered. Examples of the laser welding deposit utilization of details for restoration of the thermal power plants energy facility parts are adduced.
Key words: laser, welding deposit, technology, powder, modes, equipment

SPECIAL TECHNOLOGY

Melnikova M. A., Melnikov D. M. � Laser radiation influence on polymer films for the purpose of special labels creation

Temporary and energy conditions of invisible marks formation in polyethylene films for laser radiation are considered. Polyethylene structure changes on the micro molecular level are established.
One of these changes indicators, researched in this work, is an effect step nature of the transformations accumulation in the material. Film irradiation time influence on the invisible mark formation is considered too and the boundary irregularities demensions at which the mark remains invisible are determined.
Key words: laser, radiation, polymer films, marks

Kulikov I. V., Shupenev A. E., Bogdanov A. V. � Pulsed laser deposition technology for HTS films

The research materials of the pulsed laser deposition technology of textured metal strips from multicomponent materials YBa2Cu3O2 on the tape substrate high-temperature superconductors are adduced. Practical recommendations over the deposition working conditions are given.
Key words: superconductivity, textured tape, pulse laser deposition

Shiganov I. N., Kurilov M. Yu. � Aluminum alloy preparation for welding via a laser cleaning

Two methods of a surface contaminants removing for laser cleaning: thermomechanical (shock-wave) and direct ablation (evaporation) are considered. The material removal mechanisms from the aluminum alloys surface under the influence of fiber laser pulse radiation are represented.
The dependence of the removed material quantity from the radiation parameters are studied. The possibility of the aluminum alloys surface preparation for welding with laser cleaning application is shown.
Key words: laser, surface cleaning, aluminum welding

METHODS OF CONTROL AND DIAGNOSTICS

Melnikov D. M., Shiganov I. N., ZoYeMyat � Express method of lubricants contamination determining with mechanical impurities by means of phase laser analysis

Express methodology for determining of the mechanical impurities concentration in petroleum oils as an example of hydraulic oil AMG-10 is described. This methodology is implemented on the basis of the laser phase analysis method. The studies were conducted on the device "ASS-Express" specially designed for this method. The methodology allows oil control directly on the place of its operation, timely track oil contamination for efficiency reducing preventing of the mechanisms utilizing this oil.
Key words: methodology, laser, lubricants, analysis, impurities

Yakimova M. A., Alekhnovich V. I., Melnikov D. M., Grigoryants A. G. � Application of Bayesian approach to the data analysis of data about the substance composition

The article presents an approach to the indirect measurements results processing of multicomponent media in the presence of several independent parameters and significant probability of composition fluctuations (e. g. as a result of falsification). The proposed methodology is based on the data variation analysis as the main tool for substances independent parameters definition.
Bayesian analysis allows analyzing the optical properties of the substances and choosing the approach appropriate for its description.
Key words: laser, multi-media mediums, control, methodology, optical properties

MATHEMATICAL MODELING, NUMERICAL METHODS, PROGRAM COMPLEXES

Taksants M. V., Misyurov A. I., KhtetAung Lin � The regression model for efficiency calculating of laser radiation utilization hybrid welding

Nonlinear mathematical model of the dependence of the laser radiation influence efficiency at the quenched steel hybrid treatment from mode parameters, possessing high quality and accuracy of prediction results is developed. The received regression equation allows to analyze influence tendency of the mode parameters on the efficiency of the hybrid laser welding.
Key words: laser, hybrid welding, efficiency, regression equation, modeling, analysis

Shiganov I. N., Samarin P. E. � Forming process modelling of the compound coating with SiC particles on the aluminum alloy aluminum alloy by powerful laser radiation

This work is devoted to modeling process of penetration of SiC particles in molten surface produced by powerful laser radiation of the aluminum alloy. Creation of such surfaces allows significantly increasing the wear resistance of aluminum alloy. Physical and mathematical model describe necessary technological conditions for penetration of particles to a depth up to 1,5�2,0 mm.
The results of calculations are confirmed experimentally.
Key words: laser, particles, model, surface, calculations, microstructures

STANDARDIZATION, QUALITY PRODUCTION MANAGEMENT

Grigoryants A. G., Tretyakov R. S., Funtikov V. A. � The quality improving of the parts surface layers of parts received by means of laser additive technology

The non-contact method of the parts surface quality increasing produced through the use of laser additive technology from metal powder materials is considered in this article.
Key words: additive technology, laser polishing, laser welding deposit, macroroughness

FOREIGN EXPERIENCE

Potapova G. S. � Content of foreign journals

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