Obrabotka Metallov 2019 Vol. 21 No. 1

OBRABOTKAMETALLOV Vol. 21 No. 1 2019 80 MATERIAL SCIENCE References 1. Girshovich N.G. Kristallizatsiya i svoistva chuguna v otlivkakh [Christalization and properties of iron in casts]. Moscow, Mashinostroenie Publ., 1966. 562 p. 2. Chigarev V.V., Rassokhin D.A., LozaA.V. Izmenenie struktury i svoistv litogo metalla legirovaniem v otlivkakh iz chuguna i stali [Modification of the structure and properties of cast metal by means of alloying in castings, made of iron and steel]. Vіsnik Priazovs’kogo derzhavnogo tekhnіchnogo unіversitetu. Seriya: Tekhnіchnі nauki = Reporter of the Priazovskyi State Technical University . Technical sciences , 2010, iss. 21, pp. 61–66. 3. Gabets D.A., Markov A.M., Gabets A.V. Issledovanie vliyaniya khimicheskogo sostava i struktury na mekhanicheskie svoistva chuguna ChMN-35M [Investigation of chemical composition and material structure influence on mechanical properties of special cast iron]. Aktual’nye problemy v mashinostroenii = Actual problems in machine building , 2017, vol. 4, no. 4, pp. 100–106. 4. BelyakovA.I., Petrov L.A, Kaminskij V.V., Akhunov T.A., Ershov V.P. Making spheroidal graphite cast iron by the LS-process. Liteinoe proizvodstvo = Foundry. Technologies and Equipment , 1997, no. 5, pp. 20–21. Study of the Influence of Alloying Elements on the Structure and Properties of Gray Cast Iron Operating under Conditions of Shock-Friction Wear Denis Gabets a , Andrei Markov b I.I. Polzunov Altai State Technical University, 46 Lenina avenue, Barnaul, Altai region, 656038, Russian Federation a https://orcid.org/0000-0003-0304-4407, gabets22@mail.ru, b https://orcid.org/0000-0002-3101-9711 , andmarkov@inbox.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 1 pp. 70–81 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.1-70-81 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 15 March 2018 Revised: 28 November 2018 Accepted: 10 December 2018 Available online: 15 March 2019 Keywords : Alloying and modification of cast iron Shock-frictional wear Wear resistance Martensite Alloying with nickel Alloying with molybdenum Wear resistant cast iron Graphite ABSTRACT Introduction. The solution on improving the speed and volume of cargo transportation by railway transport is connected with increased requirements to critical parts of the rolling stock. One of such details is a side bearing cap. The cap is installed on the support in the truck bolster and designed to hold a car body of the lateral forces. Method . The previous studies have shown that gray cast iron, in particular, SCH35 grade, is an effective material with satisfactory performance properties under high loads. Gray cast iron contains graphite which in the frictional couples can serve as cutting oil. However, these properties are not always sufficient for the buffing loading conditions, subjected to the slid bearing cap. Results and Discussion. Achieved results and the patent search allowed declaring the resulting iron as an invention (patent number 2562554). In the course of the investigation, it is possible to establish the influence of the concentration of alloying elements of nickel and molybdenum on the mechanical properties of the developed cast iron. The quality of the new iron and its characteristics are assessed within laboratory and stand tests. Polished sections analysis of non-etching samples allowed identifying graphitic phase. Study of metal matrix has shown that metal backing of the cast iron has perlite alongside with acicular perlite. Besides, this iron CHMN-35M metal matrix has perlite-ferritic metal backing. As reflected by the results, in all combinations iron of CHMN-35M grade has shown the best (approximately in 1.5 times) wear resistance in comparison with SCH35 iron. Therefore, the total value of accumulative wear (hob and shaft wear) in couples with CHMN-35M iron is also lower. For citation: Gabets D.A., Markov A.M. Study of the influence of alloying elements on the structure and properties of gray cast iron operating under conditions of shock-friction wear. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 1, pp. 70–81. doi: 10.17212/1994-6309-2019-21.1-70-81. (In Russian). ______ * Corresponding author Gabets Denis A. , Research Engineer, I.I. Polzunov Altai State Technical University, 46 Lenina avenue, Barnaul, Altai region, 656038, Russian Federation Tel.: 89635332000, e-mail: gabets22@mail.ru