Contents of the Paton Welding Journal
no. 4, 2010 |
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SCIENTIFIC AND TECHNICAL |
Slivinsky A.A. Analysis of factors of subsolidus crack formation in welding metals with fcc-structure of crystalline lattice (Review) |
2 |
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The paper gives terminological analysis of the phenomenon of subsolidus cracking in welding. Structural and technological factors affecting subsolidus crack formation in welding of various materials with fcc-structure of the crystalline lattice are considered. The need for generalizing the current concepts on this issue with application of modern physical models from the field of dislocation theory of plastic deformation and brittle fracture mechanisms at high-temperature creep is noted. |
Ryabtsev I.A., Kondratiev I.A., Chernyak Ya.P., Gordan G.N., Solomijchuk T.G. and Godzyra N.F. Structure and properties of high-manganese deposited metal |
7 |
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Effect of charge materials, containing ultra-dispersed carbides, on properties of metal deposited by flux-cored wire PP-AN105 was investigated. It was found that application of ultra-dispersed carbides leads to refining of deposited metal structure and more uniform distribution of alloying elements, thus improving its cold workability and wear resistance. |
Ternovoj E.G., Bulatsev A.R., Solomijchuk T.G. and ShulymV.F. Repair of pipelines using orbital tig welding inside inhabited space objects |
10 |
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Investigations on application of equipment and technology for orbital TIG welding to repair pipelines inside functioning space objects were carried out. Properties and structural peculiarities of 12Kh18N12T steel tubular joints made by auto-pressing under conditions of decreased effect of the Earth gravitation were studied. |
Dyadin V.P. Evaluation of temperature shift depending upon the specimen thickness by the force and deformation criteria of fracture mechanics |
14 |
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Relationships between impact toughness KCV and crack resistance characteristics of a material, derived by the E.O.Paton Electric Welding Institute, are applicable for a case where the plane-strain state forms within the defect zone. If this condition is violated, evaluation of crack resistance of structural members is not always optimal. To solve this problem, it is suggested that temperature shift in basic curves of fracture toughness characteristics should be evaluated depending upon the thickness of an object under investigation. It is shown that, in addition to thickness of a specimen, the temperature shift should also be evaluated by allowing for strength properties of a material and its welded joints. |
Dzykovich V.I., Zhudra A.P. and Bely A.I. Properties of tungsten carbide powders produced by different technologies |
22 |
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Investigation results are presented on properties of powders containing particles of tungsten carbides WCÄW2C and produced by different technologies. Physical characteristics of the above particles were evaluated. Chemical and X-ray analysis of the investigated powders were carried out. |
Borisova A.L., Adeeva L.I., Tunik A.Yu., Tsymbalistaya T.V. and Grishchenko A.P. Plasma ZrO2 coatings with metallic bond coat of alloy AlCuFe |
25 |
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The article present results of investigations of structure, phase composition and microhardness of thermal barrier plasma coatings produced by using quasi-crystalline alloy AlCuFe with a different content of the y-phase as a bond coat material instead of traditional alloy MeCrAlY (Me-Ni, Co, Fe). Formation of phases in the ceramic ZrO2 layer was studied depending upon the y-phase content in the bond coat of a thermal barrier plasma coating. |
INDUSTRIAL |
Pokhodnya I.K. and Kotelchuk A.S. Advance of ferrous metallurgy and welding consumables production in PRC (Review) |
30 |
The paper presents the data on development of ferrous metallurgy and welding consumables production in China during the last decade. Components of successful growth of steel and welding consumable production in this country have been analyzed.
Kuchuk-Yatsenko V.S., Nakonechny A.A. and SakhatskyA.G. Resistance welding of steel reinforcement using composite insert |
34 | |
The process of resistance welding of reinforcing steels with application of fluxed intermediate inserts has been investigated. It was determined that inserts allow producing joints equal in strength to the parent metal at sufficiently lower degrees of plastic deformation and specific power of the equipment. Technology of welding the reinforcement of classes AI-AV of diameter from 8 up to 32 mm is offered. |
Poklyatsky A.A., Ishchenko A.Ya., Chajka A.A. and LaburT.M. Friction stir welding as an effective method to improve structure performance |
37 | |
Main advantages of weld formation in the solid phase as a result of plastic deformation of metal in friction stir welding of auminium alloys are considered. Examples of using this process in the developed countries to produce welded structures in various engineering sectors and the resulting saving of the resources are given. Structures, weakening degree, strength, values of resistance to off-center tension of samples, and levels of residual stresses and strains in high-strength aluminium alloy welded joints produced by friction stir welding and nonconsumable-electrode argon-arc welding are analyzed. |
Zalevsky A.V., Galinich V.I., Protsenko N.A. and Kukharenko V.V. Code designations of locally manufactured fluxes and flux + wire combinations in keeping with international standards |
42 | |
The paper deals with the features of application of International Standards ISO 14171:2002 and ISO 14174:2004 for classification of welding fluxes. Code designations of local fluxes in keeping with the above standards are given, as well as identification of codes included into the designations, and recommendations on application of code designations of welding fluxes. |
BRIEF INFORMATION |
Lankin Yu.N. Influence of working frequency on dimensions of transformers for ac resistance welding |
49 | |
The paper deals with a resistance welding machine powered from a high-frequency mains. Effect of working frequency increase compared to industrial frequency on the volume of machine transformer core was studied. It is shown that frequency increase does not lower the overall dimensions and weight of the transformer and it is not rational to supply power to AC resistance welding machines of medium and high power from a higher frequency inverter. |
News |
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