Features of structure formation in antifriction composite powder infiltered with copper alloy material based on iron (pseudo-alloy) under high-temperature thermomechanical treatment

Author:

Dyachkova L. N.1ORCID,Vytiaz P. A.2ORCID,Zverko A. A.3

Affiliation:

1. Academician O. V. Roman Powder Metallurgy Institute

2. Department of Aerospace Activity of the Apparatus of the National Academy of Sciences of Belarus

3. Belarusian National Technical University

Abstract

The results of studies of the structure formation process in an iron-based antifriction composite powder material infiltrated with a copper alloy (pseudo-alloy) during thermal and high-temperature thermomechanical treatment (HTMT) are presented. It is shown that after infiltration the structure of the pseudo-alloy consists of sections of the steel skeleton with a perlite structure almost homogeneous in carbon and a small amount of cementite, sections of the copper phase located along the boundaries and at the joints of the particles of the steel skeleton, sulfide inclusions mainly in the copper phase. In the process of hardening, carbon is redistributed in the particles of the steel skeleton; a layer 2–5 µm thick with an increased carbon content is formed at the boundary with the copper phase. During HTMT, the structure is refined, a macrotexture is formed, and the thickness of the copper phase interlayers decreases, depending on the degree of deformation. The degree of deformation also affects the structure of the steel skeleton. After HTMT with a degree of deformation of 30 %, the structure consists of structureless martensite, troosto-martensite and residual austenite, and in the areas adjacent to the copper phase the carbon content is slightly lower, with a degree of deformation of 50 % – structureless martensite, 25 % more austenite content, more uniform distribution of carbon. It has been established that, due to the activation of diffusion processes during deformation during HTMT, molybdenum sulfides decompose and form iron and copper sulfides of various compositions; molybdenum alloys the iron base or forms carbide. The investigation results can be used in the development of high-strength antifriction materials for heavily loaded friction units.

Publisher

Publishing House Belorusskaya Nauka

Subject

Pharmacology (medical)

Reference30 articles.

1. Sorokin G. M. Problems of technical renewal of various branches of mechanical engineering. Friction and Wear, 2001, vol. 22, no. 3, pp. 322–331 (in Russian).

2. Garkunov D. N. Tribotechnics. Design, Manufacture and Operation of Machines. Moscow, Moscow Agricultural Academy named after K. A. Timiryazev, 2002. 626 p. (in Russian).

3. Burkovskaya N. P., Sevostyanov N. V., Bolsunovskaya T. A., Efimochkin I. Yu. Improvement of materials for sliding bearings of internal combustion engines (review). Trudy VIAM = Proceedings of VIAM, 2020, no. 1 (85), pp. 78–91 (in Russian). https://doi.org/10.18577/2307-6046-2020-0-1-78-91

4. Filippov M. A., Sheshukov O. Yu. Friction and Antifriction Materials. Yekaterinburg, Publ. House of the Ural State University, 2021. 204 p. (in Russian).

5. Kulagina G. S., Kan A. Ch., Zhelezina G. F., Levakova N. M. Antifriction materials based on polymer fibers. Trudy VIAM = Proceedings of VIAM, 2022, no. 11 (117), pp. 48–59 (in Russian). https://doi.org/10.18577/2307-6046-2022-0-11-48-59

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