Effect of Boron on the Microstructure and Mechanical Properties of Low-Carbon Tube Steel

Abstract:

Effects of boron in low-carbon tube steel grade 17G1SU on nonmetallic inclusions, structure and mechanical properties were investigated. Experimental samples of rolled metal containing boron 0.006 and 0.011% are characterized by predominantly small, nonmetallic inclusions not more than 5 μm, which are represented by complex alumomagnesium spinels in the shell of manganese and calcium sulfides, and small silicate inclusions. Nonmetallic inclusions of comparative pipe steel sample, containing no boron characterized by the presence of larger inclusions presented complex oxysulfide and sulfide films. The main structural component of the comparative and experimental samples is ferrite. The introduction of boron is contributed by a decrease in the average size of ferritic grains from 8.7 μm (0% B) to 6.2 (0.006% B). Increasing the boron content to 0.011% leads to slight increase (up to 6.8 microns) of the size. The mechanical properties of 10 μm rolled metal pipe steel ensured the production of rolled products of strength class X80 without additional (thermal) treatment, as a result of the reduction in the size and shape of nonmetallic inclusions, and formation of dispersed structure.

• Periodical: Materials Science Forum (Volume 946)
• Pages: 374-379
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.946.374
• Online since: February 2019
• Authors: Anatolij A. Babenko*, Vladimir I. Zhuchkov, Natalia I. Selmenskih
• Keywords: Boron, Low-Carbon Steel, Microstructure, Properties

References

[1] V.A. Uglov, A.N. Zaitsev, The main directions of the development of metallurgical technology to provide modern requirements for the level and stability and service properties of steel, OJSC Chermetinformation". Bulletin "Ferrous Metallurgy,. 3 (2012) 85-93.

[2] E.Kh. Shakhpazov, A.I. Zaytsev, I.G. Rodionov, Modern problems of metallurgy and materials science of steel, Metallurg. 4 (2009) 25-31.

[3] Arabey A.B. Development of technical requirements for the metal pipe of main gas pipelines, Izv. Universities. Ferrous metallurgy. 7 (2010) 3-10.

[4] Ya.E. Goldstein, V.G. Mizin, Inoculation of iron-carbon melts, Metallurgia, Moscow, (1993).

[5] D.A. Dudkin, V.V. Kisilenko, Steel production. Volume 3. Out-of-furnace metallurgy of steel, Teplotehnik, Moscow, (2010).

[6] S.М. Chumakov, A.M. Lamukhin, S.D. Zinchenko, The concept of production of low-sulfur steels at OAO Severstal, taking into account technological aspects, Proceedings of congress steelmaking. (2001) 63-66.

[7] G.A. Sokolov, Out-of-furnace refining of steel, Metallurgy, Moscow, (1977).

[8] Nurhudin, M. Hidagat, W. Basuki, Deep desulfurization process for producing ultra low sulfur steel at PT Krakatau Steel, SEA & S & Quarterly. 33. № 2 (2004) 29-34.

[9] V.L. Pilyushenko, V.A. Vikhleshchuk, The scientific and technological basis of microalloying steel, Metallurgy, Moscow, (2000).

[10] Ya.E. Goldstein, V.G. Mizin, Modification and microcasting of cast iron and steel, Metallurgy, Moscow, (1986).

[11] S.M. Vinorov, Boron, calcium, niobium and zirconium in cast iron and steel, Ed. CM. Vinorova, STITI on ferrous and non-ferrous metallurgy, Moscow, (1961).

[12] M.V. Bobylev, E.G. Queen, A.M. Shtannikov, Prospective economically-alloyed boron-containing steels for the production of high-strength fasteners, Metal Science and Thermal Processing of Metal. 5 (2005) 51-55.

DOI: 10.1007/s11041-005-0053-z

[13] A.B. Sychkov, V.V. Parusov, A.M. Nesterenko, Structure and properties of wire rod from boron-containing steels, intended for the production of welding wire, Metallurgical and mining industry. 3 (2000) 48-51.

[14] G.V. Levchenko, A.I. Yatsenko, N.I. Repin, Testing of the technology of production of thin-sheet low-carbon steel, micro-boron-coated, Metallurgical and mining industry. 1 (2003) 56-59.

[15] N.P. Lyakishev, Yu.L. Pliner, S.I. Lappo, Boron-containing steels and alloys, Metallurgy, Moscow, (1986).

[16] A.A. Babenko, V.I. Zhuchkov, L.N. Leont'ev, Microalloying steel boron - a promising direction to increase the competitiveness of domestic steel products, Tr. N-prak. Conf. Prospects for the development of metallurgy and machine building using the completed fundamental research" R & D ,, Ekaterinburg. (2013) 162-165.

[17] Е.М. Krivko, P.I. Chub, R.P. Konovalov, Microlirovanie boiling steel borom at its restoration from oxides, Pouring steel into molds: Sat.natural.r. MCHM of the USSR, Metallurgy, Moscow, (1984).

[18] A.A. Babenko, V.I. Zhuchkov, L.A. Smirnov, Research and development of a complex technology for the production of low-carbon boron-containing steel with low sulfur content, Steel. 11 (2015) 48-50.

DOI: 10.3103/s0967091215110029

[19] A.A. Babenko, N.I. Selmensky, A.G. Upolovnikova, Investigation of nonmetallic inclusions and the structure of tube steel, microalloyed by boron, Butlerov Communications. 52. №11 (2017) 107-112.

[20] Standard(USA) API Spec 5L. Oil and gas industry -Steel pipes for pipeline transport systems. (2008).