Effect of hot band annealing on inclusions, texture, and magnetic properties of 2.97%Si-0.59% Al non-oriented silicon steel

Qiao, Jiao long; Liu, Lei; Guo, Fei; Li, Xiang; Qiu, Sheng Tao; Wang, Hai-jun

doi:10.1080/03019233.2018.1553263

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…[ 16 ] The size of MnS obviously increased after normalized annealing. [ 17 ] Precipitates retained in the cold‐rolled sheet preferentially became the origin of the oxidation point to form dark spots, as also shown in Fang's work. [ 18 ] More appeared in the samples normalized above 1000 °C.…”

Section: Resultsmentioning

confidence: 60%

Comprehensive Influence of the Normalized and Final Annealing Process on High‐Strength Nonoriented Silicon Steel

Song

Wang

et al. 2022

steel research int.

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High-strength nonoriented silicon steel is widely used to make automobile engines. On the basis of ensuring certain magnetic properties, it also needs higher mechanical properties. The matching of magnetic and mechanical properties can be achieved by comprehensive control of normalized and final annealing. Different annealing temperatures and times are applied to clarify the change of texture, thus influencing magnetic induction, iron loss, and mechanical properties. Route B obtains the optimal normalization effect. The type and volume fraction of texture in the final annealing sheet differ a lot after incomplete and fully normalized annealing, depending on the degree of recrystallization. The final texture composition remains unchanged when normalized annealing is incomplete, while full normalized annealing leads to the disappearance of some textures. The mechanical and magnetic properties of the final annealing sheet show consistency when fully normalized. The sheet achieved by route B 2 are R p0.2 %513 MPa, R m %646 MPa, elongation %17.2%, P 10/400 % 28.7 W kg À1 , and B 50 %1.64 T, achieving the best mechanical and magnetic properties in combination.

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Section: Resultsmentioning

confidence: 60%

Comprehensive Influence of the Normalized and Final Annealing Process on High‐Strength Nonoriented Silicon Steel

Song

Wang

et al. 2022

steel research int.

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“…Recently, innovative procedures in production have been implemented to satisfy the above requirements [33,34]. In some cases, an additional hot strip annealing before cold rolling is used to achieve commercially higher permeability grades [35,36]. In case of Fe-Si steels with phase transformation, the modification of the hot rolling schedule or hot finishing temperature could improve the magnetization behavior due to the sharper texture components [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Fast Heating Treatment Effect on Microstructure, Mechanical Properties and Magnetic Characteristics of Non-Oriented Grain Electrical Steels

Gaggiotti,

Albini,

Stornelli

et al. 2023

Applied Sciences

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This paper focuses on the effect of rapid annealing on Non-Grain Oriented Electrical Steel (NGO) in terms of microstructure, mechanical properties, and magnetic properties. The Ultra-Fast Heating (UFH) tests were performed by a transversal induction heater on NGO electrical steel samples (cold rolled down to 0.5 mm), varying the heating power (80 kW and 90 kW) and the speed of the strip through the induction heater. This allowed us to exploit heating rates (HR) in the range of 200–300 °C/s and targeting peak temperature (Tpeak) up to a maximum of 1250 °C. The comparison between the microstructure as obtained by conventional annealing and the ultra-fast heating process highlights a clear effect in terms of grain size refinement provided by the UFH. In particular, the average grain size as obtained by UFH ranges two/three times lower than by a conventional process. The results show the possibility of applying UFH to NGO steels, targeting mechanical properties such as those obtained by the standard process, combined with the benefits from this innovative heat treatment in terms of green energy and the minimization of CO2 emissions. Magnetic characterization performed by a single sheet tester (30 × 90 mm) showed that the values of core losses are comparable with conventional NGO grades.

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“…Numerous investigations [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ] have already been conducted trying to optimize the processing parameters to eliminate the magnetically unfavorable texture while promoting the desired texture in non-oriented electrical steels. Increasing the shear band structure of the cold-rolled sheet is an effective way to promote <001>//ND texture of non-oriented electrical steel in the recrystallization process [ 13 , 14 , 15 , 16 , 17 ]. The Taylor model is also used to theoretically simulate the initial grain deformation process [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Texture Evolution during Recrystallization and Grain Growth in Non-Oriented Electrical Steel Produced by Compact Strip Production Process

et al. 2021

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Evolution of texture and α*-fiber texture formation mechanism of Fe-0.65%Si non-oriented electrical steel produced by Compact Strip Production (CSP) process during all the thermo-mechanical processing steps were investigated using electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) techniques. Columnar crystal structure of cast slab is fine and well-developed. Textures of the hot-rolled band are quite different in the thickness direction. During annealing of cold-rolled sheet, γ-fiber texture grains would nucleate and grow preferentially, and α*-fiber texture grains mainly nucleate and grow in the shear zone of α-fiber texture of cold-rolled sheet. During the recrystallization process, γ-fiber texture gradually concentrated to {111}<112>, and γ and α*-fiber texture increased significantly. {111}<112> texture priority nucleation at the initial stage of recrystallization. Due to the advantages of nucleation position and quantity, the content of α*-fiber texture is greater than {111}<112> texture in the mid-recrystallization. During grain growth process, {111}<112> oriented grains would grow selectively by virtue of higher mobility, sizes and quantity advantages than that of {411}<148 > and {100}<120>, resulting in the gradual increase of γ-fiber texture and the decline of α *-fiber texture.

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Effect of hot band annealing on inclusions, texture, and magnetic properties of 2.97%Si-0.59% Al non-oriented silicon steel

Cited by 8 publications

References 21 publications

Comprehensive Influence of the Normalized and Final Annealing Process on High‐Strength Nonoriented Silicon Steel

Comprehensive Influence of the Normalized and Final Annealing Process on High‐Strength Nonoriented Silicon Steel

Ultra-Fast Heating Treatment Effect on Microstructure, Mechanical Properties and Magnetic Characteristics of Non-Oriented Grain Electrical Steels

Texture Evolution during Recrystallization and Grain Growth in Non-Oriented Electrical Steel Produced by Compact Strip Production Process

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