Obrabotka Metallov 2013 No. 4

ОБРАБОТКА МЕТАЛЛОВ № 4 (61) 2013 17 МАТЕРИАЛОВЕДЕНИЕ 27. Жаропрочные стали и сплавы / Ф.Ф. Химу- шин. – М.: Металлургия, 1969. – 752 с. 28. Davydov V.M . Improvement of coating quality obtained by electro spark alloying with nonabrasive ul- Obrabotka metallov N 4(61), October–December 2013, Pages 12-18 Structure and properties of functional coatings produced by electrospark deposition of a steel 20X13 I.A. Astapov, K.P. Eremina, M.A. Teslina, S.N. Khimukhin, V.V. Gostishchev Institute for Material Studies Far Eastern Branch of Russian Academy of Sciences, Tikhookeanskaya st., 153, Khabarovsk, 680042, Russia E-mail: immaterial_khv@mail.ru Received 21 October 2013 Revised 20 November 2013 Accepted 22 November 2013 Abstract Temperature-resistant coatings obtained from Ni-Al alloys of various compositions on the steel by the method electrospark deposition are obtained. The phase and elemental compositions of the obtained alloys and coatings are investigated. The dependence of the heat resistance on the original composition and structure of the Ni-Al al- loys are revealed. It is shown for the first time that the functional coatings formed during steel 20Х13 treatment by electrode materials consisting of 66,9 Ni…32,9 Al and 79,3 Ni…20,1 Al have the greatest continuity and thick- ness, and also phases NiAl and Ni 3 Al are formed in its structure. Data obtained in this paper show that the method of electrospark deposition on the surface of structural steel gives opportunity to get heat-resistant coatings of Ni- Al alloys of different composition with high hardness, that retain its mechanical properties after thermal cycling at elevated temperatures. Keywords: microstructure, functional coating, electrospark deposition, heat-resisting alloy, microhardness References 1. Sims Ch.T., Hagel W.C. The superalloys . New York, Wiley-Interscience, 1972. 614 p. (Russ. ed.: Sims Ch., Hagel’ V. Zharoprochnye splavy . Moscow, Metallurgija, 1976. 568 p.). 2. Sauthoff G. Intermetallics. Weinheim; New York; Basel; Cambridge; Tokyo; VCH, 1995. 165 p. 3. Reed R.C. The Superalloys: Fundamentals and Applications. Cambridge University Press, 2008. 392 p. 4. Durocher J. Richards N.L. Characterization of the Micro-Welding Process for Repair of Nickel Base Superalloys. Journal of Materials Engineering and Performance. 2007, Vol. 16, no. 6, pp. 710-719. 5. Tan X.P., at al. Characterization of topologically close-packed phases in secondary reaction zone in a coated CMSX-4 single crystal Ni-based superalloy. Journal of Materials Science. 2013, Vol. 48, Issue 3, pp. 1085-1089. 6. Paul S. Harvey M.D.F. Corrosion Testing of Ni Alloy HVOF Coatings in High Temperature Environments for Biomass Applications. Journal of Thermal Spray Technology. 2013, Vol. 22, Issue 2-3, pp. 316-327. trasonic finishing polishing/ V.M. Davydov, S.N. Kh- imukhin, E.A. Ledkov, A.V. Gil // 3-rd International conference on Manufacturing engineering. Kallithea of Chalkidiki, Grece, 1-3 October, 2008. – C. 199–204.