Contents of the Paton Welding Journal no.3, 2008 |
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Page |
| SCIENTIFIC AND TECHNICAL |
Kovalchuk V.S. Taking into account of high-frequency mechanical peening influence on cyclic working life of welded joints at double-frequency loading |
2 |
| Methodology, analytical dependences and nomograms for determining area of efficient use of hardening of the 09G2S steel welded joints by high-frequency mechanical peening and estimation of its influence on increase of cyclic working life at double-frequency loading are proposed. |
Makhnenko O.V. and Seyffarth P. Calculation prediction of overall distortions in laser welded beams |
6 |
| Mathematical model is described, which was developed for prediction of overall bending distortions of long beams in laser welding to optimise the distance between the fixing supports, at which deviation of the laser beam from the joint site is not in excess of the admissible value. |
Razmyshlyaev A.D., Mironova M.V. and Deli A.A. Effect of longitudinal magnetic field on characteristics of the arc in TIG welding in argon atmosphere |
13 |
| It is demonstrated experimentally, using the split anode method, that diameter of the active (anode) spot on a workpiece decreases with increase in induction of the longitudinal magnetic field within the arc zone, while distribution of density of the current along its radius is more uniform than in welding without the longitudinal magnetic field. It is shown by the probe method that gas-dynamic pressure at the arc centre decreases under the effect of the magnetic field. |
Khorunov V.F. and Maksymova S.V. Selection of filler metals for brazing thin-walled heat exchanging devices |
17 |
| Peculiarities of structure of seams in thin-sheet stainless steel joints produced by vacuum brazing using copper and nickel alloys as brazing filler metals are considered. Results of metallographic examinations and mechanical tests of the brazed joints are presented. Good prospects for utilisation of brazing filler metals based on the Ni??Mn system are demonstrated for brazing thin-walled structures, in particular, plate-ribbed heat exchangers. |
Grigorenko G.M., Kostin V.A. and Orlovsky V.Yu. Current capabilities of simulation of austenite transformations in low-alloyed steel welds |
22 |
| Mathematical models describing the CCT and TTT diagrams plotted for the welds on low-alloyed steels are analyzed with a purpose of their possible experimental verification in ??Gleeble-3800?? system for physical simulation of metal welding and heat treatment process. |
| INDUSTRIAL |
Barvinko A.Yu. Improvement of service reliability of double-wall welded tanks |
25 |
| The problem of improving the reliability of oil storage double-wall tanks is considered. It is shown that installing special bands at lower flanges of the main and auxiliary wall does not solve the problem in its full scope. It is suggested that reliability of the main wall should be improved by applying to assessment of rolled plate quality the deformation defect tip displacement criterion Kc which is met by the new generation of steels, i.e. controlled-rolling niobium-containing steels. Substantial improvement of toughness properties of the wall plates will guarantee detection and removal of defects in the main wall in the subcritical condition. |
Dmitrik V.V., Tsaryuk A.K. and Konyk A.I. Carbide phases and damageability of welded joints of steam pipelines under creep conditions |
28 |
| Regularities of ageing of welded joints of steam pipelines from heat-resistant 12Kh1MF steel operating under creep conditions are considered. A connection is established between the damageability of welded joints and the carbide transformation kinetics, and recommendations are given on optimization of the initial structure of base metal. |
| NON-DESTRUCTIVE TESTING |
Davydov E.A. Determination of crack dimensions in welded joints using ultrasonic diffraction waves |
32 |
| A feasibility of measurement of the height of crack-like discontinuities using diffraction of ultrasonic waves formed on the edges is considered. |
| FROM HISTORY OF WELDING |
Kornienko A.N. and Litvinov A.P. Transition to integrated development of welding production |
37 |
| Creation of an integrated program of welding production development by the initiative of Evgeny O. Paton in 1930??1932 is considered. Foundation of a research institution with the structure providing realization of scientific-and-technical ideas into specific technologies and equipment, as well as their commercial application, is described. Brief review of the priority science-intensive developments of the Electric Welding Institute, performed under the leadership of E.O. Paton, is given. |
| BRIEF INFORMATION |
Nazarenko O.K. Reduction of evacuation time of large-sized vacuum chambers of electron beam welding installations |
41 |
| Results of evacuation of the UL-132 commercial installation large-sized vacuum chamber of 20 m3 volume without application and with application of a system for freezing out water vapors are presented. It is found that time for evacuation of the vacuum chamber down to vacuum 2.66??10??4 Pa (2??10??4 mm Hg) in case of freezing out of water vapors reduces 2 times (from 40 to 20 min). |
News |
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Developed at PWI |
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