Improving the Magnetic Properties of Non-Oriented Electrical Steels by Secondary Recrystallization Using Dynamic Heating Conditions

Petryshynets, Ivan; Kováč, František; Petrov, B. D.; Falat, Ladislav; Puchý, Viktor

doi:10.3390/ma12121914

Cited by 14 publications

(11 citation statements)

References 33 publications

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“…The development of secondary recrystallization has a great impact on the magnetic properties of grain-oriented silicon steel. Many studies [1][2][3][4][5][6][7] have been conducted on the related factors affecting secondary recrystallization, including key element content, precipitate, primary recrystallization structure, high-temperature annealing process, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gradient Heat Conduction on Secondary Recrystallization of Grain-Oriented Silicon Steel

Gao,

Wang,

et al. 2024

Metals

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The grain-oriented silicon steels were subjected to gradient heat conduction during high-temperature annealing by using thermal insulation cotton. The macrostructures of samples subjected to circumferential gradient heat conduction showed a “petal-like” morphology with peripheral columnar grains and central equiaxed grains, while samples subjected to transverse gradient heat conduction showed a morphology with approximately 50% columnar grains and 50% equiaxed grains. The grain orientations, magnetic domains as well as magnetic properties in different regions were detected. Results showed that the magnetic induction intensity of cylindrical grains was better than that of equiaxed grains while the iron loss was worse, which indicated that a fast heating rate during high-temperature annealing was conducive to the accuracy of Goss grains. The magnetic domains in columnar grains were wider than the equiaxed grains, which resulted in poorer iron loss. A theory of the competitive growth among secondary Goss grains was proposed. Under the condition of gradient heat conduction, once the Goss grains with the fastest heat conduction grew up abnormally, they would compete with other Goss grains which were supposed to survive in traditional processes and swallow up them until adjacent to the secondary equiaxed grains which were later developed.

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Section: Introductionmentioning

confidence: 99%

Effect of Gradient Heat Conduction on Secondary Recrystallization of Grain-Oriented Silicon Steel

Gao,

Wang,

et al. 2024

Metals

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“…In contrast, Jong-Tae et al [21] found that Goss texture and γ-fiber components are weakened during grain growth. Based on previous studies, few researches had reported the microstructure and texture of thin-gauge non-oriented silicon steel during recrystallization annealing [22][23][24][25][26]. A more indepth analysis of the influence of recrystallization annealing temperatures on microstructure, texture, and magnetic properties is subsequently required.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

Kvačkaj¹,

Demjan

Bella

et al. 2022

Acta Metall Slovaca

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The paper is focused on a comparison of the magnetic properties of the non-oriented isotropic electrical steel containing 3.5% Si. The material was processed by conventional ambient temperature rolling and progressive rolling at the cryogenic conditions at liquid nitrogen. Deformations of the samples in both thermal conditions were in the interval εÎ<5;35>[%]. Subsequently, the samples were heat treated at temperatures TÎ<900;1100> [°C]. Measuring of the magnetic properties was carried out in an alternating magnetic field at frequencies f= 50; 100; 150 Hz. At a frequency of 50 Hz were achieved smallest magnetic losses and therefore further measurements were made at a given frequency. Followed measurements of the magnetic induction were conducted at different intensities of the magnetic field. EBSD analyses were performed to obtain the IPF maps on which the resulting structure was evaluated after processing of the material. The specific magnetic losses were compared to different processing methods. The best magnetic properties defined as by minimal values of core loses were reached after samples rolled at cryogenic temperature followed by subsequently annealed. Also, higher proportion of cubic texture was archived after rolling at cryogenic temperature with compared to samples processed at ambient temperature.

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“…The magnetic properties of the electrical steel are influenced by different parameters, such as sheet thickness, chemical composition and microstructure, and particularly by the grain size. Previous studies reported that large grain sizes are desired to improve the soft magnetic properties of the electrical steel [ 3 , 4 ]. Lee et al [ 4 ] analyzed the magnetic properties of electrical steel as function of the grain size and found that samples with finer grains exhibited approximately 15% higher core loss W with little effect on the magnetic flux density B, compared to samples with larger grains.…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO2

et al. 2021

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The corrosion behavior of two silicon steels with the same chemical composition but different grains sizes (i.e., average grain area of 115.6 and 4265.9 µm2) was investigated by metallographic microscope, gravimetric, electrochemical and surface analysis techniques. The gravimetric and electrochemical results showed that the corrosion rate increased with decreasing the grain size. The scanning electron microscopy/energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopyanalyses revealed formation of a more homogeneous and compact corrosion product layer on the coarse-grained steel compared to fine-grained material. The Volta potential analysis, carried out on both steels, revealed formation of micro-galvanic sites at the grain boundaries and triple junctions. The results indicated that the decrease in corrosion resistance in the fine-grained steel could be attributed to the higher density of grain boundaries (e.g., a higher number of active sites and defects) brought by the refinement. The higher density of active sites at grain boundaries promote the metal dissolution of the and decreased the stability of the corrosion product layerformed on the metal surface.

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Improving the Magnetic Properties of Non-Oriented Electrical Steels by Secondary Recrystallization Using Dynamic Heating Conditions

Cited by 14 publications

References 33 publications

Effect of Gradient Heat Conduction on Secondary Recrystallization of Grain-Oriented Silicon Steel

Effect of Gradient Heat Conduction on Secondary Recrystallization of Grain-Oriented Silicon Steel

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO2

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