Complex bimetallic inclusions formed in billets from steels 09G2S and K52 during heating for rolling are studied by methods of electron microscopy and local x-ray spectrum analysis. To check the established evolution of oxide inclusions based on aluminomagnesium spinel and other oxide compositions, individual inclusions of manganese sulfide and complex oxide-sulfide inclusions, a method developed by the Severstal’Company and the Karpov NIFKhI for determining the content of corrosion-active nonmetallic inclusions (CANI) as a function of the heating mode is applied to the steels studied. It is recommended to increase the temperature and duration of heating of billets for hot rolling in order to lower the content of CANI and to raise the resistance of the steels to local corrosion.
Similar content being viewed by others
References
A. I. Zaitsev, V. S. Kraposhin, I. G. Rodionova, et al., Complex Nonmetallic Inclusions and Properties of Steel [in Russian], Metallurgizdat, Moscow (2015), 276 p.
A. I. Zaitsev, I. G. Rodionova, G. V. Semernin, et al., “New types of unfavorable nonmetallic inclusions based on MgO – Al2O3 and metallurgical factors determining their content in metal. Pt. 1,” Metallurg, No. 2, 50 – 55 (2011).
I. G. Rodionova, A. I. Zaitsev, O. N. Baklanova, et al., Recent Approaches to Elevation of Corrosion Resistance and Operational Reliability of Steels for Oil Field Pipelines [in Russian], Metallurgizdat, Moscow (2012), 172 p.
A. I. Zaitsev, I. G. Rodionova, A. A. Pavlov, et al., “Effect of the composition, structural state and production process on the operating properties of the high-strength low-carbon steel of the base layer of a bimetal,” Metallurg, No. 8, 50 – 58 (2015).
N. L. Abramycheva, I. V. V’yimitskii, K. B. Kalmykov, and S. F. Dunaev, “Isothermal cross-section of the phase diagram of the Fe – Ni – Ti system at 1273 K,” Vestn. Mosk. Univ., Ser. 2, Khimiya, 40(2), 139 – 143 (1999).
N. G. Shaposhnikov, B. M. Mogutnov, S. M. Polonskaya, et al., “Thermodynamic simulation as a tool for advancing the process of heating of ingots from steel 12Kh18N10T for rolling,” Materialovedenie, No. 11, 2 – 9 (2004).
I. I. Reformatskaya, A. N. Podobaev, G. M. Florianovich, et al., A Method for Controlling the Quality of Steel Articles (Its Variants), RF Patent 2149400, G01N33/20, G01N17/00, No. 99101963/28 [in Russian], Appl. 03.02.1999, Publ. 20.05.2000, 3 p.
A. I. Zaitsev, A. V. Koldaev, A. V. Amezhnov, et al., “A study of the laws of evolution of nonmetallic inclusions (precipitates) under heating of billets for rolling with the aim to raise the set of properties and the quality characteristics of structural steels,” Metallurg, No. 7, 51 – 57 (2016).
A. I. Zaitsev, I. G. Rodionova, O. N. Baklanova, et al., “A study of the effect of metallurgical factors on the resistance of modern pipe steels to corrosion cracking,” Probl. Chern. Metall. Materialoved., No. 1, 54 – 69 (2013).
A. I. Zaitsev, I. G. Rodionova, N. G. Shaposhnikov, et al., “Development of scientific foundations of effective processes of production of cold-rolled high-strength low-alloy steels by controlling the type, content and morphology of precipitates of nonmetallic excess phases,” Probl. Chern. Metall. Materialoved., No. 1, 75 – 85 (2012).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 3 – 9, December, 2016.
Rights and permissions
About this article
Cite this article
Zaitsev, A.I., Koldaev, A.V., Arutyunyan, N.A. et al. Complex Nonmetallic Inclusions Formed in Billets Heated for Rolling and Characteristics of Structural Steels. Met Sci Heat Treat 58, 697–703 (2017). https://doi.org/10.1007/s11041-017-0080-6
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11041-017-0080-6