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Contents of the issue
Avtomaticheskaya Svarka (Automatic Welding), #10, 2020, pp. 34-37
Development of new electrode materials, methods of restoration and protection of thin-walled parts of equipment, which are operated in the conditions of gas abrasive wear
M. M. Student, A.A. Voytovych, Ya.Ya. Sirak, V.M. Gvozdetsky, G.V. Karpenko
G.V. Karpenko Physical-Mechanical Institute of the NAS of Ukraine 5 Naukova Str., 79060, Lviv, Ukraine.
A wide range of parts and equipment of chemical, oil, agricultural, machine-building, transport, energy and other industries
are operated in abrasive conditions. In Ukraine, electric arc surfacing with flux-cored wires of the Fe – Cr – B – C system is
widely used to protect against abrasive wear and restore worn surfaces by surfacing. Such flux-cored wires have a low cost and
the deposited metal has a satisfactory wear resistance. However, the main disadvantage of the layers, deposited with such fluxcored
wires are dendrites of the first and second order with acicular morphology. Sharp peaks of the solid phase act as stress
concentrators, from which after impact the cracking of the deposited metal begins, followed by its chipping. It is known that
the formation of rounded reinforcing phases reduces the concentration of stresses in the deposited layer and, as a consequence,
increases wear resistance. This paper proposes the dispersion of structural components in the deposited metal by surfacing under
the action of mechanical vibration on the deposited metal, which is especially useful for manufacture of surfacing bimetallic
wear plates, and for large-sized parts a dispersion of structural components in the deposited metal Fe – B – C is proposed by
adding the powder of aluminum-magnesium master alloy PAM-4 to it. 5 Ref., 2 Tabl., 5 Fig.
Keywords: surfacing, bimetallic sheets, wear resistance, boride inclusions
1. Kuskov, Y.М., Zhdanov, V.А., Ryabtsev, І.О. et al. (2020) Methods for Increasing the Corrosion Resistance of Coatings Deposited under a Flux Layer from High-Chromium Powder Wires. Materials Science, 55, 5, 710-715. https://doi.org/10.1007/s11003-020-00362-9 2. Student, M., Vojtovych, A., Pokhmurska, H. et al. (2019) Mechanical characteristics and wear resistance of the cladding layers obtained by melting of cored wires with simultaneous vibration of substrate. Strojnicky Casopis, 69, 1, 109-122. https://doi.org/10.2478/scjme-2019-0009 3. Pokhmurs`ka, H.V., Student, M.M., Lanets`, O.S., Voitovych, A.A. (2015) Influence of Vibration in the Course of Surfacing of a Protective Layer on Its Microstructure and Impact- Abrasive Wear. Materials Science, 51, 3, 412-417. https://doi.org/10.1007/s11003-015-9856-2 4. Voitovych, A.A., Pokhmurs`ka, H.V., Student, M.M., Student, O.Z. (2016) Microstructure and abrasive-wear resistance of the vibration-deposited metal of core wires of the basic Fe-Cr-B system. Ibid, 52, 3, 365-370. https://doi.org/10.1007/s11003-016-9965-6 5. Pokhmurs`ka, H.V., Student, M.M., Dzyubyk, A.R. et al. (2017) Corrosion resistance of the metal vibration deposited from fluxcore wires based on the Fe-Cr-B system. Ibid, 52, 5, 694-699. https://doi.org/10.1007/s11003-017-0011-0