2020 №04 (03) DOI of Article
2020 №04 (05)

The Paton Welding Journal 2020 #04
TPWJ, 2020, #4, 25-29 pages
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, Ye.V. Illyashenko2 and D. Cai1
1Guangdong Institute of Welding (China-Ukraine E.O. Paton Institute of Welding) 363 Chiansin Str., 510650, Guangzhou, Tianhe, China
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 laser-plasma welding of 3 mm SUS304 stainless steel, 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 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 influenced 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 mode parameters and shielding gas composition, allows replacing up to 40 % of the laser power by plasma power. The strength of joints of SUS304 stainless steel produced by hybrid laser-plasma welding is equal to approximately 95 % of that of the base metal. 8 Ref., 1 Table, 7 Figures.
Keywords: laser-plasma welding, stainless steel, synergistic effect, process experiments, penetration depth, power ratio, shielding gas

Received 05.02.2020


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