Effect of Hot Band Annealing Temperature on the Magnetic Properties of Low-carbon Electrical Steels.

Hou, Chun‐Kan

doi:10.2355/isijinternational.36.563

Cited by 25 publications

(9 citation statements)

References 2 publications

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“…The prior hot band grain size also influences the final grain size after final continuous annealing. 17) During final annealing, the prior grain boundary is a potential nucleation site for recrystallization. Fewer nucleation sites occurring in the deformed matrix lead to a coarser grain.…”

Section: Grain Size After Final Cold-rolled Steel Sheetsmentioning

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: Grain Size After Final Cold-rolled Steel Sheetsmentioning

confidence: 99%

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

Hou

Liao

2008

ISIJ Int.

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“…Electrical steel texture development has been investigated [1][2][3][4][5][6][7][8][9] and the effect of the hot band grain size has been the subject of several studies. [6][7][8] But, more specifically, the effect of silicon on the texture development of semiprocessed electrical steels was not studied in depth.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] But, more specifically, the effect of silicon on the texture development of semiprocessed electrical steels was not studied in depth. Among the reports on this subject are those of Kestens et al 1) that discussed the recrystallization texture in high Si steels and Hou,2) which found more favorable recrystallization textures for steels with higher Si content.…”

Section: Introductionmentioning

confidence: 99%

Texture Evolution during the Processing of Electrical Steels with 0.5% Si and 1.25% Si

et al. 2004

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“…Alternative processing routes have been reported for production of low core losses electrical steel grades, such as optimized hot rolling, annealing prior to cold rolling and cold rolling in two steps with intermediate annealing [18,19]. Annealing prior to cold rolling has been investigated mainly in ultra-low carbon electrical steels [20,21]. Hou [20] studied the effect of annealing prior to cold rolling on the energy losses of an electrical steel containing 0.0023% C, 0.31% Si and 0.002% Al.…”

Section: Introductionmentioning

confidence: 99%

“…Annealing prior to cold rolling has been investigated mainly in ultra-low carbon electrical steels [20,21]. Hou [20] studied the effect of annealing prior to cold rolling on the energy losses of an electrical steel containing 0.0023% C, 0.31% Si and 0.002% Al. It was observed that annealing prior to cold rolling promoted an increase of the (I/I R ) 110 and (I/I R ) 200 relative pole densities and a decrease of the (I/I R ) 211 and (I/I R ) 222 during the final annealing.…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing prior to cold rolling on magnetic and mechanical properties of low carbon non-oriented electrical steels

Gutiérrez-Castañeda

Salinas‐Rodríguez

2011

Journal of Magnetism and Magnetic Materials

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Effect of Hot Band Annealing Temperature on the Magnetic Properties of Low-carbon Electrical Steels.

Abstract: The effect of hot band annealing temperature, range from 700-1 OOO'C, on the magnetic properties of low-carbon electrical steels measuredat 10

Cited by 25 publications

References 2 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

Texture Evolution during the Processing of Electrical Steels with 0.5% Si and 1.25% Si

Effect of annealing prior to cold rolling on magnetic and mechanical properties of low carbon non-oriented electrical steels

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