Automatic Welding, 2022, №02



2022 №02 (04)

DOI of Article 10.37434/as2022.02.05

2022 №02 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2022, pp. 33-36

Studies of coatings produced by high-velocity oxyfuel spraying using cermet powder based on FeMoNiCrB amorphizing alloy

Yu.S. Borisov, N.V. Vihilianska, I.A. Demіanov, A.P. Murashov, O.P. Grishchenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The process of producing composite powders based on amorphizing Fe-alloy with the additives of refractory compounds by the method of high-velocity oxyfuel spraying was investigated. For spraying composite powders FeMoNiCrB-(Ti, Cr)C, FeMoNiCrB-ZrB2 were used, produced from a mixture of powders of the compositions by mechanical alloying in a planetary mill. As a result of spraying, dense coatings (porosity is less than 3%) were produced, which were formed from partially deformed particles with a multiphase structure and a uniform distribution of structural components. The results of X-ray diffraction phase analysis indicate the formation of amorphous-crystalline structure in the produced composite coatings. On the radiographic patterns, the maximum peak amplitude from the crystalline phase against the background of the amorphous halo corresponds to the TiCN phase in the coating FeMoNiCrB-(Ti, Cr)C and the ZrB2 phase in the FeMoNiCrB-ZrB2 coating. The size of the measured microhardness for the composite coating FeMoNiCrB-(Ti, Cr)C amounts to – 5.5 ± 0.25 GPa, and for the coating FeMoNiCrB-ZrB2 it is 5.9 ± 0.29 GPa. 15 Ref., 2 Tabl., 3 Fig.
Keywords: high-velocity oxyfuel spraying, amorphous phase, amorphous iron-based alloy, composite powder, composite coating, microstructure, microhardness


Received: 22.11.2021

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