The effect of thermal treatment of the melt before crystallization on the structure and properties of castings

• Autorzy: Kondratyuk S. Ye. , Veis V. I. , Parkhomchuk Z. V.

Identyfikatory

DOI

10.5604/01.3001.0014.3866

• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the proposed research is to investigate the influence of temperature and duration of isothermal melt processing on structural characteristics of castings in connection with technological background of charge metal. Design/methodology/approach: Ferrous and non-ferrous alloys were obtained by remelting a charge with a dispersion-structured structure (which was ensured by high- speed crystallization). Remelting was carried out at different temperatures of overheating of the melt over the liquidus with different isothermal exposure at these temperatures. Experimental castings were crystallized under normal conditions. It was studied a change of structure formation and mechanical characteristics depending on the temperature and duration of thermal treatment of the melt before crystallization. Findings: It is established that isothermal treatment of the melt at the overheating of the liquid metal above a certain equilibrium temperature of the micro-inhomogeneous melt (Te) causes a gradual loss of hereditary characteristics of the original charge metal, increase of the chemical homogeneity of the melt and the formation of crystallization and formation a corresponding change in the mechanical properties of castings. Research limitations/implications: The results can be complemented by studies of the effect of thermal treatment in the temperature range of crystallization. Practical implications: The results can be used to select the optimal heat treatment during remelting and, accordingly, the mechanical properties of the resulting casting. Originality/value: The obtained results testify to the predominant influence of temperature on the dispersion of the cast structure of steels, given the duration of technological operations of preparation and casting of steels in the manufacture of castings in industrial conditions.

Słowa kluczowe

EN

steel; aluminium alloy; isothermal treatment; crystallization; heredity of structure; mechanical properties

PL

stal; stop aluminium; obróbka izotermiczna; krystalizacja; dziedziczność struktury; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2020
• Tom: Vol. 104, nr 1
• Strony: 23--29
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Kondratyuk S. Ye.

• Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine, 34/1 Acad. Vernadskoho Ave., Kyiv 03680, Ukraine

autor

Veis V. I.

• Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine, 34/1 Acad. Vernadskoho Ave., Kyiv 03680, Ukraine

autor

Parkhomchuk Z. V.

• Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine, 34/1 Acad. Vernadskoho Ave., Kyiv 03680, Ukraine

Bibliografia

• [1] S.E. Kondratyuk, Structure formation, heredity and properties of cast steel, Naukova Dumka, Kyiv, 2010 (in Ukrainian).
• [2] S.Ye. Kondratyuk, V.I. Veis, Z.V. Parkhomchuk, Structure formation and properties of overheated steel depending on thermokinetic parameters of crystallization, Journal of Achievements in Materials and Manufacturing Engineering 97/2 (2019) 49-56. DOI: https://doi.org/10.5604/01.3001.0013.8537
• [3] Y. Hu, W. Chen, H. Han, R. Bai, Effect of cooling rate after finish rolling on heredity in microstructure and mechanical properties of 60Si2MnA spring steel, Metallurgical Research and Technology 113/5 (2016) 508. DOI: https://doi.org/10.1051/metal/2016024
• [4] V.V. Sanin, M.R. Filonov, V.I. Yukhvid, Yu.A. Anikin, A.M. Mikhailov, Investigation into the influence of the remelting temperature on the structural heredity of alloys fabricated by centrifugal SHS metallurgy, Russian Journal of Non-ferrous Metals 57 (2016) 124-130. DOI: https://doi.org/10.3103/S1067821216020097
• [5] A.A. Bondarev, A.V. Lozovskaya, G.M. Shelenkov, Effect of metallurgical heredity of the AMts alloy semi-finished products on their brazing ability, Automatic Welding 3 (2005) 15-20 (in Russian).
• [6] K. Janerka, D. Bartocha, J. Szajnar, J. Jezierski, The carburizer influence on the crystallization process and the microstructure of synthetic cast iron, Archives of Metallurgy and Materials 55/3 (2010) 851-859.
• [7] K. Janerka, J. Jezierski, D. Bartocha, J. Szajnar, Heredity of the structure and properties of grey cast iron melted on a basis of steel scrap, Advanced Materials Research 622-623 (2013) 685-689. DOI: https://doi.org/10.4028/www.scientific.net/AMR.622- 623.685
• [8] H.I. Aaronson, M. Enomoto, J.K. Lee, Mechanisms of Diffusional Phase Transformations in Metals and Alloys, First Edition, CRC Press, 2016.
• [9] J. Piątkowski, B. Gajdzik, T. Matuła, Crystallization and structure of A390.0 alloy with melt overheating temperature, Metalurgija 51/3 (2012) 321-324.
• [10] J. Piątkowski, Effect of overheating on the mechanical and plastic properties of A390.0 cast alloy, Solid State Phenomena 211 (2014) 9-14. DOI: https://doi.org/10.4028/www.scientific.net/SSP.211.9
• [11] ISO 643:2012 Steels - Micrographic determination of the apparent grain size.
• [12] O.M. Bialik, S.E. Kondratyuk, M.V. Kindrachuk, V.S. Chernenko, Structural analysis of metals. Metallography. Fractography, Polytechnics, Kyiv, 2006 (in Ukrainian).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)