Wuhan Textile University, Wuhan, China¹ ; Vladimir State University named after Alexander and Nikolay Stoletovs, Vladimir, Russia² ; National University of Science and Technology “MISIS”, Moscow, Russia³

V. B. Deev*, Dr. Eng., Expert Prof., Faculty of Mechanical Engineering and Automation¹, Chief Researcher², Prof., Dept. of Metal Forming³, e-mail: deev.vb@mail.ru

Engineering Construction Maintenance Ltd., Achinsk, Russia¹ ; Siberian Federal University, Krasnoyarsk, Russia²

S. L. Arapov, Chief Metallurgist¹; Junior Researcher², e-mail: arapovsl@yandex.ru

Siberian Federal University, Krasnoyarsk, Russia
A. A. Kosovich, Cand. Eng., Associate Prof., Dept. of Foundry, Senior Researcher, e-mail: akosovich@sfu-kras.ru
E. M. Lesiv, Cand. Eng., Associate Prof., Dept. of Foundry, e-mail: elesiv@sfu-kras.ru
 

*Correspondence author

This study is devoted to determining the optimal mode of heat treatment of highmanganese austenitic steel Fe–1.1C–16Mn–0.8Si–1.3Cr–Mo–Ni to improve the reliability of castings during operation under shock-abrasive wear. The microstructure and mechanical properties of samples subjected to heat treatment according to the mode applicable to alloyed analogues of 110G13L (Hadfield steel) were preliminary assessed: two-stage heating with holding at 600 and 1050 °C. The design of the state diagram of the studied material was carried out by the calculation method of thermodynamic phase transformations CALPHAD. The boundaries of the existence of carbide phases of the M7C3, M23C6 and M6C types in the temperature range from 0 to 1600 °C are established. Based on the analysis of the obtained data, the optimal mode of heat treatment was developed: three-stage heating with holding at 350 and 700 °C, followed by water quenching from a temperature of 1150 °C. In steel samples subjected to experimental processing, there is a decrease in grain size (23 %) and carbides (2 times), as well as an increase in impact strength (27 %) and abrasion resistance (3.7 %) with a decrease in hardness (4.8 %).
The work was carried out within the framework of the state assignment in the field of scientific activity of the Ministry of Science and Higher Education of the Russian Federation (topic FZUN-2020-0015, state assignment of VlSU).

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