Automatic Welding, 2024, №02



2024 №02 (07)

DOI of Article 10.37434/as2024.02.01

2024 №02 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2024, pp. 3-11

Study of the influence of GMAW-CMT and PULSE processes of additive deposition of silicon bronze CuSi3Mn1 on the geometric characteristics of the surface, structure and stress strain state of finished products

A.O. Perepichay, I.M. Lahodzinskyi

NTUU «Igor Sikorsky Polytechnic Institute». 37 Beresteyskiy Ave., 03056, Kyiv, Ukraine. E-mail: perepichayandrey@gmail.com

Silicon bronzes of CuSi3Mn1 type (BrKMts3-1) are widely used in the machine-building, aerospace, and mining industries due to their properties. Given the rather high cost of copper-based non-ferrous alloys, the use of wire-arc additive manufacturing (WAAM) technologies is relevant. Cold Metal Transfer (CMT) and pulse arc surfacing (Pulse process) are used to prevent overheating and reduce the heat input during surfacing of copper-based alloys. The results of studies of layer-by-layer surfacing of silicon bronze indicate a certain dependence of geometric characteristics, structural composition, and susceptibility to defect formation on the applied surfacing method (GMAW-CMT/Pulse). Short-circuit surfacing provides a greater height of each bead than with pulse current supply (up to 25 %) and a reduction in the width of each bead, respectively. However, the surface unevenness also increases. The sample deposited by the GMAW-Pulse method contains critical defects in the form of transverse cracks. The stress-strain state modeling for the pulse surfacing method indicates a critical accumulation of normal tensile stresses, which, in combination with the anisotropic structure of the metal, may be the cause of crack formation. 16 Ref., 2 Tabl., 10 Fig.
Keywords: WAAM, GMAW, Cold Metal Transfer, pulse arc surfacing, additive technologies, CuSi3Mn1, layer-by-layer surfacing


Received: 06.12.2023
Received in revised form: 15.01.2024
Accepted: 23.02.2024

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