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2020 №04 (03) DOI of Article
10.37434/as2020.04.04
2020 №04 (05)

Automatic Welding 2020 #04
Avtomaticheskaya Svarka (Automatic Welding), #4, 2020, pp.29-33

Features of synergistic effect manifestation in laser-plasma welding of SUS304 steel, using disc laser radiation

V.Yu. Khaskin1, V.M. Korzhyk1, A.V. Bernatskii2, O.M. Voitenko2, Y.V. Illyashenko2, D. Сai1
1Guangdong Institute of Welding (China-Ukraine E.O. Paton Institute of Welding). 363 Chiansin Str., 510650, Guangzhou, Tianhe.
2E.O.Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

It is shown in the work that at laser-plasma welding of 3 mm stainless steel SUS304, using disc laser radiation, a stable manifestation of the synergistic effect and a ratio of powers of the laser and plasma components of 1:1 – 1:3 were found, that allows the penetration depth to be increased by approximately 25% without any change in the welding speed. The stability of the synergistic effect and increase of penetration depth are affected by the ratio of powers of the process components, method of feeding and composition of the shielding gas. In order to improve the hybrid welding effectiveness at coaxial feed of shielding and plasma gases, it is rational to use an additive of 2 – 3% oxygen to shielding gas argon. Stabilization of the synergistic effect due to selection of the mode parameters and shielding gas composition allows replacing up to 40% of the laser power by plasma power. The strength of joints of stainless steel SUS304, produced by hybrid laser-plasma welding, is equal to approximately 95% of that of the base metal. 8 Ref., 1 Tabl., 7 Fig.
Keywords: laser-plasma welding, stainless steel, synergistic effect, process experiments, penetration depth, power ratio, shielding gas

Received: 05.02.2020

References

1. Utsumi A., Matsuda J., Yoneda M., Katsumura M. (2002) Effect of base metal travelling direction on TIG arc behaviour. Study of high-speed surface treatment by combined use of laser and arc welding (Report 4). Welding International, 16, 7, 530-536. https://doi.org/10.1080/09507110209549571
2. Cho Won-Ik, Na Suck-Joo (2007) A Study on the Process of Hybrid Welding Using Pulsed Nd:YAG Laser and Dip-transfer DC GMA Heat Sources. J. of Welding and Joining, 25, 6, 71-77. https://doi.org/10.5781/KWJS.2007.25.6.071
3. Seyffarth P., Krivtsun I.V. (2002) Laser-arc processes and their applications in welding and material treatment. London, Taylor and Francis Books. (Welding and Allied Processes). https://doi.org/10.1201/9781482264821
4. Shelyagin V.D., Krivtsun I.V., Borisov Yu.S. et al. (2005) Laser-arc and laser-plasma welding and coating technologies. The Paton Welding J., 8, 44-49.
5. Kah P., Salminen A., Martikainen J. (2010) Laser-arc hybrid welding processes (Review). Ibid, 6, 32-40.
6. Naito Y., Mizutani M., Katayama S. (2003) Observation of Keyhole Behavior and Melt Flows during Laser-Arc Hybrid Welding. Proc. of International Congress of Applications of Laser and Electro-Optics, ICALEO, 2003, Jacksonville (USA). Jacksonville, LIA, Section A, pp. 159-167. https://doi.org/10.2351/1.5059966
7. Krivtsun, I.V., Korzhik, V.N., Khaskin, V.Yu. et al. (2017) New generation unit for laser-microplasma welding. In: Proc. of 8th Int. Conf. on Beam Technologies in Welding and Materials Processing. Ed. by I.V. Krivtsun. Kiev, IAW, 95-100.
8. William de Abreu Macedo, Vinicius de Oliveira Correia (2006) Gas composition for arc welding. Praxair Technology, Inc., Danbury, CT (US). Pat. US 7071438 B2: B23K9/73.
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