The Assessment of the Possibility of Smelting a Cast Alloy for the Manufacture of Components and Parts of Arctic Technical Equipment Using Ore from the "Verkhnyaya Amga" Ore Occurrence

Abstract:

The research assesses the possibilities of using local minerals to create foundry alloys that are used in conditions of low temperature. The mineral-geochemical composition of iron ore from Verkhnyaya Amga ore occurrences in the Aldan region of the Sakha Republic (Yakutia) was studied in detail. The expedience of using iron ores from this ore occurrence to develop new cold-resistant and high-strength steels was analyzed. The chemical composition and microstructure of the cast alloys were studied. The ore contains oxides of alkaline earth metals: MgO; CaO; Sr0 and BaO, the total content of which is 4.2%, that contributes to the process of deoxidation of the melt during its cooling, and the deoxidation product in the form of oxides and other chemical compounds based on Ca, Sr and Ba floats into slag. During crystallization, the melt is cleaned of detrimental impurities, non-metallic inclusions, gases, pores, etc. Alloy is smelted from enriched ore, samples for static tension and toughness are made in order to study the physicomechanical properties. Microstructure of the obtained alloy and structural steel subjected to static tension at an external load of 0.8 yield strength (σ = 0,8 σ_т) was investigated. Mechanical properties and dynamic characteristics were measured. Analogues for comparing the strength and plastic properties were given.

• Periodical: Materials Science Forum (Volume 992)
• Pages: 561-566
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.992.561
• Online since: May 2020
• Authors: A.D. Danilov*, Ksenia V. Stepanova, P.P. Petrov
• Keywords: Alloy, Chemical Composition, Iron Ore, Mechanical Properties, Microstructure, Structure

References

[1] O.I. Sleptsov, P.P. Petrov, Prospects, problems and objectives of metallurgy in the Republic of Sakha (Yakutia) using local mineral raw materials, Eurastrencold 2018 Conf Materials. 1(2018) 72-81.

[2] D. McLean, Mechanical properties of metals, ed. Y.B. Friedman, Metallurgizdat, Moscow, (1965).

[3] V.E. Panin, E.F. Dudarev, L.S. Bushnev, Structure and mechanical properties of solid solutions of substitution, Metallurgy, Moscow, (1971).

[4] E.F. Dudarev, Microplastic deformation and yield strength of polycrystals, TSU, Tomsk, (1988).

[5] L.S. Moroz, Mechanics and physics of deformation and fracture of materials, Mashinostroenie, Leningrad, (1984).

[6] I.I. Yakovlev, Physical and mechanical foundations for the creation of cold-resistant structural materials based on iron with a given set of properties, Yakutsk Branch of the SB RAS, Yakutsk, (1993).

[7] O.I. Sleptsov, S.G. Moskvitin, P.P. Petrov, Features of the mineral-geochemical composition of metallurgical raw materials of Yakutia, Eurastrencold 2010 Conf Materials. 1(2010) 9-18.

[8] O.I. Sleptsov, B.S. Ermakov, S.G. Moskvitin, P.P. Petrov, V.V. Karginova, Prospects for the creation of high-strength cold-resistant steels from the naturally-alloyed ore of the Lena ore field, Himicheskaya Technologiya. 11 (2010) 755-760.

[9] B.S. Ermakov, V.V. Karginova, P.P. Petrov, S.B. Ermakov, Optimization of the chemical composition of cold-resistant steel by microalloying with strong carbo-nitride-forming elements, International scientific and technical Conf Materials (St. Petersburg, 27-29 Oct.). (2009) 19-26.

[10] V.V. Nemoshkalenko, V.N. Antonov, Electronic structure and X-ray emission spectra of intermetallic compounds with a CsCl structure (cesium - chlorine), Izvestiya vuzov, Phyzika. 12 (1982) 79-84.

DOI: 10.1007/bf00900292

[11] M.N. Georgiev, Toughness properties of low alloy steel with the addition of rare-earth metals, in: Toughness of mild steel, Metallurgizdat, 1973, Moscow, pp.204-209.

[12] B.S. Ermakov, Y.P. Solntsev, Low temperature properties of Fe - Mn system alloys, in: Strength of materials and structures at low temperatures, SPbGUNPT, St. Petersburg, 2003, pp.31-36.

[13] V.V. Rybin, E.I. Khlusova, E.V. Nesterova, M.S. Mikhaylov, The formation of the structure and properties of low-carbon low-alloy steel during thermomechanical treatment with accelerated cooling, Voprosy Materialovedeniya. 52 (2007) 329-340.

[14] G.E. Kodzhaspirov, V.V. Rybin, Ch. Apostolopoulos, The role of the mesostructure in the thermomechanical treatment of metal materials, Metal science and heat treatment. 619 (2007) 30-33.

DOI: 10.1007/s11041-007-0004-y

[15] Y.P. Solntsev, A.K. Andreev, A.E. Serditov, Cold-resistant and wear-resistant cast steels, Himizdat, St. Petersburg, (2007).

[16] I.A. Borisov, The effect of carbon, chromium and manganese on carbide transformations of Cr-Ni-Mo-V steels during tempering, Metal science and heat treatment. 19 (1990) 19-21.

DOI: 10.1007/bf00693336

[17] A.K. Andreev, Y.A. Smirnova, B.S. Ermakov, The effect of heat treatment on the structure and fracture resistance of cast cold-resistant steel, Eurastrencold 2014 Conf Materials. 1(2014) 64-67.

[18] J. Moore, Modification on the cast structure using rare earth addition, Proc. 37-th Steel Mac. Confer. Chicago Meet. Apt. 1- 4, 67 (1984) 239-254.

[19] R.K. Dwari, D.S. Rao, P.S. Reddy, Mineralogical and beneficiation studies of the low-grade iron ore sample, Journal of Institution of Engineers (India): Series D. 95 (2014) 115 -123.

DOI: 10.1007/s40033-014-0045-5

[20] S.J. Engineer, H. Gulden, H.W. Klein, V. Schüler, Entwicklung von mikrolegierten perlitischen Edelbaustählen mit verbesserten Zähigkeitseigenschaften, Stahl u. Eisen. 108, 19 (1988) 64-68.