The effect of aluminium on the magnetic properties of lamination steels

Hou, Chun‐Kan; Hu, Chi‐Chang; Lee, S.

doi:10.1109/20.105054

Cited by 30 publications

(13 citation statements)

References 11 publications

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“…Many factors, such as chemical composition, impurities, inclusions, grain size, and texture are known to influence the magnetic properties of non-oriented electrical steels. [1][2][3][4][5][6][7][8] It is well known that impurities and inclusions are deleterious to magnetic properties, either directly by impeding the magnetic domain movement, or indirectly through refining the grain size during final annealing. Sulfur is a harmful impurity element in electrical steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cerium Content on the Magnetic Properties of Non-oriented Electrical Steels

Hou

Liao

2008

ISIJ Int.

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The effects of cerium content in the range of 0-0.022 wt%, on the microstructure, texture and magnetic properties of four non-oriented electrical steels have been studied. After final annealing, grain size increased with increasing cerium content and reached a maximum value in the steel with 0.011 wt% cerium. Furthermore, steel containing 0.003 wt% cerium had the strongest (110)͗001͘ texture among the steels. In the steel with the same cerium content, the intensity of (111)͗uvw͘ fiber texture decreased with decreasing hot finishing rolling temperature and increasing hot band annealing temperature. Under the same processing conditions, flux density slightly increased with increasing cerium and reached a maximum value in the steel with 0.003 wt% cerium. For steel with the same cerium content, flux density increased with increasing hot band annealing temperature and decreasing hot finishing rolling temperature. Conversely, core loss decreased with increasing cerium content and reached a minimum value in the steels containing 0.003 wt% cerium. For steel with the same cerium content, core loss decreased with increasing hot band annealing temperature and decreasing hot finishing rolling temperature. Steel with 0.003 wt% cerium obtained the best magnetic properties, predominantly through the development of favorable texture and optimum grain size.KEY WORDS: electrical steel; cerium; texture; grain size; magnetic property.nace and cast into 500 mmϫ300 mmϫ100 mm ingots. Table 1 shows their chemical compositions. The proportions of cerium content were 0, 0.003, 0.011, and 0.022 wt%. The proportions of other elements were 0.003 wt% carbon, 1.15 wt% silicon, 0.42 wt% manganese, 0.009 wt% phosphorus, 0.006 wt% sulfur, and 0.33 wt% aluminum, with 0.002 wt% nitrogen and 0.0007 wt% oxygen. The steel ingots were reheated to 1 200°C for 2 h, and hot-rolled in two steps by a two-high pilot hot rolling mill with intermediate annealing at 1 200°C for 1 h. Two levels of hot-rolled finishing temperature were conducted at 890°C and 820°C. The thickness of steel ingots after rough rolling was 20 mm, and after finishing rolling was 3.2 mm. After air cooling to room temperature, hot-rolled bands were annealed at 900°C and 700°C respectively for 2 h and allowed to cool in the furnace. Then, the annealed hot-rolled bands were uniformly milled to 2.3 mm by a milling machine from both sides to remove any scale on the surfaces. A four high pilot cold rolling mill was used to cold-roll the hot-rolled bands to the final thickness of 0.5 mm with a total reduction of 78 %. Then, the cold-rolled steels sheets were cut into 60 mmϫ30 mm coupons both in longitudinal and transverse direction with respect to the rolling direction. Finally, the coupons were annealed in a vacuum infrared furnace set at 950°C for 2 min with a heating rate 5°C per second to simulate continuous annealing.After cold-rolling and final annealing, magnetic properties of the specimens were measured using a Soken DAC-BHW-2 electrical steel tester. Magnetic flux density was measure...

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Section: Introductionmentioning

confidence: 99%

Effect of Cerium Content on the Magnetic Properties of Non-oriented Electrical Steels

Hou

Liao

2008

ISIJ Int.

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Section: Resultsmentioning

confidence: 99%

“…(1), (2) [11,12] , where T is the temperature, K. The relationship between the content of BN, AlN type precipitates and temperature in all the tested steels, which was calculated by Eqs. (1), (2), is shown in Fig.1. It can be seen that the starting precipitation temperatures of AlN type precipitates are signifi cantly higher than that of BN type precipitates in all the tested steels, which indicates that aluminum could combine with free nitrogen preferentially to form coarse AlN particles.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, much research is devoted to the study and development of high magnetic induction and low core loss electrical steels. Many factors, such as chemical composition, impurities, inclusions, grain size, and texture are known to influence the magnetic properties of non-oriented electrical steels [1][2][3][4] . It is well known that impurities and inclusions are deleterious to magnetic properties, either directly by impeding the magnetic domain movement, or indirectly through refining the grain size during fi nal annealing [5,6] .…”

Section: Introductionmentioning

confidence: 99%

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Effect of boron content on the microstructure and magnetic properties of non-oriented electrical steels

Wan

Chen

2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The effects of boron content in the range of 0-0.0082 wt%, on the inclusion type, microstructure, texture and magnetic properties of non-oriented electrical steels have been studied. After fi nal annealing, the addition of excess boron(w(Bt)>0.004 1 wt%) led to the formation of Fe 2 B particles. As boron content increased, grain size increased and reached a maximum in steel with 0.004 1 wt% boron. Furthermore, steel containing 0.004 1 wt% boron had the strongest {100} fi ber texture, Goss texture and the weakest {111} fi ber texture among the fi ve tested steels. Flux density fi rstly rapidly increased and then suddenly decreased with increasing boron content and reached a maximum in steel with 0.004 1 wt% boron. Conversely, core loss fi rst sharply decreased and then abruptly increased with the increase of boron content and reached a minimum in steel containing 0.004 1 wt% boron. Steel containing 0.004 1 wt% boron obtained the best magnetic properties, predominantly through the development of optimum grain size and favorable texture.

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“…O gráfico da Figura 14 foi construído apartir de dados publicados por Hou [16] onde foram analisados aços elétricos com teores de alumínio variando entre 0,022 e 0,32p%.…”

Section: Figura 11unclassified

Efeito do tamanho de grão e da indução magnética sobre o campo coercivo e dissipação de energia por histereses em aços para fins elétricos

Junior¹,

Luiz²

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The effect of aluminium on the magnetic properties of lamination steels

Cited by 30 publications

References 11 publications

Effect of Cerium Content on the Magnetic Properties of Non-oriented Electrical Steels

Effect of Cerium Content on the Magnetic Properties of Non-oriented Electrical Steels

Effect of boron content on the microstructure and magnetic properties of non-oriented electrical steels

Efeito do tamanho de grão e da indução magnética sobre o campo coercivo e dissipação de energia por histereses em aços para fins elétricos

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