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 brandching 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
L. S. Lyakhovich and L. G. Voroshnin, Boriding of Steel [in Russian], Metallurgiya, Moscow (1967), p. 47.
G. V. Samsonov et al., "Boriding of pressing tools and dies," in: Chemicothermal Treatment of Alloys [in Russian], BPI, Minsk (1971), p. 102.
A. N. Minkevich, Chemicothermal Treatment of Metals and Alloys [in Russian], Mashinostroenie, Moscow (1965), p. 263.
Additional information
Zhdanov Branch, Pochvomash Design-Construction-Technological Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 66–67, March, 1977.
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Alimov, Y.A. Structure of boride diffusion coatings on steels. Met Sci Heat Treat 19, 234–235 (1977). https://doi.org/10.1007/BF01167011
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DOI: https://doi.org/10.1007/BF01167011