Cleanness and Mechanical Properties of Steel after Remelting under Different Slags by ESR

Abstract:

Quality of machine production is very close-knit with quality of metallurgical semi-products and with improvement their working properties. It can be achieved first of all by decrease of sulphur and non-metallic inclusions content in metal. Improvement of working properties provide remelted processes above an electro slag remelting (ESR). The slags play very important role by ESR process. By experiments steel with next chemical composition was used: C (0,9 – 1,1%), Mn (0,30 – 0,50%), Si (0,15 – 0,35%), Cr (1,30 – 1,65%), Ni (max.0,30%), Cu (max.0,25%), P (max.0,027%), S (max.0,030%). The steel was remelted under 8 types of slags on the base of CaO, Al₂O₃, CaF₂ and SiO₂ in different ratios. The contribution deals with influence of chemical composition of slag on mechanical properties and cleannes of metal after electro slag remelting. Variation of slag chemical composition enables to change chemical composition of remelted steel, to reduce the non-metallic inclusions and sulphur content and to improve the mechanical properties of steel.

• Periodical: Key Engineering Materials (Volume 635)
• Pages: 112-117
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.635.112
• Online since: December 2014
• Authors: Alena Pribulová*, Peter Futáš, Marianna Bartošová
• Keywords: Electroslag Remelting, Mechanical Property, Non-Metallic Inclusions, Slag, Sulphur

References

[1] B.J. Paton, B.I. Medovar, Problemy elektrošlakovoj technologiji, first ed., Naukova Dumka, Kijev, (1978).

[2] B.J. Paton, B.I. Medovar, Elektrošlakovoje litje, first ed. Naukova Dumka, Kijev, (1980).

[3] A.K. Vaish, G.V. Iyer, P.K. De, B.A. Lakra, A.K. Chakrabarti and P. Ramachandrarao, Electroslag remelting – Its status, mechanism and refining aspects in the production of quality steels, Journal of Metallurgy and Materials Science, 42 (2000) 11-29.

[4] A.D. Helmes, C.M. O´Brien, Advances in melting technology for high-temperature alloys, Journal of Metals, 50 (1998) 12.

[5] G. Hoyle, Electroslag Processes, Principles and Practice, first ed., Appliead Science Publishers, London and New York, (1983).

[6] W.E. Duckworth and G., Hoyle, Electro-slag Refining, first ed., Chapman and Hall Ltd., London, (1969).

[7] H. Eversion, Steel technology developments boost aerospace application, Metallurgia, 59 (2002) 233 - 234.

[8] T.R. Bandyopadhyay, P.K. Rao, N. Prabhu, Behavior of alloying elements during electro-slag remelting of ultrahigh strength steel, Metallurgical and Mining Industry, 4 (2012) 6 – 16.

[9] S. Ahmadi, H. Arabi, A. Shokuhfar and A. Rezaei, Evaluation of the electroslag remelting process in medical grade of 316LC stainless steel, J.Mater.Sci. Technol.,25 (2009) 592 - 596.

[10] R.H. Nafziger and others, The electroslag melting process, first ed., U.S. Bureau of Mines, Washington, (1976).

[11] M.M. Kljujev, S.E. Volkov, Elektrošlakovyj pereplav, first ed., Metallurgija, Moskva, (1984).