PHYSICAL AND MECHANICAL PROPERTIES OF SYSTEM ALLOYS Al-Co-Cr-Fe-Mn and Co-Cr-Fe-Mn-Ni OBTAINED BY METHOD OF ARC SURFADING OF FOX-Cored Wire
YJEFWU
DOI:
https://doi.org/10.25712/ASTU.2072-8921.2025.03.025Keywords:
flux-cored wire, arc welding, microhardness, high-entropy materials, microstructure.Abstract
In the conditions of the research and production center "Welding Processes and Technologies", research samples of flux-cored electrode wires of the aluminum - cobalt - chromium - iron - manganese and cobalt - chromium - iron - manganese - nickel system were manufactured. The production of electrode wire of the aluminum - cobalt - chromium - iron - manganese system was carried out by filling a shell of 08PS steel. Electrode wire of the cobalt - chromium - iron - manganese - nickel system is made by filling a shell of steel 12Х18Н9. The filler of the manufactured flux-cored wires were the following alloying components: chromium powder with a chromium content of at least 98.5 %; metallic manganese with a manganese content of at least 99.7 %; aluminum chips; cobalt electrolytic powder with a cobalt content of at least 99 %; nickel carbonyl powder with a nickel content of at least 99.5 %. Using the method of automatic electric arc welding under a layer of flux OK FLUX 10.71 (ESAB), the manufactured electrode wires were deposited onto 9MnSi5 steel. A series of samples were made from the surface of deposited samples using electrical discharge cutting to study the distribution and absorption of chemical elements, conduct tensile tests, impact strength, and study microhardness. The obtained results of the distribution and assimilation of chemical elements indicate that the samples deposited with electrode wires have about 60-70 % Fe and 30-40 % of the introduced alloying components. The coating obtained by fusing electrode wire of the aluminum - cobalt - chromium - iron - manganese system is quite hard, but at the same time fragile (the microhardness of the deposited layer is two times higher than that of the substrate - 9MnSi5 steel). The alloy obtained by fusing electrode wire of the cobalt - chromium - iron - manganese - nickel system allows us to obtain a deposited layer that is 15 % harder than the substrate. At the same time, the resulting alloy has fairly high impact strength and tensile strength.
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