Effects of warm temper rolling on microstructure, texture and magnetic properties of strip-casting 6.5wt% Si electrical steel

Li, Haoze; Liu, Haitao; Liu, Yi; Liu, Zhenyu; Cao, Guangming; Luo, Zhonghan; Zhang, Fengquan; Chen, Shenglin; Lyu, Li; Wang, Guodong

doi:10.1016/j.jmmm.2014.06.053

Cited by 58 publications

(3 citation statements)

References 23 publications

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“…Subgrain growth driven by dislocations near high-angle grain boundaries is a typical recrystallisation behaviour for deformed microstructures with many internal substructures and high stored energy, such as shear bands within {111} grains [35,36]. For deformed microstructure with few internal substructures and low stored energy (such as {100} and α-oriented deformation bands), the strain-induced boundary migration (SIBM) will dominate the recrystallisation process [37,38], which is driven by the difference in stored energy between adjacent grains. Grain boundaries of new grains formed by SIBM would have fast migration rate.…”

Section: Recrystallisation Behaviour During Annealing Processmentioning

confidence: 99%

Effect of pre-recovery annealing on recrystallisation behaviour of strip-cast non-oriented electrical steel

Jiao

Xie

et al. 2023

Materials Science and Technology

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In order to improve the {100} recrystallisation texture of non-oriented electrical steel, a pre-recovery annealing process was proposed to regulate recrystallisation behaviour of {100} grains by altering the structure and stored energy of deformed microstructure. Pre-annealing was conducted at 500°C for 0–90 min. The microstructural and textural evolution was carried out by optical microscopy, electron backscattered diffraction and X-ray diffraction analysis. The results indicate that the pre-recovery annealing promotes the formation of large {100} recrystallised grains. With the prolongation of pre-annealing time, the {100} recrystallisation texture expands from Cube to the vicinity of {001}<130>-{001}<110>, and the volume fraction gradually increases. In addition, the changes of recrystallised microstructure are discussed on the basis of strain-induced boundary migration.

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Section: Recrystallisation Behaviour During Annealing Processmentioning

confidence: 99%

Effect of pre-recovery annealing on recrystallisation behaviour of strip-cast non-oriented electrical steel

Jiao

Xie

et al. 2023

Materials Science and Technology

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“…Due to the limited formability and ductility of the material, it is di cult to roll it into thin sheets using conventional rolling methods. The low-cost batch preparation of Fe-6.5wt.%Si alloy sheet cannot be realized under the existing production conditions of the steel mill, which seriously limits its large-scale application and thus affects its wide application [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Fe-6.5wt.%Si alloys prepared by different cooling methods on ordered structure and mechanical properties

Xuan

Zhang

Zhou

et al. 2022

Int J Adv Manuf Technol

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The non-oriented Fe-6.5wt.%Si alloy cast strip with a width of 100 mm and a thickness of 1.7 mm was prepared by the top side-pouring twin-roll casting (TSTRC) process. The surface quality of the air-cooled and water-cooled cast strip was good. Compared with the Fe-6.5wt.%Si alloy ingot, the Fe-6.5wt.%Si alloy cast strip has a relatively ne solidi cation structure and exhibits certain plasticity at room temperature.Microhardness, XRD, and TEM investigated the ordered structure and degree of Fe-6.5wt.%Si alloys prepared by three different cooling methods. The results show that the Fe-6.5wt.%Si alloy ingot prepared by the standard method has many B 2 ordered phases and DO 3 ordered phases, and the order degree is high. The Fe-6.5wt.%Si alloy cast strip prepared by the TSTRC process has a low degree of order and only contains a small B 2 ordered phase. The faster cooling rate effectively inhibits the formation of the DO 3 ordered phase and B 2 ordered phase. The growth of the ordered phase also reduces the reverse domain boundary energy, reduces the motion resistance of superdislocations, and increases its mobility, thereby improving the room temperature plasticity of Fe-6.5wt.%Si alloy cast strips.

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“…Conventional processing (hot rolling followed by annealing then cold rolling and annealing) involves several recrystallisation steps. Many recent papers have investigated how to process high silicon steel using warm rolling [10,11] to minimise cracking due to its inherent brittle nature, where recovery also occurs. In addition, some more novel methods such as skew rolling [12], skin passes [13] and asymmetric rolling [14] are not only showing promise in being suitable for processing this material, but under certain processing conditions then a higher fraction of favourable {100} texture can be retained.…”

Section: Introductionmentioning

confidence: 99%

Control of as-cast microstructure morphology of high silicon electrical steels produced through a horizontal belt casting process simulator

Slater

Bandi

et al. 2020

Ironmaking & Steelmaking

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Increase in global electrification is driving the development of new electrical steels with improved performance, such as Fe-6Si suitable for high-frequency e-machines. Fe-6Si steel is difficult to cast and roll such that currently, the only commercial production is via downstream siliconisation to increase Si content. This paper explores the feasibility of casting ultra-high silicon electrical steels through a belt cast simulator and how the microstructure depends on casting parameters. Changes in the superheat, belt profile, belt coating and cast thickness have been considered and shows that microstructures from large columnar grains with a highly favourable {100} texture, to fine equiaxed random texture grains can be produced. It is also shown that casting to thicknesses of around 3.5 mm can be achieved such that a minimal amount of deformation is needed to produce the final product (around 0.1 mm thick), which will reduce the likelihood of cracking during rolling.

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Effects of warm temper rolling on microstructure, texture and magnetic properties of strip-casting 6.5wt% Si electrical steel

Cited by 58 publications

References 23 publications

Effect of pre-recovery annealing on recrystallisation behaviour of strip-cast non-oriented electrical steel

Effect of pre-recovery annealing on recrystallisation behaviour of strip-cast non-oriented electrical steel

Effects of Fe-6.5wt.%Si alloys prepared by different cooling methods on ordered structure and mechanical properties

Control of as-cast microstructure morphology of high silicon electrical steels produced through a horizontal belt casting process simulator

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