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
Guangdong Institute of Welding (China-Ukraine E.O. Paton Institute of Welding). 363 Chiansin Str., 510650, Guangzhou, Tianhe.
E.O.Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
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,
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