Contents of the Paton Welding Journal
no.8, 2008 |
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Page |
| SCIENTIFIC AND TECHNICAL |
Makhnenko V.I., Kvasnitsky V.V. and Ermolaev G.V. Stress-strain state of diffusion bonds between metals with different physical-mechanical properties | 2 |
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Regularities were established in the effect exerted by plastic strains on formation of the stress-strain state in diffusion bonding of pieces of dissimilar materials in the form of cylinders and sleeves under compression and variable temperature conditions. It is shown that the lowest level of plastic strains and their unfavourable distributions along the axis of cylinders and sleeves take place in bonding of materials under compression and constant temperature conditions. |
Maly A.B. Improvement of ChS-104 nickel-base alloy weldability by optimization of heat treatment mode | 7 |
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The paper deals with weldability of a high-temperature nickel-base alloy with dispersion strengthening. It is shown that the alloy cracking resistance can be increased by optimization of the heat treatment mode before welding and lowering the cooling rate after welding. |
Golovko L.F., Anyakin M.I., Ehsan O., Novikov N.V., Shepelev A.A. and Sorochenko V.G. Application of laser technology for sintering of the tool composites containing diamonds | 10 |
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The analysis of problems and results of researches in the field of non-isothermal sintering methods of the diamonds containing composites are presented in this paper. Results of experimental study of the influence of a laser irradiation on qualitative characteristics of diamonds, on physical and chemical processes on the diamond-sheaf border are submitted; the data indicating the existence of certain set of the regimes of laser irradiation that preserve the initial durability of diamonds, and some certain regimes that lead to the crack formation, oxidation and other negative processes are presented. Some problems of the development of the technology of coupled thermal and deformational laser sintering of composites, means of its realization, results of theoretical and experimental studying of the thermal processes that occur at liquid-phase sintering, basic technological parameters are discussed in detail. Results of practical realization of the developed process are shown. |
Razmyshlyaev A.D. and Mironova M.V. Peculiarities of base metal penetration in arc surfacing in longitudinal magnetic field | 18 |
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It is shown that in surfacing in constant longitudinal magnetic field (LMF) of 50 Hz frequency depth and area of the base metal penetration reduce if longitudinal component of induction exceeds 50Ä60 mT level. In case of wire surfacing, rarefaction forms in LMF on the arc axis. Constant and variable magnetic field of 50 Hz frequency exerts braking action on velocity of molten metal flows in the pool, and this is one of main factors that cause reduction of depth of the base metal penetration in submerged arc surfacing with wire. |
Tsybulkin G.A. On the influence of small paramerters on MIG/MAG welding stability | 22 |
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The paper gives the results of analytical and experimental investigation of dynamic processes running in the welding circuit, and more precisely defines the area of asymptotic stability of steady-state arc welding modes. |
| INDUSTRIAL |
Kirichenko V., Gryaznov N. and Krivtsun I. Experimental facility for research on pulsed laser-microplasma welding | 26 |
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Functional structure of a technological complex for hybrid (laser-microplasma) welding with application of a solid-state Nd:YAG laser, operating in a repetitively pulsed mode with wide range of energy and pulse shape, and integrated direct-action coaxial plasmatron is designed. Suggested algorithms of synchronizing operation of pulsed heat sources for study of joint action from positions of required welding properties achievement give the opportunity to obtain experimental results of laser-microplasma welding process with mild steel for automobile industry, aluminium alloy processing, and nanomaterials sintering. |
Mozzhukhin A.A. On theory of solution of invention tasks | 30 |
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The theory of solution of invention tasks includes method of inversion (re-arrangement) of the known elements of devices to obtain new properties. Below the method of «turning inside out» is suggested, which expands or complements capabilities of the inversion. |
| BRIEF INFORMATION |
News | 35 |
Theses for a scientific degree | 38 |
