| 2006 №04 (02) | 2006 №04 (04) |
The Paton Welding Journal, 2006, #4, 17-20 pages
Energy characteristics of low-amperage arcs
K.A. Yushchenko, N.O. Chervyakov, P.P. Kalina
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Energy characteristics of low-amperage arcs were studied. It was established that the low-amperage arcs in argon-arc welding are characterised by a higher (3–5 times) concentration of heat flow, compared with arcs in plasma-arc cladding. Heat input and heat flow concentration are the main parameters allowing a wide-range control of the weld pool formation and strained state of the HAZ metal.
Keywords: argon-arc welding, plasma-arc cladding, effective thermal power, effective efficiency of heating of workpiece, heat flow distribution, heat input
References
1. Savchenko, V.S., Yushchenko, K.A., Makhnenko, V.I. (1993) Effect of physical characteristics of cast nickel heatresistant alloys on development of thermodeformational processes in fusion welding. Avtomatich. Svarka, 11, 6–9.2. Sorokin, L.I., Lukin, V.I., Bagdasarov, V.I. (1997) Weldability of cast heat-resistant nickel alloys of JS6 type. Svarochn. Proizvodstvo, 6, 12–17.
3. Savchenko, V.S., Yushchenko, K.A., SavoleJ, N.I. et al. (1993) Peculiarities of welding of high-nickel dispersionhardened heat-resistant alloys and repair of products made from them. Avtomatich. Svarka, 10, 31–33.
4. Prokhorov, N.N. (1976) Physical processes occurring in metals during welding. Vol. 2: Internal stresses, strains and phase transformations. Moscow: Metallurgiya.
5. Demyantsevich, V.P., Mikhajlov, N.P. (1973) Study of microplasma arc heat distribution in displacement of heating spot from axis of the Joint. Svarochn. Proizvodstvo, 6, 1–3.
6. Gladky, P.V. (1999) Thermal characteristics of the cladding plasmatron arc. Avtomatich. Svarka, 1, 13–17.
7. Rykalin, N.N. (1951) Calculations of thermal processes in welding. Moscow: Mashgiz.
8. (1978) Welding in machine-building. Refer. Book. Ed. by N.A. Olshansky. Moscow: Mashinostroenie.
9. Glickstein, S.S., Frieman, E., Yenischvich, W. (1975) Investigation of alloy 600 welding parameters. Welding J., 4, 113–122.
10. Lee, S.-Y., Na, S.-J. (1996) A numerical analysis of a stationary gas tungsten welding arc considering various electrode angles. Ibid., 9, 269–279.
11. Yushchenko, K.A., Savchenko, V.S., Chervyakov, N.O. et al. (2002) Study of deformation process peculiarities in welding of nickel alloys with limited weldability. In: Proc. of Int. Conf. on Mathematical Modeling and Information Technologies in Welding and Related Processes (Katsiveli, Crimea, Ukraine, Sept. 16–20, 2002). Kiev: PWI.
12. Eagar, T.W., Tsai, N.-S. (1983) Temperature fields produced by traveling distributed heat sources. Welding J., 12, 346--354.
13. Liu, W., Tian, X., Zhanc, X. (1996) Preventing weld hot cracking by synchronous rolling during welding. Ibid., 9, 297–304.
14. Kalina, P.P., Yarovitsyn, A.V., Yushchenko, K.A. (2005) Peculiarities of the microplasma powder cladding process. The Paton Welding J., 4, 7–13