Contents of the Paton Welding Journal
no. 7, 2010 |
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Boris Paton – Laureate of the Global Energy Prize |
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SCIENTIFIC AND TECHNICAL |
Kuchuk-Yatsenko S.I., Shvets V.I., Shvets Yu.V., Taranova T.G. and Gordan G.N. Causes for crack formation in the HAZ of cast high-manganese steel in flash-butt welding |
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Results of investigations of the causes of cracks forming in the HAZ of cast high-manganese steel 110G13L in its flash-butt welding to austenitic steel 08Kh18N10T are presented. It is shown that cracking is caused by segregational heterogeneity of distribution of phosphorus, which occurs both in solidification of castings and in the solid solution under thermal deformation conditions of welding. To prevent cracking, it is recommended to pay special attention to the process of homogenizing annealing of 110G13L castings. |
Makhnenko V.I. and Romanova I.Yu. Probabilistic characteristics of high-cycle fatigue resistance of structural steel welded joints |
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Issues of probabilistic determination of resistance of welded joints to high-cycle fatigue fracture are considered. The probability of failure-free performance of the joints for different types and variable values of applied loads is analysed. |
Ryabtsev I.A., Kondratiev I.A., Vasiliev G.V., Zhdanov V.A. and Babinets A.A. Investigation of structure and service properties of deposited metal for reconditioning and strengthening of rolling rolls |
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Structure and service properties of deposited metal designed for strengthening and reconditioning of various-purpose forming rolls have been studied. Metal deposited with flux-cored wire PP-AN132 has the highest high-temperature resistance, hot hardness and wear resistance at metal-on-metal friction at high temperatures, however, it has the lowest thermal stability. Metal deposited with flux-cored wire PP-AN130 has the highest thermal stability, although it is inferior to other materials as to a number of other indices. Metal deposited with flux-cored wire PP-AN147 takes an intermediate position by all the indices. |
Khorunov V.F., Maksymova S.V. and Stefaniv B.V. Effect of tin additions on structure and technological properties of brazing filler metals of the Ag-Cu-Zn system |
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The effect of tin and silicocalcium additions on structure, melting temperature ranges and spreading of alloy of the Ag-Cu-Zn system was investigated. It was found that cadmium-free brazing filler metals are characterised by good performance and provide strength properties of the joints close to those provided by brazing filler metal PSr-40. |
Pismenny A.S., Prokofiev A.S., Pismenny A.A., Novikova D.P., Yukhimenko R.V., Polukhin V.V., Ptashinskaya I.I. and Polukhin Yu.V. Properties of the welded joints of tubular billets produced by pressure braze-welding with a forming device |
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The paper generalizes the results of assessment of the influence of a forming device on properties of a circumferential butt joint forming in solid-state pressure butt braze-welding of tubular billets. Chemical elements distribution and phase composition were studied in the weld metal and the adjacent zone. |
Gedrovich A.I., Tkachenko S.A. and Galtsov I.A. Evaluation of stress-strain state of dissimilar welded joints from 10KH13G18D + 09G2S steels |
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The features of determination of residual welding stresses on full-scale samples from 10Kh13G18D + 09G2S dissimilar steels are considered. A dependence is established between the size of the zone of plastic strains and longitudinal residual welding stresses on the applied technologies of gas-shielded welding, modes and heat inputs. Positive influence of the technology of cold metal transfer on residual stresses and dimensions of plastic strain zones in dissimilar steel joints is conformed. |
INDUSTRIAL |
Kuchuk-Yatsenko S.I., Kachinsky V.S., Ignatenko V.Yu., Goncharenko E.I. and Koval M.P. Magnetically-impelled arc butt welding of pipes of steel X70 |
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The paper gives the resuets of investigation of weldability of pipes from X70 steel for application in pipelines for various purposes, as well as the results of metallographic and mechanical property investigations of welded joints. |
Savitsky M.M., Pismenny A.S., Savitskaya E.M., Pritula S.I. and Babenko S.K. Technology and equipment for manufacture of high-pressure cylinder bodies of sheet rolled steel |
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At the E.O. Paton Electric Welding Institute the design and technology have been developed for manufacture of combined high-pressure cylinders with a mass-dimensional factor M/V Ã 0.65 kg/l, designed for use in motor-vehicle transport. The cylinder consists of a pressurized body and a strengthening composite sheath. To manufacture the cylinder body, welded of thin-sheet steel, a specialized assembly-welding equipment and technology of precision welding, subsequent inspection and heat-treatment of welded joints were developed. Production lines of up to 20000 and 100000 cylinders per year with their safety factor above 2.6 were created. |
Seyffarth P. Modern equipment for shipbuilding |
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Experience of IMG GmbH Company (Rostok, Germany) in development and manufacture of modern automated lines for cutting and marking of shaped sections for shipbuilding and related industries is described. The lines provide high precision of part manufacturing and processing speed, this allowing payback of their procurement costs within a year and a half. |
Pervukhin L.B., Pervukhina O.L. and Bondarenko S.Yu. Cleaning and activation of welded surfaces during explosion welding |
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Absence of the cumulative effect in explosion welding of large-sized samples and commercial size plates in the modes used in commercial production is experimentally proved. The mechanism of cleaning and activation of surfaces ahead of the contact point is proposed, based on the hypothesis of formation of thin layers of low-temperature plasma in the welding gap on the interface between the shock-compressed gas and surfaces being welded. It is suggested than formation of strong bonds between atoms of the joined metals in explosion welding should be regarded as a three-stage process. |
NEWS |
8th International Conference on Beam Technology-2010 |
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XIV International Specialised Exhibition «Welding-2010» |
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Fifth International Conference «Mathematical Modelling and Information Technologies in Welding and Related Processes» |
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Session of the scientific council on new materials at the natural sciences committee of the international association of the academies of sciences |
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Specialized Forum «Paton Expo 2010» |
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