METALLOGRAPHIC ANALYSIS OF NON-METALLIC INCLUSIONS IN SEMI-KILLED STEEL (GRADE 25G2S) DEOXIDIZED WITH A COMPLEX ALLOY Fe-Si-Mn-Al
Zhuniskaliyev T. Kyatbay Y. Mukhambetgaliyev Y. Kusainova G. Abdirashit A.
30 September 2024Technical University of Kosice
Acta Metallurgica Slovaca
2024#30Issue 3137 - 141 pp.
This study presents a metallographic analysis of non-metallic inclusions in steel samples obtained from six different heats of the oxygen converter shop at JSC Qarmet and under laboratory conditions at the Karaganda Industrial University. The investigation focused on semi-killed steel samples deoxidized using traditional technology under industrial conditions and with a complex alloy containing Fe-Si-Mn-Al under laboratory conditions, aiming to identify the types and assess the level of contamination by non-me-tallic inclusions. The results revealed the presence of various types of non-metallic inclusions, such as corundum, chromite spinel, chromium oxides, titanium nitrides and carbonitrides. The degree of contamination by non-metallic inclusions ranged from 2 to 3 points. The analysis showed that using a complex Fe-Si-Mn-Al alloy instead of traditional deoxidizers can affect non-metallic inclu-sions quantitative and qualitative composition. It was established that the complex alloy promotes the formation of more stable in-clusion phases, which can positively impact the mechanical properties of the steel. It was also found that different production tech-nologies and deoxidizers can significantly influence the quantity and types of non-metallic inclusions, requiring further study and optimization of technological processes. Therefore, the results of this study can be valuable for metallurgical enterprises in selecting optimal steel deoxidation methods and improving steel quality, as well as for further scientific research in the fields of metallurgy and materials science.
Complex alloy Fe-Si-Mn-Al , Metallographic analysis , Microstructural analysis , Non-metallic inclusions , Semi-killed steel
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Karaganda Industrial University, Department of Metallurgy and Materials Science, Republic Street No 30, Temirtau, 101400, Kazakhstan
Abishev Chemical-Metallurgical Institute, Laboratory of Steel Metallurgy and Materials Science, Ermekova street 63, Karaganda, 100009, Kazakhstan
Aktobe Regional University Named After K. Zhubanov, Department of Metallurgy and Mining, А. Moldagulova Street No. 34, Aktobe, 030000, Kazakhstan
Karaganda Industrial University
Abishev Chemical-Metallurgical Institute
Aktobe Regional University Named After K. Zhubanov
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