EFFECTS OF RECRYSTALLIZATION ON THE MICROSTRUCTURE, ORDERING AND MECHANICALPROPERTIES OF COLD-ROLLED HIGH SILICON ELECTRICAL STEEL SHEET

doi:10.11900/0412.1961.2015.00661

Acta Metall Sin

2016, Vol. 52

Issue (11): 1363-1371 DOI: 10.11900/0412.1961.2015.00661

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EFFECTS OF RECRYSTALLIZATION ON THE MICROSTRUCTURE, ORDERING AND MECHANICALPROPERTIES OF COLD-ROLLED HIGH SILICON ELECTRICAL STEEL SHEET

Yuanke MO,Zhihao ZHANG(

),Jianxin XIE,Hongjiang PAN

Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

Cite this article:

Yuanke MO,Zhihao ZHANG,Jianxin XIE,Hongjiang PAN. EFFECTS OF RECRYSTALLIZATION ON THE MICROSTRUCTURE, ORDERING AND MECHANICALPROPERTIES OF COLD-ROLLED HIGH SILICON ELECTRICAL STEEL SHEET. Acta Metall Sin, 2016, 52(11): 1363-1371.

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Abstract

High silicon electrical steel (Fe-6.5%Si alloy, mass fraction) has excellent soft magnetic properties. However, the alloy is very brittle at room temperature and quite hard to be fabricated into cold-rolled sheet by conventional rolling process due to the existence of ordered phases. In recent years, high silicon electrical steel sheet has been successfully obtained though rolling process, and many studies have focused on the recrystallization of the alloy sheet in order to optimize the magnetic properties. Furthermore, it is necessary to further investigate the plasticity of recrystallized high silicon electrical steel sheet for improving the subsequent plastic deformation, such as coiling, uncoiling, blanking and secondary cold-rolling. In this study, effects of recrystallization on the microstructure, ordering, mechanical properties and cold-rolling workability of cold-rolled high silicon electrical steel samples were investigated by using SEM, TEM, EBSD, bending test, tensile test and cold-rolling. The results show that when the cold-rolled samples were recrystallized at 800~1200 ℃ for 1 h followed by furnace-cooling, the plasticity of the sample is sharply decreased, which is proved by the decrease of bending angles from about 150° to 50° and the occurrence of serious edge cracks after secondary cold-rolling. The plasticity of the recrystallized sample is significantly improved by increasing both the cooling temperature and cooling rate during the recrystallization. When the cold-rolled samples were recrystallized at 1000 ℃ for 1 h followed by oil-quenching from 900 ℃, the bending angles are increased to about 175°, the average elongation to failure are increased from 0.2% of furnace-cooling sample to 5.2%, and the secondary cold-rolling edge cracks are suppressed effectively. The plasticity improvement can be attributed to the refinement of ordered domain during recrystallization annealing with high cooling temperature and high cooling rate. For instance, the size of ordered domain in the sample by oil-quenching at 600 ℃ or below is about 5 μm, while the sizes in the samples by oil-quenching from 700 ℃ and 900 ℃ are reduced to less than 50 nm and 25 nm, respectively.

Key words: high silicon electrical steel, cold-rolling, recrystallization annealing, ordering, mechanical property

Received: 29 December 2015

Fund: Supported by National Basic Research Program of China (No.2011CB606300) and National High Technology Research and Development Program of China (No.2012AA03A505)

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	Yuanke MO
	Zhihao ZHANG
	Jianxin XIE
	Hongjiang PAN

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https://www.ams.org.cn/EN/10.11900/0412.1961.2015.00661 OR https://www.ams.org.cn/EN/Y2016/V52/I11/1363

Fig.1 Schematic of bending test (l₀—original length of the sample, l—distance between the both ends of the sample when cracks start to appear, α—bending angle)

Fig.2 Bended macrostructures of cold-rolled high silicon electrical steel (a, b) and the samples recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (c)

Fig.3 Low (a, c) and locally high (b, d) magnified SEM images of tensile fracture in cold-rolled sample (a, b) and recrystallized sample at 1000 ℃ for 1 h followed by furnace-cooling (c, d)

Fig.4 TEM image of dislocation configuration (a) and [001] SAED patterns of cold-rolled sample (b), and the sample recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (c) (The spots connected by lines in Fig.4b represent a set of matrix spots)

Fig.5 Effect of cooling condition of recrystallization on the bending properties of the high silicon electrical steel samples (Insets show the macrostructures of representative bended samples)

Fig.6 Macrostructures (a, b) and OM images (c, d) of the samples recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (a, c) and oil-quenching from 900 ℃ (b, d)

Fig.7 Macrostructures of secondary cold-rolling of the samples recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (a) and oil-quenching from 900 ℃ (b) (Rolling by 1 pass with a reduction of about 16% and 27%)

Fig.8 EBSD images along normal direction (ND) (a, c) and rolling direction (RD) (b, d) of the samples recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (a, b) and oil-quenching from 900 ℃ (c, d) (The blue, purple and red grains represent {111}, {112} and {100} orientations respectively in Figs.8a and c. The green, red and purple grains represent <011>, <100> and <112> orientations respectively in Figs.8b and d)

Fig.9 TEM images show the ordered domains of the samples recrystallized at 1000 ℃ for 1 h followed by furnace-cooling (a) and oil-quenching from 600 ℃ (b), 700 ℃ (c) and 900 ℃ (d)

[1]	Park J T, Szpunar J A.Acta Mater, 2003; 51: 3037
[2]	Lee K M, Park S Y, Huh M Y, Kim J S, Engler O. J Magn Magn Mater, 2014; 354: 324
[3]	Komatsubara M, Sadahiro K, Kondo O, Takamiya T, Honda A. J Magn Magn Mater#/magtechI#, 2002; 242-245: 212
[4]	Oda Y, Kohno M, Honda A.J Magn Magn Mater, 2008; 320: 2430
[5]	Ros-Yá?ez T, Houbaert Y, Fischer O, Schneider J.J Mater Process Technol, 2003; 141: 132
[6]	Liang Y F, Ye F, Lin J P, Wang Y L, Chen G L.J Alloys Compd, 2010; 491: 268
[7]	Fang X S, Liang Y F, Ye F, Lin J P.J Appl Phys, 2012; 111: 94913
[8]	Qin J, Yang P, Mao W M, Ye F.J Magn Magn Mater, 2015; 393: 537
[9]	Liu H T, Liu Z Y, Sun Y, Gao F, Wang G D.Mater Lett, 2013; 91: 150
[10]	Li H Z, Liu H T, Liu Y, Liu Z Y, Cao G M, Luo Z H, Zhang F Q, Chen S L, Lyu L, Wang G D.J Magn Magn Mater, 2014; 370: 6
[11]	Li H Z, Liu H T, Liu Z Y, Wang G D.Mater Charact, 2015; 103: 101
[12]	Fu H D, Zhang Z H, Pan H J, Mo Y K, Xie J X.Int J Min Met Mater, 2013; 20: 535
[13]	Mo Y K, Zhang Z H, Xie J X, Fu H D, Pan H J.Int J Min Met Mater, 2015; 22: 1171
[14]	Pan H J, Zhang Z H, Xie J X.J Magn Magn Mater, 2016; 401C: 625
[15]	Stojakovic D, Doherty R D, Kalidindi S R, Landgraf F J G.Metall Mater Trans, 2008; 39A: 1738
[16]	Wang Y, Xu Y B, Zhang Y X, Fang F, Lu X, Liu H T, Wang G D.J Magn Magn Mater, 2015; 379: 161
[17]	Viala B, Degauque J, Fagot M, Baricco M, Ferrara E, Fiorillo F.Mater Sci Eng, 1996; A212: 62
[18]	Shin J S, Lee Z H, Lee T D, Lavernia E J.Scr Mater, 2001; 45: 725
[19]	Zhang Z H, Wang W P, Fu H D, Xie J X.Mater Sci Eng, 2011; A530: 519
[20]	Li H, Liang Y F, He R Q, Lin J P, Ye F.Acta Metall Sin, 2013; 49: 1452
[20]	(李慧, 梁永锋, 贺睿琦, 林均品, 叶丰. 金属学报, 2013; 49: 1452)
[21]	Mo Y K, Zhang Z H, Pan H J, Xie J X.J Mater Sci Technol, 2016; 32: 477
[22]	Raviprasad K, Chattopadhyay K.Acta Metall Mater, 1993; 41: 609
[23]	Shin J S, Bae J S, Kim H J, Lee H M, Lee T D, Lavernia E J, Lee Z H.Mater Sci Eng, 2005; A407: 282
[24]	Jung H, Kim J. J Magn Magn Mater, 2014; 353: 76
[25]	Fu H D, Zhang Z H, Yang Q, Xie J X.Mater Sci Eng, 2011; A528: 1391
[26]	Mo Y K, Zhang Z H, Fu H D, Pan H J, Xie J X.Mater Sci Eng, 2014; A594: 111
[27]	Li H, Liang Y F, Yang W, Ye F, Lin J P, Xie J X. Mater Sci Eng, 2015; A628: 262
[28]	Matsumura S, Tanaka Y, Koga Y, Oki K.Mater Sci Eng, 2001; A312: 284

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