Karaganda Technical University (Karaganda, Kazakhstan):

Sv. S. Kvon, Cand. Eng., Prof., e-mail: svetlana.1311@mail.ru
V. Yu. Kulikov, Cand. Eng., Prof.
S. K. Arinova, Ph. D., Lecturer, e-mail: sanya_kazah@mail.ru
E. P. Shcherbakova, Ph. D., Senior Lecturer, e-mail: sherbakova_1984@mail.ru

The authors express their gratitude to D. R. Aubakirov, a doctoral student, senior lecturer of the Department of Nanotechnology and Metallurgy, for participating in this work.

The paper presents the results of studying the microstructure and phase composition of an experimental heatresistant alloy based on the Fe-Cr-Ni-alloying element system intended for manufacturing of components for metallurgical equipment. Samples of an experimental alloy were prepared for research. Electron microscopy using X-ray mapping was used as a research method. X-ray phase analysis was performed to verify the phase identification. Influence of alloying elements on formation of intermetallic strengthening phases in an experimental alloy is considered. It is shown that the alloy matrix is represented by a γ-solution by the type of substitution and interstitial phases of Ni₃Al, MeC. The existence of a new intermetallic phase Me₂B, identified taking into account the chemical composition of the alloy, as (Nb, Mo)₂B, has been identified and experimentally proved. This phase is represented by significantly smaller inclusions. Microstructural and X-ray spectral analysis of the samples confirmed the presence of the above phases. It has been shown that the presence of this phase in the structure has a positive effect on the value of longterm strength. Furnace roller tables were cast from smelted experimental steel in normal operation.

This research has been is funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan AP09058350 «Developing and implementing the technology of producing chrome anti-friction cast iron for components of mining equipment».

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