Contents of the Paton Welding Journal
no.9, 2009 |
|
Page |
75 Years of the E.O. Paton Electric Welding Institute of the NAS of Ukraine |
2 |
SCIENTIFIC AND TECHNICAL |
Poklyatsky A.G., Chajka A.A., Klochkov I.N. and Yavorskaya M.R. Strength and structure of aluminium alloy welded joints made by friction stir and non-consumable electrode welding |
9 |
|
Comparative analysis of the degree of softening and level of strength of welded joints of ductile low-alloyed aluminium alloys and high-strength complex-alloyed aluminium alloys produced by friction stir and non-consumable electrode welding has been performed. It is shown that the strength of welded joints of ductile low alloys is the same with both welding processes. Deformation strengthening of welds of high-strength complex aluminium alloys achieved in friction welding provides a higher level of their strength in fusion welding. |
Lankin Yu.N., Bondarev A.A., Dovgodko E.I. and Diachenko V.A. Control system for beam scanning in electron beam welding |
13 |
|
The microprocessor-based control system for scanning of the electron beam in electron beam welding and software for graphical design of scans are described. The system makes it possible to implement the scans with an arbitrary resultant distribution of the electron beam power density in the welding zone. Design of a scan comprises setting a path and instantaneous power of the electron beam at each point, and imaging the resultant distribution of the beam power density. The program of changes in deflection coil currents is automatically calculated. |
Moskovich G.N. Features of current inverter design |
17 |
|
Features of current inverter operation are studied. Functional dependence of the duration of half-period (in radians) of the current inverter oscillation process on circuit Q-factor was derived. Performed analytical calculations of inverter current are presented in the graphic form in different systems of coordinates. A new design procedure was developed and new frequency-time characteristics of current inverters were calculated. |
INDUSTRIAL |
But V.S., Velikoivanenko E.A. and Olejnik O.I. Peculiarities of application of split tee-joints in repair and reconstruction of main pipelines in service conditions |
23 |
|
The effect of thickness of walls of the connecting elements, internal pressure during installation, and distance between the circumferential welds that connect a tee-joint to pipeline on geometric dimensions of the above welds was studied. Nomograms were plotted to determine allowable pressure in hydraulic tests of the resulting welded joints, depending upon the length of an installed tee-joint and rigidity of a pipeline. Examples of application of the design and technological solutions are given. |
Chinakhov D.A. Effect of double-jet gas shielding on performance of welded joints on GL-E36 shipbuilding steel |
29 |
|
The effect of double-jet gas shielding on the quality of welded joints on low-alloy shipbuilding steel in multilayer arc welding in gas mixture shielding atmosphere is considered. The possibility of reducing chemical and structural heterogeneities in the joints and improving their mechanical properties is noted. |
Storchaj E.I., Gorbatsky Yu.V. and Lantushenko L.S. Some aspects of the technology of high-temperature fluxless brazing of aluminium alloys |
32 |
|
Currently available methods of high-temperature fluxless brazing of aluminuim alloys, their typical application areas and characteristic disadvantages have been analyzed. A new highly-efficient method of brazing in argon, using porous titanium (getter), is proposed. |
Litvinov A.P. and Derlomenko V.V. Weldability and performance of welded joints |
38 |
|
The stages of development of conception of weldability, such as criteria, principles and methods of its evaluation, are considered. The appearance of complex-alloyed materials requires new scientific approach to evaluation of weldability. The relation and effect of weldability on performance of welded joints is shown. Different principles of qualitative and quantitative evaluation of weldability are analyzed including the allowance for an aggregate state of material in the zone of welding, methods of process realizing, energy input and consumption. The complex of factors is given to be considered at evaluation of weldability. |
BRIEF INFORMATION |
Zhudra A.P., Voronchuk A.P., Fomakin A.A. and Veliky S.I. New equipment for hard-facing of charging device bells and cups |
44 |
|
New hard-facing apparatus A-1812 and a microprocessor-based control system were developed for machines of the U-50, U-75 and U-125 types. The equipment is meant mainly for hard-facing of blast furnace charging devices. Specifications of the new equipment are given, and its peculiarities are described. |
NEWS |
To the Thwenty Fifth Anniversary of Application of Welding in outer Space |
47 |
Opening of Russian-German Center of Laser Technologies |
50 |
