In the current work, the effect of rolling process in a plant and cooling rate during the solidification process under laboratory conditions on the formation of precipitation has been investigated. It has been found that a new homogenous nitride is formed by aluminium and magnesium. The formation of nitrides has been described according to a thermodynamic analysis and the values of Al/Mg mass ratio have ranged from 20 to 58 using a model based on data from automatic scanning electron microscopy. Further, MgO refractories have been identified as the main source of Mg for the formation of aluminium magnesium nitrides. In addition, cooling rate has a significant effect on the number density of nitrides. In order to decrease the number density and obtain a larger particle size, reducing cooling rate during solidification can promote a higher grain size and improve the magnetic properties of non-oriented silicon steels.
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References
1.
WilsonFGGladmanT.Aluminium nitride in steel. Int Mater Rev. 1988;33(1):221–286. doi: 10.1179/imr.1988.33.1.221
2.
SennourMEsnoufC.Contribution of advanced microscopy techniques to nanoprecipitates characterization: case of AlN precipitation in low-carbon steel. Acta Mater. 2003;51:943–957. doi: 10.1016/S1359-6454(02)00498-6
3.
OkenkoAPIvanenkovMIKulkovaMN.Fine precipitates in the grain boundaries of transformer steel. Met Sci Heat Treat. 1971;13(5):376–379. doi: 10.1007/BF00652439
4.
ShiozakiMKurosakiY.The effects of grain size on the magnetic properties of nonoriented electrical steel sheets. J Mater Eng. 1989;11(1):37–43. doi: 10.1007/BF02833752
NakayamaTTanakaT.Effects of titanium on magnetic properties of semi-processed non-oriented electrical steel sheets. J Mater Sci. 1997;32(4):1055–1059. doi:10.1023/A:1018590725223.
7.
NakayamaTTakahashiM.Effects of vanadium on magnetic properties of semi-processed non-oriented electrical steel sheets. J Mater Sci. 1995;30(23):5979–5984. doi:10.1007/BF01151515.
8.
NakayamaTHonjouN.Effect of aluminum and nitrogen on the magnetic properties of non-oriented semi-processed electrical steel sheet. J Magn Magn Mater. 2000;213(1):87–94. doi: 10.1016/S0304-8853(00)00005-6
9.
HouCKHuCTLeeS.The effect of aluminium on the magnetic properties of lamination steels. IEEE Magn. 1991;27(5):4305–4309. doi: 10.1109/20.105054
10.
NakayamaTHonjouNMinagaTet al.Effects of manganese and sulfur contents and slab reheating temperatures on the magnetic properties of non-oriented semi-processed electrical steel sheet. J Magn Magn Mater. 2001;234(1):55–61. doi:10.1016/S0304-8853(01)00208-6.
11.
UeshimaYSawadaYMizoguchiSet al.Precipitation behavior of MnS during transformation in Fe-Si alloys. Metall Mater Trans A. 1988;20(A):1375–1383
12.
LiuZWeiJCaiK.A coupled mathematical model of microsegregation and inclusion precipitation during solidification of silicon steel. ISIJ Int. 2002;42(9):958–963. doi: 10.2355/isijinternational.42.958
13.
LuoYConejoANZhangLet al.Effect of superheat, cooling rate, and refractory composition on the formation of non-metallic inclusions in non-oriented electrical steels. Metall Mater Trans B. 2015;46(5):2348–2360. doi: 10.1007/s11663-015-0401-3
14.
GotoHMiyazawaKIYamaguchiKIet al.Effect of cooling rate on oxide precipitation during solidification of low carbon steels. ISIJ Int. 1994;34(5):414–419. doi: 10.2355/isijinternational.34.414
15.
SchamberF.Introduction to automated particle analysis by focused electron beam. Pittsburgh: Corporation; 2009
16.
FullmanRL.Measurement of particle size in opaque bodies. Trans AIME. 1953;197:447–452.
17.
LuoYLiuYZhangLet al.Analysis of inclusions in non-oriented silicon steel. J Taiyuan Univ Tech. 2014;45(1):34–36.
18.
DiederichsRBleckW.Modelling of manganese sulphide formation during solidification part 1: description of MnS formation parameters. Steel Res Int. 2006;77(3):202–209. doi: 10.1002/srin.200606375
19.
PetrovičDSArhBTehovnikFet al.Erratum to magnesium non-metallic inclusions in non-oriented electrical steel sheets. ISIJ Int. 2011;51(12):2069–2075. doi: 10.2355/isijinternational.51.2069
ZhukovANBurdinaKPSemenenkoKN.Reactions in the AlN–Mg3N2 system at atmospheric and high pressures. Russ J Gen Chem. 1996;66(7):1046–1050.
22.
LehmannJRocaboisPGayeH.Kinetic model of non-metallic inclusions’ precipitation during steel solidification. J Non-Cryst Solids. 2001;282(1):61–71. doi: 10.1016/S0022-3093(01)00329-5
23.
SunHLiuYCLuMJ.Thermodynamic and kinetic analysis of nitrogenization in desulfurization of hot metal by magnesium injection. ISIJ Int. 2009;49(6):771–776. doi: 10.2355/isijinternational.49.771
24.
MitsutakaHKimihisaI.Thermodynamic data for steelmaking. Sendai: Tohoku University Press; 2010.
25.
LiuHLiuJMichelicSet al.Characteristics of AlN inclusions in low carbon Fe–Mn–Si–Al TWIP steel produced by AOD-ESR method. Ironmaking Steelmaking. 2016;43(13):171–179. doi: 10.1179/1743281215Y.0000000028
26.
KimWYJoJOLeeCOet al.Thermodynamic relation between aluminum and titanium in liquid iron. ISIJ Int. 2008;48(1):17–22. doi: 10.2355/isijinternational.48.17
27.
SigworthGKElliottJF.The thermodynamics of liquid dilute iron alloys. Met Sci. 1974;8(1):298–310. doi: 10.1179/msc.1974.8.1.298
28.
ChoSWSuitoH.Assessment of calcium-oxygen equilibrium in liquid iron. ISIJ Int. 1994;34(3):265–269. doi: 10.2355/isijinternational.34.265
29.
ChoudharySKGhoshA.Mathematical model for prediction of composition of inclusions formed during solidification of liquid steel. ISIJ Int. 2009;49(12):1819–1827. doi: 10.2355/isijinternational.49.1819
30.
YongQ.Second phases in structural steels. Beijing: Metallurgical Industry Press; 2006
31.
HillertMJonssonS.An assessment of the AI-Fe-N system. Metall Mater Trans A. 1992;23(A):3141–3149. doi: 10.1007/BF02646133
32.
MerletC.Evaluation and description of a new correction procedure for quantitation electron probe microanalysis. Inst Phys Conf Ser. 1993;130:123–126.
33.
MerletC.An accurate computer correction program for quantitative electron probe microanalysis. Microchim Acta. 1994;114-115(1):363–376. doi: 10.1007/BF01244563
