Conclusions
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1.
Fractographic analysis reveals the complex structure of boride coatings on steels and makes it possible to suggest a model for the formation of crystals with a branching root system, resulting in high strength of adhesion of the coating to the base metal.
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2.
This method permits more accurate (by 30–35%) measurements of the thickness of the coating as compared with metallographic analysis and reduces the difficulties and time required for the measurements under plant conditions.
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Literature cited
S. T. Konobeevskii, Izv. Akad. Nauk SSSR, Ser, Khim., No. 5, 1209 (1937).
S. T. Konobeevskii, Zh. Eksp. Teor. Fiz., 13, Nos. 11–12, 418 (1943).
Additional information
I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 63–66, March, 1977.
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Urazova, V.A., Krylova, L.M. & Smirnova, A.V. Effect of high-temperature heating on the size, number, and distribution of SiO2 and Al2O3 inclusions. Met Sci Heat Treat 19, 231–234 (1977). https://doi.org/10.1007/BF01167010
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DOI: https://doi.org/10.1007/BF01167010