Analysis of Internal Defects Appeared in the Continuous Casting

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The paper presents the study of internal defects resulting from the continuous casting of steels. The 50 samples were taken from a total of 20 continuously cast bits of different steel grades. The investigation of the causes of internal defects, shown on the analyzed samples, started from the assumption that the secondary metallurgy was performed correctly. The following internal defects have been evident: internal cracks (axial cracks, section cracks), central porosity and marginal punctuation impurities.

[1] O. Florea s.a., Teoria Proceselor Metalurgice, Ediţia a-2-a, Editura Didactică şi Pedagogică Bucureşti, 1984.

[2] C.O. Rusănescu, M. Rusănescu, F.V. Anghelina, V Bratu, The influence of the micro-alloying elements on physical and structural characteristics of the some steel destined for manufacturing the oil pipes, Romanian Reports in Physics, Vol.68,no.1, 278-293, 2016

[3] J. H. Chesters, Refractories for iron & steelmaking, The Metals Society, London 1974, pp. 406-407.

[4] V. Bratu, Metode experimentale şi procedee privind îmbunătăţirea calităţii semifabricatelor turnate continuu, Editura Ştiinţifică F.M.R., Bucureşti, 2003.

[5] C.O. Rusănescu, M.Rusănescu, Traian Iordanescu, V. Anghelina, Mathematical relation ships between alloying elements and technological deformability indexes, Journal of optoelectronics and advanced materials, Vol.15, No.7- 8, 718-723, 2013.

[6] E. Popa, T. Heput, E. Ardelean, A. Socalici, Identifying the main defects appeared in the structure of continuous blanks, International journal of systems applications, engineering & development Issue 1, Volume 6, 2012.

[7] N. Oargă, T. Heput, E. Ardelean, E. Popa, Study on internal defects continuously cast blanks, Annals of Faculty of Engineering from Hunedoara, tom III, fasc.1, 2001.

[8] E. Ardelean, M. Ardelean, A. Socalici, T. Heput, Simulation of continuous cast steel product solidification,Rev. Metal.Madrid 43, 181- 187, 2007.

[9] V. Bratu, I.N. Popescu, The Mathematical Model Applied to Solidify and Segregation of Ledeburite Tool Steel Ingots, Scientific Bulletin of Valahia University-Materials and Mechanics 15 (12), 28-31, 2017.

[10] V.Vrabie, C.Bratu, I.Chira, Tehnologia Elaborării şi Turnării Oţelului, Editura Didactică şi Pedagogică Bucureşti, 1979.

[11] S.Mckay, N.S. Hunter, A.S. Normanton, V.Ludlow, P.N. Hewitt, B.Harris, Powder evaluation for continuous casting , Ironmaking and Steelmaking 2002, vol. 29, Nr. 3, p. 189.

[12] K. Kim, H. N. Han, T. Yeo, Y. Lee, K. H. Oh, D. N. Lee, Analysis of surface and internal cracks in continuously cast beam blank, Ironmaking and Steelmaking 1991 Vol. 24 NO. 3 p.249

[13] Y. Tanizawa, Factors of decarburation in continuous casting of ulc steels and the remedies. Camp Isij, vol. 4, 1991, p. 257.

[14] Ghe. Ioniţă, E.V.Stoian, Heat flow in solidification, Buletinul Universităţii Petrol-Gaze din Ploieşti,ISSN 1224-8495, 87-92, 2006.

[15] K.Koyama, Y.Nagano, K.Nagano, T.Nagano, Physicochemical properties of powders used for continuous casting, N.S.T.R. nr. 34, July 1987.

[16] Yu, X., Pomfret, R. J., Coley, K. S. Dissolving alumina in the crystalliser powder , Metallurgical and Materials Transaction B , vol. 28, 1997.

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