The Paton Welding Journal, 2006, №02

2006 №02 (05)

2006 №02 (07)

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The Paton Welding Journal, 2006, #2, 26-29 pages

Improvement of weld strength in arc welding of al-cu alloys with application of sc-containing fillers

A.G. Poklyatsky, A.V. Lozovskaya, A.A. Grinyuk, M.R. Yavorskaya, A.A. Chajka

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Comparative analysis of mechanical properties of deposited metal produced by using filler wires of Sv1201 type with different content of copper and scandium has been performed. It is shown that addition of 0.5 % Sc to welding wires creates prerequisites for an extra increase in tensile strength and proof stress of the welds. Methods are suggested to provide an extra increase of the strength of welded joints and weld metal directly during the welding process by passing current through a section of the filler and using postweld heat treatment by a special mode.
Keywords: arc welding, aluminium-copper alloys, scandium-containing fillers, welded joints, filler wire preheating, quenching, heat treatment, mechanical properties

References

1. Lozovskaya, A.V., Chajka, A.A., Bondarev, A.A. et al. (2001) Softening of high-strength aluminium alloys in different fusion welding processes. The Paton Welding J., 3, 13–17.
2. Lukin, V.I. (1996) Sc as a promising alloying element for filler materials. Svarochn. Proizvodstvo, 6, 13–14.
3. Elagin, V.I., Zakharov, V.V., Rostova, T.D. (1982) Future application of scandium additives to aluminium alloys. Tsvet. Metally, 12, 96–99.
4. Ishchenko, A.Ya., Lozovskaya, A.V., Poklyatsky, A.G. et al. (1999) Structure and properties of joints produced in welding AMg6 alloy using filler wires with scandium. Avtomatich. Svarka, 4, 19–25.
5. Ishchenko, A.Ya., Lozovskaya, A.V., Poklyatsky, A.G. et al. (2002) Increase in strength of welds in arc welding of alloy 1420 using Sc-containing fillers. The Paton Welding J., 1, 10–14.
6. Zakharov, V.V., Rostova, T.D. (1995) Scandium addition to aluminium copper-containing alloys. Metallovedenie i Term. Obrab. Metallov, 2, 23–27.
7. Poklyatsky, A.G., Ishchenko, A.Ya., Grinyuk, A.A. et al. (2002) Non-consumable electrode argon-arc welding of aluminium alloys with arc oscillations. The Paton Welding J., 2, 18–22.
8. Poklyatsky, A.G., Lozovskaya, A.V., Grinyuk, A.A. (2002) Prevention of formation of oxide films in welds of Li-containing aluminium alloys. Ibid., 12, 39–42.

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Suggested Citation

A.G. Poklyatsky, A.V. Lozovskaya, A.A. Grinyuk, M.R. Yavorskaya, A.A. Chajka (2006) Improvement of weld strength in arc welding of al-cu alloys with application of sc-containing fillers. The Paton Welding J., 02, 26-29.

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