MIREA - Russian Technological University, Moscow, Russia

E. S. Kozik, Cand. Eng., Associate Prof., Dept. of Nanoelectronics, e-mail: ele57670823@yandex.ru

Orenburg State University, Orenburg, Russia

E. V. Svidenko, Cand. Eng., Associate Prof., Dept. of Materials Science and Technology, e-mail: tzvetkova.katia2016@yandex.ru

When alloying cast iron with chromium, solid solutions with α- and γ-iron are formed, and with a content of more than 3 % to 7 % chromium, complex carbides such as Me₇C₃, Me₂₃C₆ and the intermetallic phase Fe-Sg, called the σ-phase. With a Cr content of 0.25-0.6 %, the tendency of cast iron to carbonization and bleaching increases, while at the same time strength, hardness, heat resistance, resistance to scale formation and growth, wear and corrosion resistance increase, especially with complex alloying with other elements: silicon, nickel, molybdenum, copper and aluminum. In high-chromium cast irons with a carbon and silicon content of less than 1.5 % each, the chromium distribution between the phases does not depend on the modification of the melt and the types of heat treatment, there is only a slight decrease in the content of carbides of the cementite type, while increasing the chromium content due to the decomposition of iron carbide. The purpose of this work is to improve the performance properties of IChKh12M by heat treatment. The purpose of this work is to improve the performance properties of IChKh12M by heat treatment. In order to fulfill all the tasks set, it was decided to carry out the planned stages of heat treatment on samples from a plate of cast iron IChKh12M.

1. GOST 7769-82. Alloy cast iron for castings of special properties. Grades. Introduced: 01.01.1983.
2. Pranav U., Agustina M., Mücklich F. A. Comparative study on the influence of chromium on the phase fraction and elemental distribution in as cast high chromium cast irons: simulation vs. experimentation. Metals. 2020. No. 12. pp. 4–17.
3. Kozik E. S., Svidenko E. V. Improving the performance properties of SCh20 cast iron by supersonic gas-dynamic spraying of RotoTec metal powder. Chernye Metally. 2024. No. 11. pp. 86–90.
4. Tsypin I. I. White wear-resistant cast irons. Structure and properties. Moscow : Metallurgiya, 1983. 176 p.
5. Petrochenko E. V. Features of forming of structure and properties of complex-alloyed white irons depending on different types of heat treatment. Chernye Metally. 2012. No. 1. pp. 10-14.
6. Garber M. E. Wear-resistant white cast irons: properties, structure, technology, operation. Moscow : Mashinostroenie, 2010. 280 p.
7. Malakhov A. Yu., Karelina M. Yu., Perekrestov A. E. Study of automotive parts made of cast iron. Problemy ekspertizy v avtomobilno-dorozhnoy otrasli. 2022. No. 2 (3). pp. 3–24.
8. Mirzaev D. A., Koryagin Yu. D., Kulikov A. A., Sozykina A. S. Heat treatment of castings from white wear-resistant cast iron. Vestnik Yuzhno-Uralskogo gosudarstvennogo universiteta. 2013. Vol. 13. No. 2. pp. 111–115.
9. Zhumaev A. A. Results of comparative studies of wear-resistant white cast irons. Mekhanika i tekhnologiya. 2024. No. 3. pp. 75–83.
10. Boldin A. N. Problems of obtaining high-strength cast iron from secondary resources for mechanical engineering. Zagotovitelnye proizvodstva v mashinostroenii. 2009. No. 12. pp 3–5.
11. ASTM A 842:11А. Standard Specification for Compacted Graphite Iron Castings. United States, Pennsylvania, West Conshohocken : ASTM International. 2022. 5 p .
12. Baranovsky K. E., Mansurov Yu. N., Zhumaev A. A., Duvalov P. Yu. Increasing the service life of parts made of wear-resistant chromium cast iron. Metallurgy: republican interdepartmental collection of scientific works. 2019. Iss. 40. pp. 78–83.
13. Dudetskaya L. R., Pokrovsky A. I., Gaukhshteyn I. S., Demin M. I., Gurchenko P. S. Bainitic cast iron: experience of production and application. Avtomobilnaya promyshlennost. 2011. No. 11. pp. 33–35.
14. Pokrovsky A. I., Dudetskaya L. R., Gaukhshteyn I. S., Demin M. I., Gurchenko P. S. Deformation of cast iron castings in the manufacture of mechanical engineering parts. Avtomobilnaya promyshlennost. 2019. No. 7. pp. 30–33.
15. Kolokoltsev V. M., Petrochenko E. V., Molochkova O. S. Influence of boron modification and cooling conditions during solidification on structural and phase state of heat- and wear-resistant white cast iron. CIS Iron and Steel Review. 2018. Vol. 15. pp. 11–15.
16. Pokrovsky A. I., Chaus A. S., Kunovsky E. B. Influence of the graphite inclusions shape on acoustic characteristics of products made of cast and deformed cast iron. Metallovedenie i termicheskaya obrabotka metallov. 2011. No. 7. pp. 3–10.
17. ASTM A47/A47M-1999. Standard Specification for Ferritic Malleable Iron Castings. United States, Pennsylvania, West Conshohocken : ASTM International. 2022. 5 p.
18. Malakhov A. Yu., Likhacheva T. E., Petrov L. G. Materials science and technological aspects of destruction of internal combustion engine crankshafts. Naukoemkie tekhnologii v mashinostroenii. 2021. No. 2 (116). pp. 41–48.