Siberian State Industrial University, Novokuznetsk, Russia

R. E. Kryukov, Dr. Eng., Associate Prof., Prof., Dept. of Metallurgy of Ferrous Metals and Chemical Technology, e-mail: rek_nzrmk@mail.ru
A. R. Mikhno, Postgraduate Student, Director of the Scientific and Production Center “Welding Processes and Technologies”, e-mail: mikno-mm131@mail.ru
I. A. Panchenko, Cand. Eng., Senior Researcher, Dept. of Scientific Research, e-mail: i.r.i.ss@yandex.ru
S. V. Konovalov, Dr. Eng., Prof., Vice-Rector for Scientific and Innovation Activities, e-mail: konovalov@sibsiu.ru

Using the method of electric arc surfacing under a layer of flux, studies were carried out on the production of an alloy using flux-cored wire of the Al-Co-Cr-Fe-Mn system. In laboratory conditions, flux-cored wire was produced containing powders: chromium PH-1S according to TU 14-1-1474-75, manganese MR-0 according to GOST 6008-82, aluminum ASD-4 according to TU 1791-99-019-98, cobalt PC -1у according to GOST 9721-79. By automatic surfacing under a layer of AN-348A grade flux, a full-profile sample was manufactured for further research: determining the chemical composition of the alloy, conducting a study of microhardness, nanohardness and Young’s modulus, conducting mechanical tests for impact strength and tensile, identifying patterns in the formation of the microstructure of samples depending on on the distance from the fusion zone using transmission electron microscopy. As a result of scientific research, it was determined that the alloy obtained during the study has increased hardness compared to the substrate, however, the high hardness of the resulting alloy is accompanied by the fragility of the material, which is confirmed by the results of mechanical tests. An electron microscopic study of the alloy revealed that the alloy near the surfacing surface is characterized by a two-phase structure consisting of lath and lamellar martensite and individual ferrite grains. It is shown that a change in the rate of crystallization and cooling in the fusion zone of the surfacing and the substrate led to an increase in the volume fraction of the martensite phase and an increase in its dispersity and defectiveness. The results obtained during the study indicate the prospects of using the resulting alloy in the manufacture of wear-resistant coatings and products.
The authors express their gratitude to their colleagues for the financial support of the study by the Russian Science Foundation. The study was supported by the Russian Science Foundation grant No. 23-29-00350, https://rscf.ru/project/23-29-00350/.

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