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Modification of non-metallic inclusions in high-strength steels containing increased Mn and Al contents

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Purpose: The aim of the work is to determine an influence of the effectiveness of the modification of the chemical composition and morphology of non-metallic inclusions by rare earth elements in advanced high strength steels (AHSS) with increased Mn and Al contents. Design/methodology/approach: The effects of the modification of non-metallic inclusions were assessed in four thermomechanically rolled AHSS containing various Mn (3 and 5%) and Nb (0 and ~ 0.04%) concentration. The surface fraction, surface area and aspect ratio were determined at longitudinal sections of the sheets with a thickness of 3.3 mm. The chemical composition of particles was investigated using point analysis and mapping by means of EDS and WDS techniques. Findings: The refining treatment of a liquid steel has an important effect on the sulphur content in a steel, a surface fraction of non-metallic inclusions, their deformability during hot-rolling and morphology. On the other hand the addition of mischmetal does not affect an inclusion size. The chemical composition of particles is independent on the Mn content in a range investigated, i.e., from 3 to 5%. The steels with the addition of REE contain totally modified, fine oxysulfides of Ce, La and Nd whereas the steel not subjected to the refining treatment contains elongated MnS, complex MnS + AlN compounds and AlN particles decorated in the outside zone by MnS and Al<sub>2</sub>O<sub.3</sub>. Practical implications: The knowledge of the stereological parameters of non-metallic inclusions and their morphology are of primary importance for the steelmaking and hot-working technologies of steel products. Originality/value: An effectiveness of the modification of the chemical composition and morphology of non-metallic inclusions by REE in advanced high-strength steels with increased Mn and Al contents is addressed in the current study.
Rocznik
Strony
245--255
Opis fizyczny
Bibliogr. 35 poz., rys., tab.
Twórcy
autor
  • Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland, adam.grajcar@polsl.pl
autor
  • Institute of Non-Ferrous Metals, ul. Sowińskiego 5, 44-100 Gliwice, Poland
autor
  • Institute for Ferrous Metallurgy, ul. K. Miarki 12-14, 44-100 Gliwice, Poland
autor
  • Institute for Ferrous Metallurgy, ul. K. Miarki 12-14, 44-100 Gliwice, Poland
autor
  • Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland
  • Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland
Bibliografia
  • [1] A. Pichler, S. Traint, T. Hebesberger, P. Stiaszny, E.A. Werner, Processing of thin multiphase steel grades, Steel Research International 78 (2007) 216-223.
  • [2] J. Adamczyk, A. Grajcar, Heat treatment and mechanical properties of low-carbon steel with dual-phase microstructure, Journal of Achievements in Materials and Manufacturing Engineering 22/1 (2007) 13-20.
  • [3] B. Gajda, A.K. Lis, A study of microstructure and phase transformations of CMnAlSi TRIP steel, Journal of Achievements in Materials and Manufacturing Engineering 31/2 (2008) 646-653.
  • [4] D. Krizan, B.C. De Cooman, Analysis of the strain-induced martensitic transformation of retained austenite in cold rolled micro-alloyed TRIP steel, Steel Research International 79/7 (2008) 513-522.
  • [5] A. Grajcar, Structural and mechanical behaviour of TRIP steel in hot-working conditions, Journal of Achievements in Materials and Manufacturing Engineering 30 (2008) 27-34.
  • [6] M. Mukherjee, S.B. Singh, O.N. Mohanty, Microstructural characterization of TRIP-aided steels, Materials Science and Engineering A 486 (2008) 32-37.
  • [7] O. Muransky, P. Hornak, P. Lukas, J. Zrnik, P. Sittner, Investigation of retained austenite stability in Mn-Si TRIP steel in tensile deformation condition, Journal of Achievements in Materials and Manufacturing Engineering 14 (2006) 26-30.
  • [8] A. Grajcar, Effect of hot-working in the y+a range on a retained austenite fraction in TRIP-aided steel, Journal of Achievements in Materials and Manufacturing Engineering 22/2 (2007) 79-82.
  • [9] H. Yu, S. Li, Y. Gao, Deformation behavior of the constituent phases for cold-rolled TRIP-assisted steels during uniaxial tension, Materials Characterization 57 (2006) 160-165.
  • [10] A. Grajcar, R. Kuziak, Softening kinetics in Nb-microalloyed TRIP steels with increased Mn content, Advanced Materials Research 314-316 (2011) 119-122.
  • [11] P.J. Gibbs, E. De Moor, M.J. Merwin, B. Clausen, J.G. Speer, D.K. Matlock, Austenite stability effects on tensile behaviour of manganese-enriched-austenite transformation-induced plasticity steel, Metallurgical and Materials Transactions A 42A (2011) 3691-3702.
  • [12] A. Grajcar, E. Kalinowska-Ozgowicz, M. Opiela, B. Grzegorczyk, K. Gołombek, Effects of Mn and Nb on the macro- and microsegregation in high-Mn high-Al content TRIP steels, Archives of Materials Science and Engineering 49/1 (2011) 5-14.
  • [13] G.A. Thomas, J.G. Speer, D.K. Matlock, Quenched and partitioned microstructures produced via Gleeble simulations of hot-strip mill cooling practices, Metallurgical and Materials Transactions A 42A (2011) 3652-3659.
  • [14] A. Grajcar, R. Kuziak, Effects of Nb microaddition and thermomechanical treatment conditions on hot deformation behaviour and microstructure of Mn-Al TRIP steels, Advanced Science Letters 15 (2012) 332-336.
  • [15] P.S. Bandyopadhyay, S.K. Ghosh, S. Kundu, S. Chatterjee, Evolution of microstructure and mechanical properties of thermomechanically processed ultrahigh-strength steel, Metallurgical and Materials Transactions A 42A (2011) 2742-2752.
  • [16] A. Grajcar, Determination of the stability of retained austenite in TRIP-aided bainitic steel, Journal of Achievements in Materials and Manufacturing Engineering 20/1-2 (2007) 111-114.
  • [17] K. Sugimoto, K. Nakano, S.M. Song, T. Kashima, Retained austenite characteristics and stretch-flangeability of high-strength low-alloy TRIP type bainitic sheet steels, ISIJ International 42/4 (2002) 450-455.
  • [18] J. Adamczyk, A. Grajcar, Heat treatment of TRIP-aided bainitic steel, International Journal of Microstructure and Materials Properties 2 (2007) 112-123.
  • [19] A.K. Lis, J. Lis, L. Jeziorski, Advanced ultra-low carbon bainitic steels with high toughness, Journal of Materials Processing Technology 64 (1997) 255-266.
  • [20] A. Grajcar, R. Kuziak, W. Zalecki, Third generation of AHSS with increased fraction of retained austenite for the automotive industry, Archives of Civil and Mechanical Engineering 12 (2012) 334-341.
  • [21] L.A. Dobrzański, A. Grajcar, W. Borek, Microstructure evolution of high-manganese steel during the thermomechanical processing, Archives of Materials Science and Engineering 37/2 (2009) 69-76.
  • [22] A. Grajcar, S. Kołodziej, W. Krukiewicz, Corrosion resistance of high-manganese austenitic steels, Archives of Materials Science and Engineering 41/2 (2010) 77-84.
  • [23] T. Bator, Z. Muskalski, S. Wiewiórowska, J.W. Pilarczyk, Influence of the heat treatment on the mechanical properties and structure of TWIP steel in wires, Archives of Materials Science and Engineering 28/6 (2007) 337-340.
  • [24] L.A. Dobrzański, W. Borek, Hot deformation and recrystallization of advanced high-manganese austenitic TWIP steels, Journal of Achievements in Materials and Manufacturing Engineering 46/1 (2011) 71-78.
  • [25] L.A. Dobrzański, W. Borek, M. Ondrula, Thermomechanical processing and microstructure evolution of high-manganese austenitic TRIP-type steels, Journal of Achievements in Materials and Manufacturing Engineering 53/2 (2012) 59-66.
  • [26] E. De Moor, D.K. Matlock, J.G. Speer, M.J. Merwin, Austenite stabilization through manganese enrichment, Scripta Materialia 64 (2011) 185-188.
  • [27] A. Grajcar, U. Galisz, L. Bulkowski, Non-metallic inclusions in high manganese austenitic alloys, Archives of Materials Science and Engineering 50/1 (2011) 21-30.
  • [28] G. Lacroix, T. Pardoen, P.J. Jacques, The fracture toughness of TRIP-assisted multiphase steels, Acta Materialia 56/15 (2008) 3900-3913.
  • [29] P. Kaushik, H. Yin, Thermodynamics, engineering and characterization of inclusions in advanced high-strength steels, Iron and Steel Technology 9/12 (2012) 165-185.
  • [30] G. Gigacher, W. Krieger, P.R. Scheller, C. Thomser, Non-metallic inclusions in high-manganese-alloy steels, Steel Research International 76/9 (2005) 644-649.
  • [31] S. Yang, L. Zhang, L. Sun, J. Li, K.D. Peaslee, Investigation on MgO'Al2O3-based inclusions in steels, Iron and Steel Technology 9/8 (2012) 245-258.
  • [32] M. Opiela, M. Kamińska, Influence of the rare-earth elements on the morphology of non-metallic inclusions in microalloyed steels, Journal of Achievements in Materials and Manufacturing Engineering 47/2 (2011) 149-156.
  • [33] C. Luo, U. Stahlberg, Deformation of inclusions during hot rolling of steels, Journal of Materials Processing Technology 114 (2001) 87-97.
  • [34] K. Bolanowski, Influence of rare-earth elements on the structure and properties of steel, Metallurgical News 7-8 (2004) 323-325 (in Polish).
  • [35] M. Opiela, A. Grajcar, Modification of non-metallic inclusions by rare-earth elements in microalloyed steels, Archives of Foundry Engineering 12/2 (2012) 129-134.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-b2bf0de4-7dbc-4e20-8c42-8277cea06acc
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