PSI - Issue 81

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ScienceDirect

Procedia Structural Integrity 81 (2026) 353–359

© 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers Keywords: arc surfacing; deposited metal; metal powder-cored wire; modification; granulometric composition; wear resistance; heat resistance; microstructure. 1. Introduction The modern development of technologies for the restoration and strengthening of machine parts and mechanisms is based on the extensive use of alloyed electrode materials in the form of solid and flux-cored wires, strips, and covered electrodes. As shown by many researchers, in particular in the works of Pokhodnya et al. (2010), Kuskov (2019), and Khatibi (2019), the use of alloyed electrode materials ensures an increase in the service life of parts operating under conditions of intensive wear, cyclic mechanical and thermal loads, as well as corrosive effects. At the same time, the possibilities of traditional alloying of electrode Abstract The influence of the granulometric composition and the content of boron carbide (B ₄ C) micro-additives in the core of metal powder-cored wires (MPW) on the characteristics of the electric arc surfacing process, the quality of bead formation, and the microstructure of the multilayer deposited metal, as well as its heat resistance and wear resistance, has been investigated. Wires with a diameter of 1.8 mm were manufactured for experiments to obtain wear- and heat-resistant steel grade 50Cr2Ni2MoVSi. As a reference, a wire without modifying additives and with a standard granulometric composition (50 –300 µm) was used. Modification was carried out by introducing B ₄ C powder into the core of the MPW. It was found that the addition of 0.01 wt.% B ₄ C refines the structure of the deposited metal by a factor of 2.5, increases hardness by 10%, and delays the initiation of cracks, thereby improving heat resistance and wear resistance by 15 – 20%. Increasing the B ₄ C content to 0.02 – 0.1 wt.% raises the hardness of the deposited metal by 25%, however leads to intensive formation of solidification cracks. The use of more homogeneous and fine-dispersed powder fractions in the MPW core (50 –100 µm) improves melting stability, promotes the formation of a fine-grained structure, and ensures defect-free metal. VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Effect of Core Particle Size Distribution and Boron Carbide Additives in Metal-Cored Wires on the Structure and Properties of the 50Cr2Ni2MoVSi-type Deposited Metal Anatolii Babinets a , Taras Maydanchuk b * , Mykhailo Voron с a The State Scientific and Technical Center for Nuclear and Radiation Safety (SSTC NRS), 35-37 V. Stusa Str., 03142, Kyiv, Ukraine b E.О. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine с Physical and Technological Institute of Metals and Alloys, of the National Academy of Sciences of Ukraine, 34/1 Acad. Vernadskogo Av., 03142, Kyiv, Ukraine

* Corresponding author. Tel.: +38-096-194-34-33; fax: + 38-044-205-23-98. E-mail address: pwi_37@ukr.net

2452-3216 © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers 10.1016/j.prostr.2026.03.061