The Paton Welding Journal, 2026, №05

2026 №05 (03)

DOI of Article 10.37434/tpwj2026.05.04

2026 №05 (05)

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The Paton Welding Journal, 2026, #5, 24-28 pages

Influence of thermochemical reactions in the metal-mineral core of flux-cored wire on wire melting characteristics at arc welding

V.V. Holovko, O.S. Kotelchuk

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: alexa_kot@ukr.net

Abstract
Results of studying powdered materials and their mixtures by the methods of complex thermal analysis of their physical and chemical properties that simulate the cores of flux-cored wires of carbonate-fluoride type are given, and the results of mass-spectral study of the gas phase during their dynamic heating up to steel melting point are analyzed. These research results are correlated with the indices of flux-cored wire melting. Heat effects of thermochemical reactions (endothermic processes of destruction, dissociation and melting, as well as exothermic processes associated with oxidation and formation of complex compounds) that take place during flux-cored wire heating at the wire extension are evaluated. An example is given of the possibility of controlling these reactions through a change in the mixture composition, which allows regulating the core melting rate, achieving favorable flux-cored wire melting characteristics and increasing the efficiency of electrode metal transfer to weld pool is presented.
Keywords: welding, low-alloy steel, flux-cored wire, metal-mineral charge, thermochemical reactions

Received: 02.10.2025
Received in revised form: 24.11.2025
Accepted: 19.05.2026

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Suggested Citation

V.V. Holovko, O.S. Kotelchuk (2026) Influence of thermochemical reactions in the metal-mineral core of flux-cored wire on wire melting characteristics at arc welding. The Paton Welding J., 05, 24-28. https://doi.org/10.37434/tpwj2026.05.04

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