Production of Castings with Differentiated Surface Properties
Problems. Surface layers get the most intensive external influences during the operation of molded parts of machines and mechanisms, therefore their structure and properties determine the operability of products as a whole. To achieve high surface strength and durability of parts, various technological processes are used in the industry, but most of them do not make it possible to obtain a surface layer with the desired properties of the required thickness. In this case, more promising can be the technological process of surface alloying (the manufacture of products with differentiated surface properties).
Objective. The aim of the paper is to develop a technological process for the production of castings with specified surface properties.
Methods. Each core was coated with an alloying coating, coated cores were dried in the air during the day, the mold and cores were heated and collected just before pouring them with metal.
Results. It is necessary to use ferromanganese, ferrotitanium and ferrochrome for the manufacture of wear-resistant parts, which allow obtaining on the casting surface an alloyed layer with a thickness up to12 mm and hardness up to 68 NRA. Such process parameters fully meet the operational requirements for products that operate under abrasive or water abrasion wear.Conclusions. To increase the hardness of the working surfaces, certain chemical elements, ferroalloys and chemical compounds such as carbides, borides and nitrides can be used as fillers of alloying coatings.
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M.A. Guriev et al., “The technology of applying multi-hardening coatings on steel parts”, Polzunovskij Vestnik, no. 1, pp. 73–78, 2012 (in Russian).
N.V. Martyushev, “On the possibility of doping the surface of castings nanopowders”, Sovremennye Problemy Nauki i Obrazovanija, no. 4, pp. 122–129, 2013 (in Russian).
М.М. Yamshinskij et al., “Modern technological aspects of manufacturing castings from differentiated surface properties”, Naukovi Visti NTUU KPI, no. 6, pp. 21–26, 2004 (in Ukrainian).
M.A. Guriev and G.A. Okolovich, “Surface hardening of steel parts with lost foam casting”, Polzunovskij Vestnik, no. 2, pp. 102–106, 2010 (in Russian).
O.S. Fatoba et al., “Optimization of carburized UNS G10170 steel process parameters using taguchi approach and response surface model (RSM)”, J. Minerals and Materials Characterization and Engineering, vol. 2, no. 6, pp. 566–578, 2014. doi: 10.4236/jmmce.2014.26058
A.M. Babakr et al., “Sigma phase formation and embrittlement of cast iron-chromium-nickel (Fe-Cr-Ni) alloys”, J. Minerals and Materials Characterization and Engineering, vol. 7, no. 2, pp. 127–145, 2008. doi: 10.4236/jmmce.2008.72011
M.M. Yamshinskij et al., “Improving the production of castings technology with differentiation properties of the surface”, Visnyk DDMA, no. 3, pp. 14–19, 2006 (in Ukrainian).
R.R. Moreira et al., “Moreira. Electrochemical investigation of corrosion on AISI 316 stainless steel and AISI 1010 carbon steel: Study of the behaviour of imidazole and benzimidazole as corrosion inhibitors”, Adv. Chem. Eng. Sci., vol. 4, no. 4, pp. 503–514, 2014. doi: 10.4236/aces.2014.44052
A.K. Raj, “On high-temperature materials: a case on creep and oxidation of a fully austenitic heat-resistant superalloy stainless steel sheet”, J. Materials, vol. 2013, Article ID 124649, 2013. doi: 10.1155/2013/124649
D.C. Oliver and M. Sephton, “External corrosion resistance of steel and ferritic stainless steel exhaust systems”, J. South African Institute of Mining and Metallurgy, March, pp. 93–100, 2003.
M.M. Yamshinskij et al., “The Exploration of coating binders for surface alloying of castings in the form”, Metall i Lit'e Ukrainy, no. 9, pp. 17–20, 2012 (in Ukrainian).
L.A. Dobrzański et al., “Corrosion resistance of sintered duplex stainless steel evaluated by electrochemical method”, J. Achiev. Materials Manufacturing Eng, vol. 19, no. 1, pp. 38–45, 2006.
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