Global Nuclear Safety
National Research Nuclear University "MEPhI"
online version: ISSN 2499-9733
print version: ISSN 2305-414Х
2016-3(20)
Design, manufacturing and commissioning of nuclear industry equipment
| Article Name | The Mechanism of Connection Impact Strength Increase during Pulse Impact on the Welding Circuit in the Nuclear Power Complex |
|---|---|
| Authors | S.M. Burdakov |
| Address | Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University «MEPhI», |
| Abstract | BACKGROUND The processes of plastic deformation proceeding with different speed can take place at production and operation of responsible metal designs on the basis of heat resisting alloyed by steels in the nuclear power complex. A number of the used designs of their details and knots can be exposed to different deformation changes. Three samples for test for impact strength when welding with imposing of tension 80B with a frequency of 40 kHz and three samples without imposing of a pulse component were made. METHODS Multipass butt connection of steel plates 15 mm thick with imposing and without imposing on an arch of a direct current of tension 80B with a frequency of 40 kHz from the special generator at parallel connection to the main welding source was carried out by means of manual arc welding the electrode of TML-3U with a diameter of 4 mm. RESULTS The following results were received after carrying out mechanical tests. Average value of impact strength for samples without imposing of a pulse component is 24 kgf∙ m/ cm2, and for samples when welding with imposing of tension 80B with a frequency of 40 kHz is 26,6 kgf∙ m/ cm2. CONCLUSIONS It is possible to tell that the electromagnetic field with a frequency of 40 kHz provides metal structure formation of welded seam with higher rates of impact strength. |
| Keywords | responsible metal designs, processes of plastic deformation, stability of the arc category burning, mechanical properties, dynamic loadings, impact strength, crushing of dendrites, defects of welded connection, electromagnetic field, metal structure of welded seam, high-frequency fluctuations |
| Language | Russian |
| References | [1] Gromov Y.G. Teoriya obrabotki metallov davleniem [Theory of processing of metals pressure]. M. Pub. “Metallurgy” [Metallurgy publishing house], 1978, 361 p. (in Russian) [2] Volchenko V.N. Kontrol kachestva svarki [Welding quality control]. M. Pub. "Mashinostroenie" [Mashinostroenie publishing house], 1975, 328 p. (in Russian) [3] Chernov A.V., Poletaev Yu.V., Kavrishvili Z.O., Burdakov S.M. Povyshenie ustoychivosti goreniya dugi pri svarke pokrytymi elektrodami [Increasing the stability of arcing in welding with coated electrodes]. Welding fabrication, 2000, №2(783), ISSN 0491-6441, pp. 7–9. (in Russian) [4] Burdakov S.M., Chernov A.V., Poletaev Yu.V., Polezhaev S.V. Fizicheskaya model elektricheskogo dugovogo razryada s nalozheniem vysokochastotnogo napryazheniya [Physical model of electric arc discharge with the application of high-frequency voltage]. Welding fabrication, 2001, №11(804), ISSN 0491-6441, pp. 13–16. (in Russian) [5] GOST 9466–75. Elektrody pokrytye metallicheskie dlya ruchnoy dugovoy svarki staley i naplavki. Klassifikatsiya i obshchie tekhnicheskie usloviya [Covered metal electrodes for manual arc welding of steels and deposition. Classification and general specifications]. M. Pub. "Standartinform" [Standartinform publishing house], 2007, 25 p. (in Russian) [6] GOST 6996-66 (ISO 4136-89, ISO 5173-81, ISO 5177-81). Svarnye soedineniya. Metody opredeleniya mekhanicheskikh svoystv [Welded joints. Methods of mechanical properties determination]. M. Pub. "Standartinform" [Standartinform publishing house], 2006, 44 p. (in Russian) [7] GOST 5264-80. Ruchnaya dugovaya svarka. Soedineniya svarnye. Osnovnye tipy, konstruktivnye elementy i razmery [Manual are welding. Welding joints. Main types, design elements and dimensions]. M. Pub. "Standartinform" [Standartinform publishing house], 2005, 33 p. (in Russian) [8] Burdakov S.M., Chernov A.V., Poletaev Yu.V., Polezhaev S.V., Prokopenko V.V. Povyshenie ustoychivosti dugovogo razryada i kachestva soedineniy pri svarke pokrytymi elektrodami [Increase of stability of the arc category and quality of connections when welding by the covered electrodes] [Works of the conference Volgodonsk institute of Novocherkassk state technical university "New methods of theoretical and pilot studies of materials, devices and technologies"]. Novocherkassk. Pub. "Nabla" [Volgodonsk institute of Novocherkassk state technical university], 2001, pp. 111–115. (in Russian) [9] Boldyrev A.M. O mekhanizme formirovaniya struktury metalla shva pri vvedenii nizkochastotnykh kolebaniy v svarochnuyu vannu [About the mechanism of formation of structure of metal of a seam at introduction of low-frequency fluctuations to a welding bathtub]. Welding fabrication, 1976, №2(496), ISSN 0491-6441, pp. 52–55. (in Russian) |
| Papers | 51 - 56 |
| URL Article | URL Article |
| Open Article |