Heatproof Domain Refining Method Using Combination of Local Strain and Heat Treatment for Grain Oriented 3% Si-Fe

Kobayashi, Hisashi; Kuroki, Katsuro; Sasaki, Erika; Takahashi, Nobuyuki

doi:10.1088/0031-8949/1988/t24/005

Cited by 15 publications

(2 citation statements)

References 4 publications

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“…Laser irradiation followed by nitric acid etching to create 0.3 mm diameter, 0.02 mm deep pits, in lines 5 mm apart, has been shown to create refinement that is stable after recoating and stress relief annealing at 800°C [39]. Another method is to use a gear-type roller to make groves in the steel surface and to lock in the internal strain by the application of a tension coating [40]. Such methods are now being commercially evaluated.…”

Section: History and Production Technologymentioning

confidence: 99%

Electrical steels: past, present and future developments

Moses

1990

IEE Proceedings a (Physical Science, Measurement and Instrumentation, Management and Education)

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Electrical steels are the most important magnetic materials produced in Europe where the total sales market is around E400 million per annum. Its main use is as the magnetic core material of rotating machines and transformers. When magnetised in such equipment, it dissipates iron losses (as heat) which use up around 5% of all the energy generated in the UK. Over the past 20 years, the quality of electrical steels has improved vastly, because of improved manufacturing techniques and a better understanding of factors which control the magnetic properties. The paper reviews the development of electrical steels from hot-rolled silicon iron, first produced around 1905, through the discovery of grain-oriented steels in the late 1930s, to the modern domainrefined high-permeability materials and low-loss nonoriented steels. This is followed by a discussion of the most important factors which affect the properties of modern electrical steels. Amorphous magnetic materials are now competing in some of the markets traditionally monopolised by electrical steels. The paper reviews the existing status of amorphous materials compared to conventional electrical steels and concludes by considering how these and other competing materials might develop in the future.

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Section: History and Production Technologymentioning

confidence: 99%

Electrical steels: past, present and future developments

Moses

1990

IEE Proceedings a (Physical Science, Measurement and Instrumentation, Management and Education)

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“…C ERTAIN magnetic properties of ferromagnetic materials can be modified by controlling or designing the structure of the magnetic domains, which presents the opportunity to tailor magnetic properties by domain engineering. An early but excellent example is the case of grain-oriented (GO) electrical steel, in which a reduction in energy loss is achieved by decreasing the domain width [1], [2], [3], [4]. Some of the magnetic properties of GO electrical steel are undoubtedly governed by the magnetic domain structure.…”

Section: Introductionmentioning

confidence: 99%

Observation of Buried Magnetic Domains in Grain-Oriented Electrical Steel

Inami

Sugawara

Nakada³

et al. 2023

IEEE Trans. Magn.

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Bulk-sensitive microscopic measurements of buried magnetic domains are reported. Utilizing a new magneto-optical effect in the hard X-ray regime, referred to as X-ray magnetic circularly polarized emission, the internal transverse domains in a grainoriented electrical steel sheet are unambiguously observed. This allows the lateral shapes of the transverse domains to be successfully visualized. In addition, we discuss the magnetic domain structure of the supplementary domains below the surface from measurements performed at several pairs of incident and exit angles.

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Trends in the development of grain‐oriented electrical sheet

Bölling¹,

Günther²,

Böttcher³

et al. 1992

Steel Research

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Thin gauge, high silicon content, perfect crystal orientation and small domain wall spacings are the fundamental features of an ideal electrical steel sheet with minimum core loss and maximum polarization. For achieving these properties in the fabrication process, very exact control of secondary recrystalliration is necessary, which becomes more and more difficult with decreasing sheet thickness and increasing silicon content. In the present paper the influence of the starting conditions – i.e. the primary recrystallized grain structure and precipitation distribution – on selective grain growth and Goss‐texture formation is described. For RGO and HGO typical differences in the primary grain size, critical inhibitor diameter and amount of primary Goss‐grains have been observed. By increasing the knowledge about the physics of electrical steel sheet, the fabrication process and magnetic properties have been continuously improved in the past. Today, new techniques of strip production like thin strip casting are an important aspect for further development offering very promising perspectives on new possibilities of texture control.

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Heatproof Domain Refining Method Using Combination of Local Strain and Heat Treatment for Grain Oriented 3% Si-Fe

Cited by 15 publications

References 4 publications

Electrical steels: past, present and future developments

Electrical steels: past, present and future developments

Observation of Buried Magnetic Domains in Grain-Oriented Electrical Steel

Trends in the development of grain‐oriented electrical sheet

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