Abstract
Data from a thermodynamic database and the calculation software FactSage were used to investigate the phase diagrams of the MnO-CaO-SiO2-Al2O3 system in cutting-wire steel and the effects of oxide components on the low-melting-point (LMP) zone in the corresponding phase diagrams. Furthermore, the activities of oxide components in the quaternary system at an Al2O3 content of 25wt% were calculated. The contents of dissolved [Al] and [O] in liquid steel in equilibrium with LMP inclusions in the MnO-CaO-SiO2-Al2O3 system were optimized. The results show that the MnO-CaO-SiO2-Al2O3 system possesses the largest LMP zone (below 1400°C) at an Al2O3 content of 25wt% and that the CaO content should be simultaneously controlled in the range of 40wt% to 45wt%. The activities of the oxide components CaO, MnO, and SiO2 should be restricted in the ranges of 0 to 0.05, 0.01 to 0.6, and 0.001 to 0.8, respectively. To obtain LMP inclusions, the [Al] and [O] contents in cutting-wire steel must be controlled within the ranges of 0.5 × 10−6 to 1.0 × 10−5 and 3.0 × 10−6 to 5.0 × 10−5, respectively.
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References
H. Suito and R. Inoue, Thermodynamics on control of inclusions composition in ultra-clean steels, ISIJ Int., 36(1996), No. 5, p. 528.
J.H. Liu, H.J. Wu, Y.P. Bao, and M. Wang, Inclusion variations and calcium treatment optimization in pipeline steel production, Int. J. Miner. Metall. Mater., 18(2011), No. 5, p. 527.
M. Gagné and E. Thibaultt, Control of inclusion characteristics in direct cast steel billets, Can. Metall. Q., 38(1999), No. 5, p. 311.
L.F. Wang, X.J. Zhuo, J.M. Zhang, and X.H. Wang, Controlling inclusion composition in steelmaking process for tire cord steel, J. Univ. Sci. Technol. Beijing, 25(2003), No. 4, p. 308.
K. Kume, K. Morita, T. Miki, and N. Sano, Activity measurement of CaO-SiO2-AlO1.5-MgO slags equilibrated with molten silicon alloys, ISIJ Int., 40(2000), No. 6, p. 561.
H.T. Wang, F.M. Wang, Z.B. Xu, and L.L. Jin, Composition control of CaO-MgO-Al2O3-SiO2 inclusion in tire cord steel: a thermodynamic analysis, Steel Res. Int., 79(2008), No. 1, p. 25.
H.G. Zheng and W.Q. Chen, Formation of CaO·TiO2-MgO·DAl2O3 dual phase inclusion in Ti stabilized stainless steel, J. Univ. Sci. Technol. Beijing, 13(2006), No. 1, p. 16.
Y.B. Kang, H.S. Kim, J. Zhang, and H.G. Lee, Practical application of thermodynamics to inclusions engineer in steel, J. Phys. Chem. Solids, 66(2005), No. 2–4, p. 219.
X.J. Zhuo, Y.Q. Wang, X.H. Wang, and H.G. Lee, Thermodynamic calculation and MnS solubility of Mn-Ti oxide formation in Si-Mn-Ti deoxidized steel, J. Iron Steel Res. Int., 17(2010), No. 2, p. 10.
L.L. Jin, H.T. Wang, Z.B. Xu, and F.M. Wang, Control on low melting point area in a CaO-SiO2-Al2O3-MnO system, J. Univ. Sci. Technol. Beijing, 29(2007), No. 6, p. 574.
Y.B. Kang, I.H. Jung, S.A. Decterov, A.D. Pelton, and H.G. Lee, Critical thermodynamic evaluation and optimization of the CaO-MnO-SiO2 and CaO-MnO-Al2O3 systems, ISIJ Int., 44(2004), No. 6, p. 965.
S.F. Wang and H. Ma, Effect of deformability of CaO-MgO-SiO2-Al2O3 series inclusion on breakage rate of tire cord steel in processing, Spec. Steel, 33(2012), No. 3, p. 32.
X.J. Zhuo, X.H. Wang, W.J. Wang, and H.G. Lee, Thermodynamic calculations and experiments on inclusions to be nucleation sites for intragranular ferrite in Si-Mn-Ti deoxidized steel, J. Univ. Sci. Technol. Beijing, 14(2007), No. 1, p. 14.
C.W. Bale, P. Chartrand, S.A. Degterov, G. Eriksson, K. Hack, R.B. Mahfoud, J. Melançon, A.D. Pelton, and S. Petersen, FactSage thermochemical software and databases, Calphad, 26(2002), No. 2, p. 189.
Y.B. Kang and H.G. Lee, Inclusions chemistry for Mn/Si deoxidized steels: thermodynamic predictions and experimental confirmations, ISIJ Int., 44(2004), No. 6, p. 1006.
G.K. Sigworth and J.F. Elliott, The thermodynamics of liquid dilute iron alloys, Met. Sci., 8(1974), No. 1, p. 298.
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Zhang, J., Wang, Fm. & Li, Cr. Thermodynamic analysis of the compositional control of inclusions in cutting-wire steel. Int J Miner Metall Mater 21, 647–653 (2014). https://doi.org/10.1007/s12613-014-0953-2
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DOI: https://doi.org/10.1007/s12613-014-0953-2