Ukrainian Journal of Mechanical Engineering and Materials Science

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Subject: search.filters.subject.flux-cored wire

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    Mathematical modelling of flux-cored layer formation
    (Видавництво Львівської політехніки, 2023-02-28) Kassov, Valery; Vasylchenko, Yana; Berezhnaya, Elena; Malyhina, Svetlana; Donbass State Engineering Academy
    Mathematical model for the calculation of the chemical composition of deposited metal with sufficient accuracy has been developed. The presented mathematical model has been developed taking into account shares of base and clad metal, the metal of the previous roll in the subsequent one, and the relative step of cladding. Based on the calculated composition of deposited metal by flux-cored wire it has been proved and experimentally confirmed that the required chemical composition of deposited metal is achieved in the second-third layer regardless of the surfacing step. Theoretically established and experimentally verified the effective relative step of cladding. The established relative pitch allows for minimizing waste when cladding with flux-cored wire. In this case, the cross-sectional area of the roll reinforcement after the finishing run will be minimal.
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    Mag-welding of repair structures of main gas pipelines
    (Publishing House of Lviv Polytechnic National University, 2016) Maksimov, Sergii; Oleinik, Oleg; Gavrilyuk, Anatoliy
    Investigations on the development of a basic technology of the shielded-gas mechanized arc welding of strengthening structural elements which are used in repair of main gas pipelines were carried out. It is shown that the advanced welding wires Sv08G2S, Е71Т-1, DW-50, DW-A55 are in compliance with the requirements for providing the necessary level of mechanical characteristics, impact toughness of weld metal, content of diffusive hydrogen in the deposited metal and can be recommended for application in the further testing of technology for repair of the operating pipelines under the field conditions. The carried out works resulted in the working out of documentation on the technology of mechanized arc welding in shielding gases in repair of main gas pipelines of Ukraine.