Actual Problems in Machine Building. Vol. 10. N 3-4. 2023 Materials Science in Machine Building ____________________________________________________________________ 62 13. Минкова И.О. Структура и магнитные свойства нанокомпозитов на основе железа, синтезированных в процессе объемного азотирования методами высокотемпературного спекания и механосплавления: дисс. … канд. техн. наук: 05.16.09. – М., 2021. – 166 л. 14. Строение поверхностных слоев и коррозионная устойчивость высокодисперсного железа, полученного механическим измельчением в органических средах / С.Ф. Ломаева, А.М. Дорфман, А.М. Ляхофич и др. // Химия в интересах устойчивого развития. – 2002. – № 10. – С. 143–50. 15. Крагельский И.В. Трение и износ. – М.: Машгиз, 1962. – 479 с. HEAT-RESISTANT AND WEAR-RESISTANT IRON-COPPER COMPOSITE MATERIALS FOR PARTS OF HEAVY-LOADED FRICTION PAIRS Plotnikov V.V., Ph.D. student, e-mail: acc_plotnokov@tambler.ru Shalunov E.P., Ph.D. (Engineering), Professor, e-mail: shalunov2003@mail.ru Smirnov V.M., Ph.D. (Physics and Mathematics), Associate Professor, e-mail: vms53@inbox.ru Millin A.B., Ph.D. student, e-mail: alexandrmillin@live.ru I.N. Ulianov Chuvash State University, 15 Moskovsky Prospekt, Cheboksary, 428015, Russian Federation Abstract The paper indicates the initial powder materials, methods for obtaining iron-copper composite materials from it and methods for studying its structure and determining the main physical, mechanical and operational properties, which are given as a range of its minimum and maximum values for all options for varying its chemical composition. In particular, these materials have a hardness of 225–255 HB, a recrystallization temperature of 900–965 °C, a thermal conductivity equal to 32.3–38.2% of the thermal conductivity of copper, a coefficient of linear thermal expansion — (13.6–13.8)10-6 and wear rate at contact pressure between tribounit elements of 100 MPa — 3.7710-8…2.010-8. The materials have a dispersion-strengthened structure. The given values of properties and the nature of its structure make it possible to attribute these materials to heat-resistant and wear-resistant composite materials, which may be of interest from the point of view of its use in parts of heavy-loaded friction pairs. Keywords Composite material, loads, contact pressure, wear, friction, fine particles, heat resistance, wear resistance.
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