Conclusions
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1.
High values of scaling resistance correspond to certain values of electronegativity whose change to either side entails impaired corrosion properties of high speed steels.
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2.
When 1–2% Si is added to the low alloy steel R3M3F2, its resistance to high-temperature oxidation increases by 25–30%. When this steel contains up to 0.005% B, its scaling resistance increases by about 10%.
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3.
The results of the determination of the layerwise phase composition of the scale of steel R3M3F2 with different silicon content, carried out by the method of NGR spectroscopy, showed that the corrosion resistance increases chiefly because fayalite phase (Fe2SiO4) forms in the layer of scale adjacent to the base metal and because of the presence of finely disperse (x-ray amorphous) segregations of oxide phases.
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Literature cited
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F. K. Egorov, G. A. Teterin, E. M. Menchuk, et al., "Study of the kinetics of the dissolution of Fe2O3 and Sc2O3 by the method of Mössbauer spectroscopy," Ukr. Khim. Zh.,51, No. 11, 1139–1141 (1985).
Additional information
All-Union Tool Research Institute (VNIIinstrument). Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 2–6, August, 1988.
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Aparova, A.I., Alekseev, L.A. & Lyapunov, A.I. Effect of silicon and boron on the scaling resistance of steels. Met Sci Heat Treat 30, 559–563 (1988). https://doi.org/10.1007/BF00778256
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DOI: https://doi.org/10.1007/BF00778256