Browsing by Author "Suvorova E."

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    INFLUENCE OF Fe-Si-Mg-REM-INOCULANTS ON THE MICROSTRUCTURE OF IRON CASTINGS WITH VERMICULAR GRAPHITE
    (2022-01-01) Boldyrev D.; Nefedyef S.; Dema R.; Kharchenko M.; Chernyi S.; Suvorova E.; Mihailov E.; Latypov O.; Yordanova R.
    Complex additives, inherently, are not only inoculants, but also complex alloyed products having their own specific structure, whose influence on the crystallization processes of an alloy is actually not taken into account or studied. The work investigates inoculants made by two technologies. According to the first technology, an inoculant is made in the form of an ingot by crystallizing melt in a mold, according to the second technology, an inoculant is made in the form of an extra-thin ingot (0.5 - 3 mm thick plates) by continuous casting and freezing on water-cooled molds (drums). A phase electron and X-ray spectral analysis of the inoculants’ structure are carried out to produce vermicular graphite iron. Thus, the paper presents a research on the microstructure of CGI castings “Countershaft” molded in a ladle with the use of inoculants and describes specific features of their influence
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    The electron-microscopic and X-ray spectral analysis of phase composition of CGI inoculant structure
    (2019-01-01) Boldyrev D.; Shapovalov A.; Nefedyef S.; Dema R.; Kononov V.; Kharchenko M.; Suvorova E.; Markova I.
    The paper presents an analysis of both the phase and chemical compositions as well as the structure of 3 types of inoculants having a similar chemical composition but produced by two completely different technological processes. All investigated inoculants serve to produce vermicular graphite iron of a similar chemical composition. A qualitative identification of inoculant particles phase composition and surface microanalysis is carried out by electron-microscopic examination and X-ray spectral microanalysis. The investigations used can serve as an effective way of inoculants ranking according to their qualitative and performance characteristics.