| 2000 №08 (10) | 2000 №08 (12) |
The Paton Welding Journal, 2000, #8, 40-46 pages
Features of weld and HAZ formation in gas-shielded pulsed twin-arc welding in high-strength low-alloyed steels
N.M. Voropaj, P.P. Protsenko
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
The process of pulsed twin-arc welding is characterized by a separate feed of current pulses to electrically isolated consumable electrodes, the arcs of which form the common weld pool. Studies of the effect of parameters of twin-arc welding on the penetrating power of the arc, weld formation, sizes of the HAZ, structure and properties of welded joints in high-strength low-alloyed steels with improved thermal characteristics are described.
Keywords: twin-arc welding, current pulses, feed mechanism, power source, metal penetration, weld formation, thermal cycle, macrosections
References
1. (1974) Technology of electric fusion welding of metals and alloys. Ed. by B.E. Paton. Moscow: Mashinostroyeniye.2. Medovar, B.N. (1950) High-speed twin-arc automatic welding. Avtogen. Delo, 11, 20 - 23.
3. (1953) Automatic electric-arc welding. Ed. by B.E. Paton. Kyiv-Moscow: Mashgiz.
4. Paton, B.E. (1947) Welding heads and current supply to them. Kyiv: AN Ukr.SSR.
5. Mandelberg, S.L., Lopata, V.E. (1962) On connection of welding transformers in high-speed twin-arc welding. Avtomaticheskaya Svarka, 10, 20 - 23.
6. Paton, B.E., Mandelberg, S.L., Sidorenko, B.G. (1971) Some features of weld formation in higher-speed welding. Ibid., 8, 1 - 6.
7. Sidorenko, B.G., Mandelberg, S.L. (1988) Selection of the optimal number of electrodes in high-speed multi-arc welding. Ibid., 2, 53 - 55.
8. Mandelberg, S.L. (1965) High-speed multi-arc welding with transverse oscillations of the electrode. Ibid., 2, 8 - 13.
9. Fainberg, L.I., Rybakov, A.A., Mandelberg, S.L. (1975) CO2 twin-arc welding at a higher speed. Ibid., 2, 35 - 38.
10. Hackl, H. (1997) TIME TWIN - Schneller MSG - Schweissen mit zwei Drahtelektroden. Schweiss- und Prueftechnik, 5, 71 - 73.
11. (1998) New technological process of «Fronius» company. Avtomaticheskaya Svarka, 2, 69 – 70.
12. Killing, R. (1997) Das MAG-Mehrdrahtschweissen. Praktiker, 2, 243 - 245.
13. (1996) KUKA two-wire MAG welding system doubles welding speeds. Ind. Robot, 6, 42.
14. Lassaline, E., Zajaczkowski, B., North, T. (1989) Narrow groove twin-wire GMAW of high-strength steel. Welding J., 9, 53 - 58.
15. (1996) MIG/MAG-Hochleistungsschweissen mit TAN-DEM Technik. Schweissund Pueftechnik, 9, 150.
16. Voropay, N.M., Lesnykh, V.V., Mishenkov, V.A. (1994) Combined process of non-consumableand consumableelectrode arc welding and surfacing. Avtomaticheskaya Svarka, 4, 56 - 57.
17. Protsenko, P.P., Privalov, N.T. (2000) Technological properties of Sv-08KhG2SNMT electrode wire in gasshielded welding of high-strength low-alloyed steels. Ibid., 6, 18 - 23.
18. Dudko, D.A., Savitsky, A.M., Savitsky, M.M. et al. (1998) Features of thermal processes in welding with thermal cycling. Ibid., 4, 8 - 12.
19. Demchenko, Yu.V., Asnis, A.E., Ivashchenko, G.A. (1983) Influence of the thermal cycle erf welding on the properties of the HAZ of 16G2AF and 09G2S steel joints. Ibid., 11, 70 - 71.
20. Egorova, S.V., Sterenbogen, Yu.A., Yurchishin, A.V. et al. (1987) Weldability of low-alloyed steels strengthened by normalizing from an intercritical temperature range. Ibid., 2, 20 - 23, 31.