Automatic Welding, 2021, №12



2021 №12 (01)

DOI of Article 10.37434/as2021.12.02

2021 №12 (03)

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Avtomaticheskaya Svarka (Automatic Welding), #12, 2021, pp. 18-26

Features of laser-plasma welding of corrosion-resistant steel aisi 304 using laser

V.M. Korzhyk¹, V.Yu. Khaskin¹, A.A. Grynyuk², E.V. Illyashenko², A.V. Bernastkyi², S.I. Peleshenko³

¹China-Ukraine E.O. Paton Institute of Welding of the Guangdong Academy of Sciences. Guandong Key Laboratory of Advanced Welding Technologies, Guangzhou, China
²E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: offi ce@paton.kiev.ua
³NTUU «Igor Sikorsky Kyiv Polytechnic Institute» 37 Peremohy Ave., Kyiv

The paper confi rms the presence of synergic eff ect at laser-plasma welding, using fi ber laser, by comparing the cross-sectional areas of beads deposited in AISI 304 plate (δ = 4 мм) by laser, plasma, and hybrid processes at close power values of laser radiation and plasma arc (~2 kW each). It is determined that the manifestation of this eff ect depends on welding speed. At the speed of 2 m/min the hybrid bead cross-sectional area can exceed the sum of areas produced with the laser and plasma processes by up to 30%, and for the speed of 4 m/min by ~20 %. Comparison of input energy of the laser and hybrid processes of stainless steel welding showed that the diff erence between them depends on the welded sheet thickness (or penetration depth). This value fi rst decreases from ~100 % for sheets with δ = 2 mm to 50 % for sheets with δ = 6 mm, and at further increase of penetration depth it rises to 60 %. The nature of dependencies of the factor of area ratio φ, weld geometry К and penetration depth Ф on the speed of hybrid welding of AISI 304 steel allows recommending the range of speeds of 1.5…2.0 m/min, as a more acceptable by the criteria of synergic eff ect and penetration depth. It is found that at hybrid welding with application of fi ber laser radiation, the plasma component promotes elimination of such defects of weld upper bead formation, characteristic for laser welding, as undercuts and a ridge, etc. 19 Ref., 2 Tabl., 10 Fig.
Keywords: hybrid laser-plasma welding, fi ber laser, stainless steel, synergic eff ect, penetration depth, energy input


Received: 18.10.2021

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