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Title of the article INFLUENCE OF ANNEALING ON THE STRUCTURAL-PHASE STATE AND PROPERTIES OF GAS-THERMAL Al-Fe-Cr-Ni PSEUDOALLOY COATING OBTAINED BY THE METHOD OF HIGH-SPEED SPRAYING OF WIRE MATERIALS
Authors

ASTRASHAB Evgeniy V., Junior Researcher of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BELOTSERKOVSKY Marat А., D. Sc. in Eng., Prof., Head of the Laboratory of Gas-Thermal Methods of Machine Components Hardening, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GRIGORCHIK Alexander N., Ph. D. in Eng., Deputy Head of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KUKAREKO Vladimir A., D. Sc. in Phys. and Math., Prof., Chief of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2021
Issue 4(57)
Pages 71–77
Type of article RAR
Index UDK 621.793
DOI https://doi.org/10.46864/1995-0470-2021-4-57-71-77
Abstract The structural-phase state and durometric properties of gas-thermal Al-Fe-Cr-Ni pseudoalloy coatings have been studied. It is found that the sprayed coating is characterized by low porosity (up to 5 vol.%), low content of the austenite phase and iron and aluminum oxides. It is shown that the pseudoalloy hardness is HV10, and its microhardness is 450 HV0.025. The subsequent annealing of the composite coating in the temperature range of 350–550 °С leads to the precipitation of a large amount of strong intermetallic phases Fe13Al4 and Al5Fe2 in it. At the same time, the maximum hardness (220–230 HV10) of the Al-Fe-Cr-Ni coatings is recorded after annealing at 450 and 500 °C for 3–4 h, the maximum microhardness values (580–620 HV0.025) — after annealing at 500 and 550 °C for 2 h. Long-term exposure of coatings at elevated temperatures (500 and 550 °C) leads to a significant increase in their porosity (up to 20–50 vol.%).
Keywords pseudoalloy, annealing, structural-phase state, porosity, durometric properties
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